test: add formal hotpath ABBA runner

Co-Authored-By: heihutu <heihutu@gmail.com>

Cargo.lock

@@ -3672,6 +3672,7 @@ dependencies = [
  "flate2",
  "futures",
  "hex",
+ "hotpath",
  "http 1.5.0",
  "http-body-util",
  "hyper",
@@ -9039,6 +9040,7 @@ dependencies = [
  "const-str",
  "futures",
  "hashbrown 0.17.1",
+ "hotpath",
  "metrics",
  "rustfs-config",
  "rustfs-s3-types",
@@ -9059,6 +9061,7 @@ dependencies = [
  "base64-simd",
  "bytes",
  "crc-fast",
+ "hotpath",
  "http 1.5.0",
  "md-5 0.11.0",
  "pretty_assertions",
@@ -9072,6 +9075,7 @@ name = "rustfs-common"
 version = "1.0.0-beta.12"
 dependencies = [
  "chrono",
+ "hotpath",
  "metrics",
  "rmp-serde",
  "s3s",
@@ -9086,6 +9090,7 @@ dependencies = [
 name = "rustfs-concurrency"
 version = "1.0.0-beta.12"
 dependencies = [
+ "hotpath",
  "insta",
  "rustfs-io-core",
  "serde",
@@ -9099,6 +9104,7 @@ name = "rustfs-config"
 version = "1.0.0-beta.12"
 dependencies = [
  "const-str",
+ "hotpath",
  "serde",
  "serde_json",
 ]
@@ -9109,6 +9115,7 @@ version = "1.0.0-beta.12"
 dependencies = [
  "base64-simd",
  "hmac 0.13.0",
+ "hotpath",
  "rand 0.10.2",
  "serde",
  "serde_json",
@@ -9124,6 +9131,7 @@ dependencies = [
  "argon2",
  "base64-simd",
  "chacha20poly1305",
+ "hotpath",
  "jsonwebtoken 11.0.0",
  "pbkdf2 0.13.0",
  "rand 0.10.2",
@@ -9141,6 +9149,7 @@ name = "rustfs-data-usage"
 version = "1.0.0-beta.12"
 dependencies = [
  "async-trait",
+ "hotpath",
  "rmp-serde",
  "rustfs-filemeta",
  "serde",
@@ -9286,6 +9295,7 @@ dependencies = [
 name = "rustfs-extension-schema"
 version = "1.0.0-beta.12"
 dependencies = [
+ "hotpath",
  "serde",
  "serde_json",
  "thiserror 2.0.19",
@@ -9324,6 +9334,7 @@ dependencies = [
  "async-trait",
  "base64 0.23.0",
  "futures",
+ "hotpath",
  "http 1.5.0",
  "metrics",
  "rustfs-common",
@@ -9355,6 +9366,7 @@ dependencies = [
  "async-trait",
  "base64-simd",
  "futures",
+ "hotpath",
  "http 1.5.0",
  "jsonwebtoken 11.0.0",
  "moka",
@@ -9389,6 +9401,7 @@ name = "rustfs-io-core"
 version = "1.0.0-beta.12"
 dependencies = [
  "bytes",
+ "hotpath",
  "memmap2",
  "rustfs-io-metrics",
  "thiserror 2.0.19",
@@ -9401,6 +9414,7 @@ name = "rustfs-io-metrics"
 version = "1.0.0-beta.12"
 dependencies = [
  "criterion",
+ "hotpath",
  "metrics",
  "metrics-util",
  "num_cpus",
@@ -9467,6 +9481,7 @@ version = "1.0.0-beta.12"
 dependencies = [
  "bytes",
  "futures",
+ "hotpath",
  "http 1.5.0",
  "http-body 1.1.0",
  "http-body-util",
@@ -9499,9 +9514,12 @@ dependencies = [
  "base64 0.23.0",
  "chacha20poly1305",
  "hex",
+ "hotpath",
  "insta",
  "jiff",
  "md-5 0.11.0",
+ "metrics",
+ "metrics-util",
  "moka",
  "rand 0.10.2",
  "reqwest",
@@ -9529,6 +9547,7 @@ name = "rustfs-lifecycle"
 version = "1.0.0-beta.12"
 dependencies = [
  "async-trait",
+ "hotpath",
  "metrics",
  "metrics-util",
  "proptest",
@@ -9553,6 +9572,7 @@ dependencies = [
  "async-trait",
  "crossbeam-queue",
  "futures",
+ "hotpath",
  "parking_lot",
  "rand 0.10.2",
  "rustfs-io-metrics",
@@ -9574,6 +9594,7 @@ version = "1.0.0-beta.12"
 dependencies = [
  "chrono",
  "flate2",
+ "hotpath",
  "regex",
  "serde",
  "serde_json",
@@ -9591,6 +9612,7 @@ name = "rustfs-madmin"
 version = "1.0.0-beta.12"
 dependencies = [
  "chrono",
+ "hotpath",
  "humantime",
  "hyper",
  "rmp-serde",
@@ -9611,6 +9633,7 @@ dependencies = [
  "criterion",
  "form_urlencoded",
  "hashbrown 0.17.1",
+ "hotpath",
  "metrics",
  "percent-encoding",
  "quick-xml",
@@ -9640,6 +9663,7 @@ version = "1.0.0-beta.12"
 dependencies = [
  "criterion",
  "futures",
+ "hotpath",
  "rustfs-config",
  "rustfs-io-metrics",
  "rustfs-utils",
@@ -9658,6 +9682,7 @@ version = "1.0.0-beta.12"
 dependencies = [
  "bytes",
  "criterion",
+ "hotpath",
  "metrics",
  "metrics-util",
  "moka",
@@ -9680,6 +9705,7 @@ dependencies = [
  "flate2",
  "futures-util",
  "glob",
+ "hotpath",
  "jiff",
  "libc",
  "metrics",
@@ -9765,6 +9791,7 @@ dependencies = [
  "futures-util",
  "hex",
  "hmac 0.13.0",
+ "hotpath",
  "http 1.5.0",
  "http-body-util",
  "hyper",
@@ -9817,6 +9844,7 @@ name = "rustfs-protos"
 version = "1.0.0-beta.12"
 dependencies = [
  "flatbuffers",
+ "hotpath",
  "prost 0.14.4",
  "rmp-serde",
  "rustfs-common",
@@ -9841,6 +9869,7 @@ version = "1.0.0-beta.12"
 dependencies = [
  "byteorder",
  "bytes",
+ "hotpath",
  "regex",
  "rmp",
  "rmp-serde",
@@ -9899,6 +9928,7 @@ dependencies = [
  "chacha20poly1305",
  "hex",
  "hmac 0.13.0",
+ "hotpath",
  "minlz",
  "pin-project-lite",
  "rand 0.10.2",
@@ -9916,6 +9946,7 @@ dependencies = [
 name = "rustfs-s3-ops"
 version = "1.0.0-beta.12"
 dependencies = [
+ "hotpath",
  "rustfs-s3-types",
 ]
 
@@ -9923,6 +9954,7 @@ dependencies = [
 name = "rustfs-s3-types"
 version = "1.0.0-beta.12"
 dependencies = [
+ "hotpath",
  "serde",
  "serde_json",
 ]
@@ -9937,6 +9969,7 @@ dependencies = [
  "datafusion",
  "futures",
  "futures-core",
+ "hotpath",
  "http 1.5.0",
  "metrics",
  "parking_lot",
@@ -9965,6 +9998,7 @@ dependencies = [
  "datafusion",
  "derive_builder",
  "futures",
+ "hotpath",
  "parking_lot",
  "rustfs-s3select-api",
  "s3s",
@@ -9982,6 +10016,7 @@ dependencies = [
  "futures",
  "hex-simd",
  "hmac 0.13.0",
+ "hotpath",
  "http 1.5.0",
  "metrics",
  "rand 0.10.2",
@@ -10014,6 +10049,7 @@ dependencies = [
 name = "rustfs-security-governance"
 version = "1.0.0-beta.12"
 dependencies = [
+ "hotpath",
  "thiserror 2.0.19",
 ]
 
@@ -10023,6 +10059,7 @@ version = "1.0.0-beta.12"
 dependencies = [
  "base64-simd",
  "bytes",
+ "hotpath",
  "http 1.5.0",
  "hyper",
  "rustfs-utils",
@@ -10039,6 +10076,7 @@ name = "rustfs-storage-api"
 version = "1.0.0-beta.12"
 dependencies = [
  "async-trait",
+ "hotpath",
  "insta",
  "rustfs-filemeta",
  "serde",
@@ -10060,6 +10098,7 @@ dependencies = [
  "deadpool-postgres",
  "futures-util",
  "hashbrown 0.17.1",
+ "hotpath",
  "hyper",
  "hyper-rustls",
  "lapin",
@@ -10105,6 +10144,7 @@ dependencies = [
 name = "rustfs-test-utils"
 version = "1.0.0-beta.12"
 dependencies = [
+ "hotpath",
  "rustfs-data-usage",
  "rustfs-ecstore",
  "rustfs-storage-api",
@@ -10121,6 +10161,7 @@ name = "rustfs-tls-runtime"
 version = "1.0.0-beta.12"
 dependencies = [
  "arc-swap",
+ "hotpath",
  "metrics",
  "rcgen",
  "rustfs-common",
@@ -10142,6 +10183,7 @@ version = "1.0.0-beta.12"
 dependencies = [
  "async-trait",
  "axum",
+ "hotpath",
  "http 1.5.0",
  "ipnetwork",
  "metrics",
@@ -10188,6 +10230,7 @@ dependencies = [
  "hex-simd",
  "highway",
  "hmac 0.13.0",
+ "hotpath",
  "http 1.5.0",
  "hyper",
  "local-ip-address",
@@ -10220,6 +10263,7 @@ dependencies = [
  "astral-tokio-tar",
  "async-compression",
  "criterion",
+ "hotpath",
  "tempfile",
  "thiserror 2.0.19",
  "tokio",

crates/audit/Cargo.toml

@@ -25,7 +25,33 @@ documentation = "https://docs.rs/rustfs-audit/latest/rustfs_audit/"
 keywords = ["audit", "target", "management", "fan-out", "RustFS"]
 categories = ["web-programming", "development-tools", "asynchronous", "api-bindings"]
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "rustfs-config/hotpath",
+    "rustfs-s3-types/hotpath",
+    "rustfs-targets/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-s3-types/hotpath-alloc",
+    "rustfs-targets/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-s3-types/hotpath-cpu",
+    "rustfs-targets/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-targets = { workspace = true }
 rustfs-config = { workspace = true, features = ["audit", "server-config-model"] }
 rustfs-s3-types = { workspace = true }

crates/checksums/Cargo.toml

@@ -28,7 +28,14 @@ documentation = "https://docs.rs/rustfs-checksums/latest/rustfs_checksum/"
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 bytes = { workspace = true, features = ["serde"] }
 crc-fast = { workspace = true }
 http = { workspace = true }

crates/common/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["web-programming", "development-tools", "data-structures"]
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "hotpath/tokio"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 tokio = { workspace = true, features = ["fs", "rt-multi-thread"] }
 tonic = { workspace = true, features = ["gzip", "deflate"] }
 uuid = { workspace = true, features = ["v4", "fast-rng", "macro-diagnostics"] }

crates/concurrency/Cargo.toml

@@ -13,7 +13,14 @@ categories = ["concurrency", "filesystem"]
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "hotpath/tokio", "rustfs-io-core/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-io-core/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-io-core/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 # Internal crates
 rustfs-io-core = { workspace = true }
 serde = { workspace = true, features = ["derive"] }

crates/config/Cargo.toml

@@ -25,6 +25,7 @@ keywords = ["configuration", "settings", "management", "rustfs", "Minio"]
 categories = ["web-programming", "development-tools", "config"]
 
 [dependencies]
+hotpath.workspace = true
 const-str = { workspace = true, optional = true, features = ["std", "proc"] }
 serde = { workspace = true, optional = true, features = ["derive"] }
 serde_json = { workspace = true, optional = true, features = ["raw_value"] }
@@ -34,6 +35,9 @@ workspace = true
 
 [features]
 default = ["constants"]
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
 audit = ["dep:const-str", "constants"]
 constants = ["dep:const-str"]
 notify = ["dep:const-str", "constants"]

crates/credentials/Cargo.toml

@@ -24,7 +24,14 @@ description = "Credentials management utilities for RustFS, enabling secure hand
 keywords = ["rustfs", "Minio", "credentials", "authentication", "authorization"]
 categories = ["web-programming", "development-tools", "data-structures", "security"]
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 base64-simd = { workspace = true }
 hmac = { workspace = true }
 rand = { workspace = true, features = ["serde"] }

crates/crypto/Cargo.toml

@@ -29,6 +29,7 @@ documentation = "https://docs.rs/rustfs-crypto/latest/rustfs_crypto/"
 workspace = true
 
 [dependencies]
+hotpath.workspace = true
 aes-gcm = { workspace = true, optional = true, features = ["rand_core"] }
 argon2 = { workspace = true, optional = true }
 chacha20poly1305 = { workspace = true, optional = true }
@@ -49,6 +50,9 @@ time = { workspace = true, features = ["parsing", "formatting", "macros", "serde
 
 [features]
 default = ["crypto", "fips"]
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
 fips = []
 crypto = [
     "dep:aes-gcm",

crates/data-usage/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["data-structures", "filesystem"]
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "rustfs-filemeta/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-filemeta/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-filemeta/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 serde = { workspace = true, features = ["derive"] }
 rmp-serde = { workspace = true }
 async-trait = { workspace = true }

crates/e2e_test/Cargo.toml

@@ -25,10 +25,58 @@ workspace = true
 
 [features]
 default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/reqwest-0-13",
+    "rustfs-config/hotpath",
+    "rustfs-credentials/hotpath",
+    "rustfs-data-usage/hotpath",
+    "rustfs-ecstore/hotpath",
+    "rustfs-filemeta/hotpath",
+    "rustfs-lock/hotpath",
+    "rustfs-madmin/hotpath",
+    "rustfs-protos/hotpath",
+    "rustfs-rio/hotpath",
+    "rustfs-signer/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-credentials/hotpath-alloc",
+    "rustfs-data-usage/hotpath-alloc",
+    "rustfs-ecstore/hotpath-alloc",
+    "rustfs-filemeta/hotpath-alloc",
+    "rustfs-lock/hotpath-alloc",
+    "rustfs-madmin/hotpath-alloc",
+    "rustfs-protos/hotpath-alloc",
+    "rustfs-rio/hotpath-alloc",
+    "rustfs-signer/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-credentials/hotpath-cpu",
+    "rustfs-data-usage/hotpath-cpu",
+    "rustfs-ecstore/hotpath-cpu",
+    "rustfs-filemeta/hotpath-cpu",
+    "rustfs-lock/hotpath-cpu",
+    "rustfs-madmin/hotpath-cpu",
+    "rustfs-protos/hotpath-cpu",
+    "rustfs-rio/hotpath-cpu",
+    "rustfs-signer/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
 ftps = []
 sftp = []
 
 [dependencies]
+hotpath.workspace = true
 rustfs-config = { workspace = true, features = ["constants"] }
 rustfs-credentials.workspace = true
 rustfs-ecstore.workspace = true

crates/ecstore/Cargo.toml

@@ -40,19 +40,83 @@ hotpath = [
     "hotpath/async-channel",
     "hotpath/parking_lot",
     "hotpath/reqwest-0-13",
+    "rustfs-checksums/hotpath",
+    "rustfs-common/hotpath",
+    "rustfs-concurrency/hotpath",
+    "rustfs-config/hotpath",
+    "rustfs-credentials/hotpath",
+    "rustfs-data-usage/hotpath",
     "rustfs-filemeta/hotpath",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-lifecycle/hotpath",
+    "rustfs-lock/hotpath",
+    "rustfs-madmin/hotpath",
+    "rustfs-object-capacity/hotpath",
+    "rustfs-policy/hotpath",
+    "rustfs-protos/hotpath",
+    "rustfs-replication/hotpath",
     "rustfs-rio/hotpath",
+    "rustfs-rio-v2?/hotpath",
+    "rustfs-s3-types/hotpath",
+    "rustfs-signer/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-tls-runtime/hotpath",
+    "rustfs-utils/hotpath",
+    "rustfs-crypto/hotpath",
 ]
 hotpath-alloc = [
+    "hotpath",
     "hotpath/hotpath-alloc",
+    "rustfs-checksums/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-concurrency/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-credentials/hotpath-alloc",
+    "rustfs-data-usage/hotpath-alloc",
     "rustfs-filemeta/hotpath-alloc",
+    "rustfs-io-metrics/hotpath-alloc",
+    "rustfs-lifecycle/hotpath-alloc",
+    "rustfs-lock/hotpath-alloc",
+    "rustfs-madmin/hotpath-alloc",
+    "rustfs-object-capacity/hotpath-alloc",
+    "rustfs-policy/hotpath-alloc",
+    "rustfs-protos/hotpath-alloc",
+    "rustfs-replication/hotpath-alloc",
     "rustfs-rio/hotpath-alloc",
+    "rustfs-rio-v2?/hotpath-alloc",
+    "rustfs-s3-types/hotpath-alloc",
+    "rustfs-signer/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-tls-runtime/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+    "rustfs-crypto/hotpath-alloc",
 ]
 hotpath-cpu = [
     "hotpath",
     "hotpath/hotpath-cpu",
+    "rustfs-checksums/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-concurrency/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-credentials/hotpath-cpu",
+    "rustfs-data-usage/hotpath-cpu",
     "rustfs-filemeta/hotpath-cpu",
+    "rustfs-io-metrics/hotpath-cpu",
+    "rustfs-lifecycle/hotpath-cpu",
+    "rustfs-lock/hotpath-cpu",
+    "rustfs-madmin/hotpath-cpu",
+    "rustfs-object-capacity/hotpath-cpu",
+    "rustfs-policy/hotpath-cpu",
+    "rustfs-protos/hotpath-cpu",
+    "rustfs-replication/hotpath-cpu",
     "rustfs-rio/hotpath-cpu",
+    "rustfs-rio-v2?/hotpath-cpu",
+    "rustfs-s3-types/hotpath-cpu",
+    "rustfs-signer/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-tls-runtime/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+    "rustfs-crypto/hotpath-cpu",
 ]
 # Exposes shared lifecycle/tier test utilities (MockWarmBackend, fault
 # injection, xl.meta transition assertions) via `api::tier::test_util`.

crates/ecstore/src/lib.rs

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#![recursion_limit = "256"]
+
 /// Scope-based hotpath measurement for `#[async_trait]` methods, where
 /// `#[hotpath::measure]` would only time the boxed-future construction.
 /// The guard records wall time from this statement until the enclosing

crates/extension-schema/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["web-programming", "development-tools"]
 [lib]
 doctest = false
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 serde = { workspace = true, features = ["derive"] }
 thiserror.workspace = true
 

crates/filemeta/Cargo.toml

@@ -27,9 +27,9 @@ documentation = "https://docs.rs/rustfs-filemeta/latest/rustfs_filemeta/"
 
 [features]
 default = []
-hotpath = ["hotpath/hotpath", "hotpath/tokio"]
+hotpath = ["hotpath/hotpath", "hotpath/tokio", "rustfs-utils/hotpath"]
-hotpath-alloc = ["hotpath/hotpath-alloc"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-utils/hotpath-alloc"]
-hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-utils/hotpath-cpu"]
 
 [dependencies]
 hotpath.workspace = true

crates/heal/Cargo.toml

@@ -29,7 +29,48 @@ categories = ["web-programming", "development-tools", "filesystem"]
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "rustfs-common/hotpath",
+    "rustfs-concurrency/hotpath",
+    "rustfs-config/hotpath",
+    "rustfs-ecstore/hotpath",
+    "rustfs-madmin/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-utils/hotpath",
+    "rustfs-test-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-concurrency/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-ecstore/hotpath-alloc",
+    "rustfs-madmin/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+    "rustfs-test-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-concurrency/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-ecstore/hotpath-cpu",
+    "rustfs-madmin/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+    "rustfs-test-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-config = { workspace = true }
 rustfs-concurrency = { workspace = true }
 rustfs-ecstore = { workspace = true }

crates/heal/src/heal/erasure_healer.rs

@@ -159,6 +159,7 @@ impl ErasureSetHealer {
 
     /// execute erasure set heal with resume
     #[tracing::instrument(skip(self, buckets), fields(set_disk_id = %set_disk_id, bucket_count = buckets.len()))]
+    #[hotpath::measure]
     pub async fn heal_erasure_set(&self, buckets: &[String], set_disk_id: &str) -> Result<()> {
         debug!(
             target: "rustfs::heal::erasure_healer",

crates/heal/src/heal/task.rs

@@ -584,6 +584,7 @@ impl HealTask {
     }
 
     #[tracing::instrument(skip(self), fields(task_id = %self.id, heal_type = ?self.heal_type))]
+    #[hotpath::measure]
     pub async fn execute(&self) -> Result<()> {
         // update status and timestamps atomically to avoid race conditions
         let now = SystemTime::now();
@@ -759,6 +760,7 @@ impl HealTask {
 
     // specific heal implementation method
     #[tracing::instrument(skip(self), fields(bucket = %bucket, object = %object, version_id = ?version_id))]
+    #[hotpath::measure]
     async fn heal_object(&self, bucket: &str, object: &str, version_id: Option<&str>) -> Result<()> {
         debug!(
             target: "rustfs::heal::task",
@@ -1404,6 +1406,7 @@ impl HealTask {
         self.heal_bucket_objects(bucket, prefix).await
     }
 
+    #[hotpath::measure]
     async fn heal_bucket_objects(&self, bucket: &str, prefix: &str) -> Result<()> {
         let mut continuation_token: Option<String> = None;
         let mut scanned = 0u64;

crates/iam/Cargo.toml

@@ -28,7 +28,55 @@ documentation = "https://docs.rs/rustfs-iam/latest/rustfs_iam/"
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/reqwest-0-13",
+    "rustfs-config/hotpath",
+    "rustfs-credentials/hotpath",
+    "rustfs-crypto/hotpath",
+    "rustfs-ecstore/hotpath",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-madmin/hotpath",
+    "rustfs-policy/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-utils/hotpath",
+    "rustfs-test-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-credentials/hotpath-alloc",
+    "rustfs-crypto/hotpath-alloc",
+    "rustfs-ecstore/hotpath-alloc",
+    "rustfs-io-metrics/hotpath-alloc",
+    "rustfs-madmin/hotpath-alloc",
+    "rustfs-policy/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+    "rustfs-test-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-credentials/hotpath-cpu",
+    "rustfs-crypto/hotpath-cpu",
+    "rustfs-ecstore/hotpath-cpu",
+    "rustfs-io-metrics/hotpath-cpu",
+    "rustfs-madmin/hotpath-cpu",
+    "rustfs-policy/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+    "rustfs-test-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-credentials = { workspace = true }
 rustfs-config = { workspace = true, features = ["server-config-model"] }
 tokio = { workspace = true, features = ["fs", "rt-multi-thread"] }

crates/iam/src/store/object.rs

@@ -469,6 +469,7 @@ impl ObjectStore {
         });
     }
 
+    #[hotpath::measure]
     async fn list_all_iamconfig_items(&self) -> Result<HashMap<String, Vec<String>>> {
         let (tx, mut rx) = mpsc::channel::<StringOrErr>(100);
 
@@ -508,6 +509,7 @@ impl ObjectStore {
         Ok(res)
     }
 
+    #[hotpath::measure]
     async fn load_policy_doc_concurrent(&self, names: &[String], mode: LoadMode) -> Result<Vec<PolicyDoc>> {
         let mut futures = Vec::with_capacity(names.len());
 

crates/io-core/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["development-tools", "filesystem"]
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "hotpath/tokio", "rustfs-io-metrics/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-io-metrics/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-io-metrics/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 bytes = { workspace = true, features = ["serde"] }
 thiserror = { workspace = true }
 tokio = { workspace = true, features = ["io-util", "fs", "sync", "rt-multi-thread"] }

crates/io-metrics/Cargo.toml

@@ -28,7 +28,32 @@ categories = ["development-tools", "filesystem"]
 name = "metrics_pipeline"
 harness = false
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "rustfs-common/hotpath",
+    "rustfs-s3-ops/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-s3-ops/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-s3-ops/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 metrics = { workspace = true }
 rustfs-common = { workspace = true }
 rustfs-s3-ops = { workspace = true }

crates/keystone/Cargo.toml

@@ -28,7 +28,34 @@ authors.workspace = true
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/reqwest-0-13",
+    "rustfs-credentials/hotpath",
+    "rustfs-policy/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-credentials/hotpath-alloc",
+    "rustfs-policy/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-credentials/hotpath-cpu",
+    "rustfs-policy/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 tokio = { workspace = true, features = ["rt", "sync"] }
 reqwest = { workspace = true, features = ["json"] }
 serde = { workspace = true, features = ["derive"] }

crates/keystone/src/client.rs

@@ -95,6 +95,7 @@ impl KeystoneClient {
     }
 
     /// Validate a Keystone token
+    #[hotpath::measure]
     pub async fn validate_token(&self, token: &str) -> Result<KeystoneToken> {
         match self.version {
             KeystoneVersion::V3 => self.validate_token_v3(token).await,
@@ -238,6 +239,7 @@ impl KeystoneClient {
     }
 
     /// Get EC2 credentials for a user
+    #[hotpath::measure]
     pub async fn get_ec2_credentials(&self, user_id: &str, project_id: Option<&str>) -> Result<Vec<EC2Credential>> {
         let admin_token = self.get_admin_token().await?;
 

crates/kms/Cargo.toml

@@ -28,6 +28,7 @@ categories = ["cryptography", "web-programming", "authentication"]
 workspace = true
 
 [dependencies]
+hotpath.workspace = true
 # Core dependencies
 async-trait = { workspace = true }
 tokio = { workspace = true, features = ["fs", "io-util", "macros", "rt-multi-thread", "sync", "time"] }
@@ -37,6 +38,8 @@ serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true, features = ["raw_value"] }
 tracing = { workspace = true }
 thiserror = { workspace = true }
+# Operation metrics emitted by the retry policy engine (crate::policy).
+metrics = { workspace = true }
 
 # Cryptography
 aes-gcm = { workspace = true, features = ["rand_core"] }
@@ -72,6 +75,8 @@ tokio-util = { workspace = true }
 
 [dev-dependencies]
 anyhow = { workspace = true }
+# Debugging recorder for asserting emitted metrics in tests.
+metrics-util = { version = "0.20", features = ["debugging"] }
 insta = { workspace = true, features = ["yaml", "json"] }
 tempfile = { workspace = true }
 temp-env = { workspace = true }
@@ -80,3 +85,17 @@ tokio = { workspace = true, features = ["net", "test-util"] }
 
 [features]
 default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/reqwest-0-13",
+    "rustfs-security-governance/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-security-governance/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-security-governance/hotpath-cpu", "rustfs-utils/hotpath-cpu"]

crates/kms/src/manager.rs

@@ -66,16 +66,19 @@ impl KmsManager {
     }
 
     /// Encrypt data with a master key
+    #[hotpath::measure]
     pub async fn encrypt(&self, request: EncryptRequest) -> Result<EncryptResponse> {
         self.backend.encrypt(request).await
     }
 
     /// Decrypt data with a master key
+    #[hotpath::measure]
     pub async fn decrypt(&self, request: DecryptRequest) -> Result<DecryptResponse> {
         self.backend.decrypt(request).await
     }
 
     /// Generate a data encryption key
+    #[hotpath::measure]
     pub async fn generate_data_key(&self, request: GenerateDataKeyRequest) -> Result<GenerateDataKeyResponse> {
         self.backend.generate_data_key(request).await
     }

crates/kms/src/policy.rs

@@ -27,6 +27,12 @@
 //! retried automatically: a response lost after the server applied the write
 //! would otherwise be replayed into duplicate side effects (extra key versions,
 //! repeated deletes).
+//!
+//! Every execution also records operation metrics (attempt failures by retry
+//! class, terminal outcome, attempts used, wall-clock duration) through the
+//! process-global `metrics` recorder. Metric labels carry only static enum
+//! values — operation names, classes, outcomes — never key identifiers, key
+//! material, ciphertext, or tokens.
 
 use std::future::Future;
 use std::time::Duration;
@@ -200,6 +206,130 @@ fn equal_jitter(rng: &mut impl RngExt, cap: Duration) -> Duration {
     half + Duration::from_nanos(rng.random_range(0..=spread))
 }
 
+// ---------------------------------------------------------------------------
+// Metrics
+//
+// Every execution is recorded here, at the single choke point all backend
+// calls flow through, so instrumenting a new call site costs nothing beyond
+// naming its operation. Label values are exclusively static enum strings
+// (operation names, classes, outcomes) — key identifiers, key material,
+// ciphertext, and tokens must never reach a metric label.
+// ---------------------------------------------------------------------------
+
+/// Counter: operations executed, by `operation`, `op_class`, and `outcome`.
+const METRIC_OPERATIONS_TOTAL: &str = "rustfs_kms_backend_operations_total";
+/// Counter: failed attempts, by `operation` and `error_class` (including
+/// `attempt_timeout` for attempts cut off by the per-attempt timeout).
+const METRIC_ATTEMPT_FAILURES_TOTAL: &str = "rustfs_kms_backend_attempt_failures_total";
+/// Histogram: wall-clock duration of a whole operation (attempts plus
+/// backoff), in seconds, by `operation` and `outcome`.
+const METRIC_OPERATION_DURATION_SECONDS: &str = "rustfs_kms_backend_operation_duration_seconds";
+/// Histogram: attempts one operation used before completing, by `operation`
+/// and `outcome`.
+const METRIC_OPERATION_ATTEMPTS: &str = "rustfs_kms_backend_operation_attempts";
+
+impl OpClass {
+    fn as_label(self) -> &'static str {
+        match self {
+            OpClass::ReadIdempotent => "read_idempotent",
+            OpClass::MutatingNonIdempotent => "mutating_non_idempotent",
+            OpClass::Auth => "auth",
+        }
+    }
+}
+
+impl ErrorClass {
+    fn as_label(self) -> &'static str {
+        match self {
+            ErrorClass::RetryableConn => "retryable_conn",
+            ErrorClass::RetryableStatus => "retryable_status",
+            ErrorClass::Fatal => "fatal",
+        }
+    }
+}
+
+/// How one policy execution terminated, for the `outcome` metric label.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum Outcome {
+    Success,
+    /// A fatal-classified failure ended the operation on its first observation.
+    Fatal,
+    /// The attempt budget ran out; the last failure was retryable (including a
+    /// timed-out final attempt).
+    BudgetExhausted,
+    /// The operation deadline ran out before another attempt could complete.
+    DeadlineExceeded,
+    Cancelled,
+}
+
+impl Outcome {
+    fn as_label(self) -> &'static str {
+        match self {
+            Outcome::Success => "success",
+            Outcome::Fatal => "fatal",
+            Outcome::BudgetExhausted => "budget_exhausted",
+            Outcome::DeadlineExceeded => "deadline_exceeded",
+            Outcome::Cancelled => "cancelled",
+        }
+    }
+}
+
+/// Register metric descriptions once per process.
+fn describe_metrics() {
+    static DESCRIBE: std::sync::Once = std::sync::Once::new();
+    DESCRIBE.call_once(|| {
+        metrics::describe_counter!(
+            METRIC_OPERATIONS_TOTAL,
+            "Total KMS backend operations executed under the operation policy, by operation, operation class, and outcome"
+        );
+        metrics::describe_counter!(
+            METRIC_ATTEMPT_FAILURES_TOTAL,
+            "Total failed KMS backend attempts, by operation and retry classification"
+        );
+        metrics::describe_histogram!(
+            METRIC_OPERATION_DURATION_SECONDS,
+            "Wall-clock duration of KMS backend operations including retries and backoff, in seconds"
+        );
+        metrics::describe_histogram!(
+            METRIC_OPERATION_ATTEMPTS,
+            "Number of attempts a KMS backend operation used before completing"
+        );
+    });
+}
+
+/// Record one failed attempt with its retry classification.
+fn record_attempt_failure(operation: &'static str, error_class: &'static str) {
+    metrics::counter!(
+        METRIC_ATTEMPT_FAILURES_TOTAL,
+        "operation" => operation,
+        "error_class" => error_class
+    )
+    .increment(1);
+}
+
+/// Record the terminal outcome of one policy execution.
+fn record_operation(operation: &'static str, class: OpClass, outcome: Outcome, attempts: u32, elapsed: Duration) {
+    metrics::counter!(
+        METRIC_OPERATIONS_TOTAL,
+        "operation" => operation,
+        "op_class" => class.as_label(),
+        "outcome" => outcome.as_label()
+    )
+    .increment(1);
+    metrics::histogram!(
+        METRIC_OPERATION_DURATION_SECONDS,
+        "operation" => operation,
+        "outcome" => outcome.as_label()
+    )
+    .record(elapsed.as_secs_f64());
+    metrics::histogram!(
+        METRIC_OPERATION_ATTEMPTS,
+        "operation" => operation,
+        "outcome" => outcome.as_label()
+    )
+    .record(f64::from(attempts));
+}
+
 /// Run `attempt` under the policy.
 ///
 /// Each attempt is bounded by `attempt_timeout` (further capped by whatever is
@@ -230,13 +360,37 @@ where
 /// [`execute`] with an injectable jitter source so tests can pin deterministic
 /// backoff durations instead of asserting around random sleeps.
 pub(crate) async fn execute_with_jitter<T, F, Fut, J>(
+    operation: &'static str,
+    class: OpClass,
+    policy: &RetryPolicy,
+    cancel: &CancellationToken,
+    jitter: J,
+    attempt: F,
+) -> Result<T>
+where
+    F: FnMut() -> Fut,
+    Fut: Future<Output = std::result::Result<T, AttemptError>>,
+    J: FnMut(Duration) -> Duration,
+{
+    describe_metrics();
+    let started = Instant::now();
+    let mut attempts_made = 0u32;
+    let (outcome, result) = drive_attempts(operation, class, policy, cancel, jitter, attempt, &mut attempts_made).await;
+    record_operation(operation, class, outcome, attempts_made, started.elapsed());
+    result
+}
+
+/// The attempt loop behind [`execute_with_jitter`], returning the terminal
+/// outcome alongside the result so the caller can record it exactly once.
+async fn drive_attempts<T, F, Fut, J>(
     operation: &'static str,
     class: OpClass,
     policy: &RetryPolicy,
     cancel: &CancellationToken,
     mut jitter: J,
     mut attempt: F,
-) -> Result<T>
+    attempts_made: &mut u32,
+) -> (Outcome, Result<T>)
 where
     F: FnMut() -> Fut,
     Fut: Future<Output = std::result::Result<T, AttemptError>>,
@@ -247,48 +401,68 @@ where
 
     let mut attempt_no = 0u32;
     loop {
-        attempt_no += 1;
         if cancel.is_cancelled() {
-            return Err(KmsError::operation_cancelled(format!(
+            return (
-                "{operation} cancelled before attempt {attempt_no}"
+                Outcome::Cancelled,
-            )));
+                Err(KmsError::operation_cancelled(format!(
+                    "{operation} cancelled before attempt {}",
+                    attempt_no + 1
+                ))),
+            );
         }
         let remaining = deadline.saturating_duration_since(Instant::now());
         if remaining.is_zero() {
-            return Err(KmsError::operation_timed_out(format!(
+            return (
-                "{operation} exceeded operation deadline of {:?}",
+                Outcome::DeadlineExceeded,
-                policy.op_deadline
+                Err(KmsError::operation_timed_out(format!(
-            )));
+                    "{operation} exceeded operation deadline of {:?}",
+                    policy.op_deadline
+                ))),
+            );
         }
 
+        attempt_no += 1;
+        *attempts_made = attempt_no;
         let attempt_budget = policy.attempt_timeout.min(remaining);
         let outcome = tokio::select! {
             biased;
             _ = cancel.cancelled() => {
-                return Err(KmsError::operation_cancelled(format!("{operation} cancelled during attempt {attempt_no}")));
+                return (
+                    Outcome::Cancelled,
+                    Err(KmsError::operation_cancelled(format!("{operation} cancelled during attempt {attempt_no}"))),
+                );
             }
             outcome = tokio::time::timeout(attempt_budget, attempt()) => outcome,
         };
 
         let failure = match outcome {
-            Ok(Ok(value)) => return Ok(value),
+            Ok(Ok(value)) => return (Outcome::Success, Ok(value)),
-            Ok(Err(failure)) => failure,
+            Ok(Err(failure)) => {
-            Err(_) => AttemptError {
+                record_attempt_failure(operation, failure.class.as_label());
-                class: ErrorClass::RetryableConn,
+                failure
-                error: KmsError::operation_timed_out(format!(
+            }
-                    "{operation} attempt {attempt_no} timed out after {attempt_budget:?}"
+            Err(_) => {
-                )),
+                record_attempt_failure(operation, "attempt_timeout");
-            },
+                AttemptError {
+                    class: ErrorClass::RetryableConn,
+                    error: KmsError::operation_timed_out(format!(
+                        "{operation} attempt {attempt_no} timed out after {attempt_budget:?}"
+                    )),
+                }
+            }
         };
 
-        if failure.class == ErrorClass::Fatal || attempt_no >= max_attempts {
+        if failure.class == ErrorClass::Fatal {
-            return Err(failure.error);
+            return (Outcome::Fatal, Err(failure.error));
+        }
+        if attempt_no >= max_attempts {
+            return (Outcome::BudgetExhausted, Err(failure.error));
         }
 
         let backoff = jitter(backoff_cap(policy, attempt_no));
         if backoff >= deadline.saturating_duration_since(Instant::now()) {
             // Not enough deadline budget left for another attempt.
-            return Err(failure.error);
+            return (Outcome::DeadlineExceeded, Err(failure.error));
         }
         tracing::warn!(
             operation,
@@ -300,7 +474,10 @@ where
         tokio::select! {
             biased;
             _ = cancel.cancelled() => {
-                return Err(KmsError::operation_cancelled(format!("{operation} cancelled during retry backoff")));
+                return (
+                    Outcome::Cancelled,
+                    Err(KmsError::operation_cancelled(format!("{operation} cancelled during retry backoff"))),
+                );
             }
             _ = tokio::time::sleep(backoff) => {}
         }
@@ -628,4 +805,313 @@ mod tests {
         assert_eq!(classify_vaultrs(&ClientError::ResponseEmptyError), ErrorClass::Fatal);
         assert_eq!(classify_vaultrs(&ClientError::InvalidLoginMethodError), ErrorClass::Fatal);
     }
+
+    // -- Metric emission ----------------------------------------------------
+    //
+    // Each test installs a thread-local debugging recorder and drives a
+    // paused-clock current-thread runtime inside it, so the emitted metrics
+    // (including virtual-clock durations) are fully deterministic.
+
+    use metrics_util::MetricKind;
+    use metrics_util::debugging::{DebugValue, DebuggingRecorder};
+
+    type MetricEntry = (
+        metrics_util::CompositeKey,
+        Option<metrics::Unit>,
+        Option<metrics::SharedString>,
+        DebugValue,
+    );
+
+    /// Run `test` on a paused current-thread runtime under a debugging
+    /// recorder and return one snapshot of everything it emitted.
+    ///
+    /// A single snapshot per test on purpose: `Snapshotter::snapshot` drains
+    /// the recorded state, so taking it per assertion would only show the
+    /// first assertion any data.
+    fn record_metrics<Out>(test: impl FnOnce() -> std::pin::Pin<Box<dyn Future<Output = Out>>>) -> (Vec<MetricEntry>, Out) {
+        let recorder = DebuggingRecorder::new();
+        let snapshotter = recorder.snapshotter();
+        let out = metrics::with_local_recorder(&recorder, || {
+            let runtime = tokio::runtime::Builder::new_current_thread()
+                .enable_time()
+                .start_paused(true)
+                .build()
+                .expect("current-thread runtime must build");
+            runtime.block_on(test())
+        });
+        (snapshotter.snapshot().into_vec(), out)
+    }
+
+    fn labels_match(key: &metrics::Key, labels: &[(&str, &str)]) -> bool {
+        labels
+            .iter()
+            .all(|(label, expected)| key.labels().any(|l| l.key() == *label && l.value() == *expected))
+    }
+
+    fn counter_value(snapshot: &[MetricEntry], name: &str, labels: &[(&str, &str)]) -> u64 {
+        snapshot
+            .iter()
+            .filter_map(|(composite, _unit, _description, value)| {
+                let matches = composite.kind() == MetricKind::Counter
+                    && composite.key().name() == name
+                    && labels_match(composite.key(), labels);
+                match (matches, value) {
+                    (true, DebugValue::Counter(count)) => Some(*count),
+                    _ => None,
+                }
+            })
+            .sum()
+    }
+
+    fn histogram_values(snapshot: &[MetricEntry], name: &str, labels: &[(&str, &str)]) -> Vec<f64> {
+        snapshot
+            .iter()
+            .filter_map(|(composite, _unit, _description, value)| {
+                let matches = composite.kind() == MetricKind::Histogram
+                    && composite.key().name() == name
+                    && labels_match(composite.key(), labels);
+                match (matches, value) {
+                    (true, DebugValue::Histogram(values)) => Some(values),
+                    _ => None,
+                }
+            })
+            .flatten()
+            .map(|value| value.into_inner())
+            .collect()
+    }
+
+    #[test]
+    fn metrics_record_retried_success_with_attempts_and_duration() {
+        let calls_in_test = Arc::new(AtomicU32::new(0));
+        let (snapshot, ()) = record_metrics(move || {
+            Box::pin(async move {
+                let policy = policy_of(1_000, 60_000, 3, 100, 2_000);
+                let cancel = CancellationToken::new();
+                let calls_in_attempt = calls_in_test.clone();
+                execute_with_jitter("metrics_read", OpClass::ReadIdempotent, &policy, &cancel, full_jitter, move || {
+                    let calls = calls_in_attempt.clone();
+                    async move {
+                        if calls.fetch_add(1, Ordering::SeqCst) < 2 {
+                            Err(AttemptError {
+                                class: ErrorClass::RetryableStatus,
+                                error: KmsError::backend_error("throttled (429)"),
+                            })
+                        } else {
+                            Ok(())
+                        }
+                    }
+                })
+                .await
+                .expect("retries within budget must succeed");
+            })
+        });
+
+        assert_eq!(
+            counter_value(
+                &snapshot,
+                METRIC_OPERATIONS_TOTAL,
+                &[
+                    ("operation", "metrics_read"),
+                    ("op_class", "read_idempotent"),
+                    ("outcome", "success")
+                ]
+            ),
+            1
+        );
+        assert_eq!(
+            counter_value(
+                &snapshot,
+                METRIC_ATTEMPT_FAILURES_TOTAL,
+                &[("operation", "metrics_read"), ("error_class", "retryable_status")]
+            ),
+            2
+        );
+        assert_eq!(
+            histogram_values(
+                &snapshot,
+                METRIC_OPERATION_ATTEMPTS,
+                &[("operation", "metrics_read"), ("outcome", "success")]
+            ),
+            vec![3.0]
+        );
+        // Full-cap backoffs of 100ms and 200ms on the paused clock.
+        let durations = histogram_values(
+            &snapshot,
+            METRIC_OPERATION_DURATION_SECONDS,
+            &[("operation", "metrics_read"), ("outcome", "success")],
+        );
+        assert_eq!(durations.len(), 1);
+        assert!((durations[0] - 0.3).abs() < 1e-9, "expected 0.3s of virtual backoff, got {durations:?}");
+    }
+
+    #[test]
+    fn metrics_record_fatal_outcome_with_single_attempt() {
+        let (snapshot, ()) = record_metrics(|| {
+            Box::pin(async {
+                let policy = policy_of(1_000, 60_000, 5, 100, 2_000);
+                let cancel = CancellationToken::new();
+                let result: Result<()> =
+                    execute_with_jitter("metrics_fatal", OpClass::ReadIdempotent, &policy, &cancel, full_jitter, || async {
+                        Err(AttemptError {
+                            class: ErrorClass::Fatal,
+                            error: KmsError::access_denied("permission denied (403)"),
+                        })
+                    })
+                    .await;
+                result.expect_err("a fatal failure must end the operation");
+            })
+        });
+
+        assert_eq!(
+            counter_value(
+                &snapshot,
+                METRIC_OPERATIONS_TOTAL,
+                &[("operation", "metrics_fatal"), ("outcome", "fatal")]
+            ),
+            1
+        );
+        assert_eq!(
+            counter_value(
+                &snapshot,
+                METRIC_ATTEMPT_FAILURES_TOTAL,
+                &[("operation", "metrics_fatal"), ("error_class", "fatal")]
+            ),
+            1
+        );
+        assert_eq!(
+            histogram_values(
+                &snapshot,
+                METRIC_OPERATION_ATTEMPTS,
+                &[("operation", "metrics_fatal"), ("outcome", "fatal")]
+            ),
+            vec![1.0]
+        );
+    }
+
+    #[test]
+    fn metrics_record_mutating_budget_exhausted_after_one_attempt() {
+        let (snapshot, ()) = record_metrics(|| {
+            Box::pin(async {
+                let policy = policy_of(1_000, 60_000, 5, 100, 2_000);
+                let cancel = CancellationToken::new();
+                let result: Result<()> = execute_with_jitter(
+                    "metrics_rotate",
+                    OpClass::MutatingNonIdempotent,
+                    &policy,
+                    &cancel,
+                    full_jitter,
+                    || async { Err(retryable_conn_error()) },
+                )
+                .await;
+                result.expect_err("a mutating operation must not retry a retryable failure");
+            })
+        });
+
+        assert_eq!(
+            counter_value(
+                &snapshot,
+                METRIC_OPERATIONS_TOTAL,
+                &[
+                    ("operation", "metrics_rotate"),
+                    ("op_class", "mutating_non_idempotent"),
+                    ("outcome", "budget_exhausted")
+                ]
+            ),
+            1
+        );
+        assert_eq!(
+            histogram_values(
+                &snapshot,
+                METRIC_OPERATION_ATTEMPTS,
+                &[("operation", "metrics_rotate"), ("outcome", "budget_exhausted")]
+            ),
+            vec![1.0]
+        );
+    }
+
+    #[test]
+    fn metrics_record_timeouts_and_deadline_outcome() {
+        let (snapshot, ()) = record_metrics(|| {
+            Box::pin(async {
+                // Hung attempts: 10s each against a 25s deadline (see
+                // total_duration_never_exceeds_deadline for the timeline).
+                let policy = policy_of(10_000, 25_000, 5, 100, 2_000);
+                let cancel = CancellationToken::new();
+                let result: Result<()> =
+                    execute_with_jitter("metrics_hung", OpClass::ReadIdempotent, &policy, &cancel, full_jitter, || {
+                        std::future::pending::<AttemptResult<()>>()
+                    })
+                    .await;
+                result.expect_err("hung attempts must exhaust the deadline");
+            })
+        });
+
+        assert_eq!(
+            counter_value(
+                &snapshot,
+                METRIC_OPERATIONS_TOTAL,
+                &[("operation", "metrics_hung"), ("outcome", "deadline_exceeded")]
+            ),
+            1
+        );
+        assert_eq!(
+            counter_value(
+                &snapshot,
+                METRIC_ATTEMPT_FAILURES_TOTAL,
+                &[("operation", "metrics_hung"), ("error_class", "attempt_timeout")]
+            ),
+            3
+        );
+        let durations = histogram_values(
+            &snapshot,
+            METRIC_OPERATION_DURATION_SECONDS,
+            &[("operation", "metrics_hung"), ("outcome", "deadline_exceeded")],
+        );
+        assert_eq!(durations.len(), 1);
+        assert!((durations[0] - 25.0).abs() < 1e-9, "expected the full 25s deadline, got {durations:?}");
+    }
+
+    #[test]
+    fn metrics_record_cancelled_outcome() {
+        let calls_in_test = Arc::new(AtomicU32::new(0));
+        let (snapshot, ()) = record_metrics(move || {
+            Box::pin(async move {
+                let policy = policy_of(1_000, 600_000, 5, 10_000, 10_000);
+                let cancel = CancellationToken::new();
+                let canceller = cancel.clone();
+                tokio::spawn(async move {
+                    tokio::time::sleep(Duration::from_millis(500)).await;
+                    canceller.cancel();
+                });
+                let calls_in_attempt = calls_in_test.clone();
+                let result: Result<()> =
+                    execute_with_jitter("metrics_cancel", OpClass::ReadIdempotent, &policy, &cancel, full_jitter, move || {
+                        let calls = calls_in_attempt.clone();
+                        async move {
+                            calls.fetch_add(1, Ordering::SeqCst);
+                            Err(retryable_conn_error())
+                        }
+                    })
+                    .await;
+                result.expect_err("cancellation must abort the backoff");
+            })
+        });
+
+        assert_eq!(
+            counter_value(
+                &snapshot,
+                METRIC_OPERATIONS_TOTAL,
+                &[("operation", "metrics_cancel"), ("outcome", "cancelled")]
+            ),
+            1
+        );
+        assert_eq!(
+            histogram_values(
+                &snapshot,
+                METRIC_OPERATION_ATTEMPTS,
+                &[("operation", "metrics_cancel"), ("outcome", "cancelled")]
+            ),
+            vec![1.0]
+        );
+    }
 }

crates/kms/tests/vault_fault_injection.rs

@@ -0,0 +1,255 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Fault-injection matrix for the Vault backend operation policy.
+//!
+//! Offline cases run against locally injected transport faults (a closed
+//! port, a listener that never responds) — deterministic, no external
+//! dependencies. Real-Vault cases are `#[ignore]`d and need a dev Vault
+//! (default `http://127.0.0.1:8200`, override with `RUSTFS_KMS_VAULT_ADDR`).
+//!
+//! Throttling (429) and recoverable 5xx responses cannot be forced on a stock
+//! dev Vault, so their retry and metric behavior is pinned deterministically
+//! by the scripted-Vault wiring tests in `backends::vault` and the engine
+//! tests in `policy.rs`. Pointing `RUSTFS_KMS_VAULT_ADDR` at a
+//! fault-injecting proxy reuses the ignored cases here unchanged.
+//!
+//! Every case installs a thread-local debugging metrics recorder and drives a
+//! current-thread runtime inside it, so the policy metrics double as the
+//! request-count assertion even against a real server.
+
+use std::time::Duration;
+
+use metrics_util::MetricKind;
+use metrics_util::debugging::{DebugValue, DebuggingRecorder};
+use rustfs_kms::backends::KmsClient;
+use rustfs_kms::backends::vault::VaultKmsClient;
+use rustfs_kms::{KmsConfig, KmsError, VaultAuthMethod, VaultConfig};
+
+const OPERATIONS_TOTAL: &str = "rustfs_kms_backend_operations_total";
+const ATTEMPT_FAILURES_TOTAL: &str = "rustfs_kms_backend_attempt_failures_total";
+
+fn vault_config(address: &str, token: &str) -> VaultConfig {
+    VaultConfig {
+        address: address.to_string(),
+        auth_method: VaultAuthMethod::Token {
+            token: token.to_string(),
+        },
+        namespace: None,
+        mount_path: "transit".to_string(),
+        kv_mount: "secret".to_string(),
+        key_path_prefix: "rustfs/kms/fault-injection".to_string(),
+        tls: None,
+    }
+}
+
+fn kms_config(attempt_timeout: Duration, retry_attempts: u32) -> KmsConfig {
+    KmsConfig {
+        timeout: attempt_timeout,
+        retry_attempts,
+        ..KmsConfig::default()
+    }
+}
+
+type MetricEntry = (
+    metrics_util::CompositeKey,
+    Option<metrics::Unit>,
+    Option<metrics::SharedString>,
+    DebugValue,
+);
+
+/// Run `test` on a current-thread runtime under a debugging metrics recorder
+/// and return one snapshot of everything it emitted.
+///
+/// A single snapshot per test on purpose: `Snapshotter::snapshot` drains the
+/// recorded state, so taking it per assertion would only show the first
+/// assertion any data.
+fn record_metrics(test: impl FnOnce() -> std::pin::Pin<Box<dyn std::future::Future<Output = ()>>>) -> Vec<MetricEntry> {
+    let recorder = DebuggingRecorder::new();
+    let snapshotter = recorder.snapshotter();
+    metrics::with_local_recorder(&recorder, || {
+        let runtime = tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()
+            .expect("current-thread runtime must build");
+        runtime.block_on(test());
+    });
+    snapshotter.snapshot().into_vec()
+}
+
+/// Sum of counters with `name` whose labels include every `(key, value)` pair.
+fn counter_value(snapshot: &[MetricEntry], name: &str, labels: &[(&str, &str)]) -> u64 {
+    snapshot
+        .iter()
+        .filter_map(|(composite, _unit, _description, value)| {
+            let key = composite.key();
+            let matches = composite.kind() == MetricKind::Counter
+                && key.name() == name
+                && labels
+                    .iter()
+                    .all(|(label, expected)| key.labels().any(|l| l.key() == *label && l.value() == *expected));
+            match (matches, value) {
+                (true, DebugValue::Counter(count)) => Some(*count),
+                _ => None,
+            }
+        })
+        .sum()
+}
+
+/// Connection refused: connection-class failures are retried up to the
+/// configured budget, then surface as a backend error.
+#[test]
+fn connection_refused_is_retried_within_budget() {
+    // Reserve a loopback port and release it so nothing is listening there.
+    let listener = std::net::TcpListener::bind("127.0.0.1:0").expect("reserve a loopback port");
+    let address = format!("http://{}", listener.local_addr().expect("reserved port addr"));
+    drop(listener);
+
+    let snapshot = record_metrics(|| {
+        Box::pin(async move {
+            let client = VaultKmsClient::new(vault_config(&address, "unused"), &kms_config(Duration::from_secs(2), 2))
+                .await
+                .expect("client construction performs no network calls");
+            let error = client
+                .describe_key("fault-injection-refused", None)
+                .await
+                .expect_err("a refused connection must fail the operation");
+            assert!(matches!(error, KmsError::BackendError { .. }), "got {error:?}");
+        })
+    });
+
+    assert_eq!(
+        counter_value(&snapshot, ATTEMPT_FAILURES_TOTAL, &[("error_class", "retryable_conn")]),
+        2,
+        "both budgeted attempts must observe the refused connection"
+    );
+    assert_eq!(counter_value(&snapshot, OPERATIONS_TOTAL, &[("outcome", "budget_exhausted")]), 1);
+    // The static-token login records its own success; the Vault read must not.
+    assert_eq!(
+        counter_value(
+            &snapshot,
+            OPERATIONS_TOTAL,
+            &[("operation", "vault_kv2_read_key"), ("outcome", "success")]
+        ),
+        0
+    );
+}
+
+/// Stalled connection: a server that accepts but never responds is cut off by
+/// the per-attempt timeout (either the policy timer or the equally sized HTTP
+/// client timeout, whichever fires first) instead of hanging forever.
+#[test]
+fn stalled_connection_is_cut_off_by_the_attempt_timeout() {
+    let snapshot = record_metrics(|| {
+        Box::pin(async move {
+            let listener = tokio::net::TcpListener::bind("127.0.0.1:0")
+                .await
+                .expect("bind stall listener");
+            let address = format!("http://{}", listener.local_addr().expect("stall listener addr"));
+            // Accept and park every connection without ever responding.
+            tokio::spawn(async move {
+                let mut parked = Vec::new();
+                loop {
+                    let Ok((socket, _)) = listener.accept().await else { return };
+                    parked.push(socket);
+                }
+            });
+
+            let client = VaultKmsClient::new(vault_config(&address, "unused"), &kms_config(Duration::from_millis(250), 1))
+                .await
+                .expect("client construction performs no network calls");
+            let error = client
+                .describe_key("fault-injection-stalled", None)
+                .await
+                .expect_err("a stalled request must be cut off by the attempt timeout");
+            assert!(
+                matches!(error, KmsError::OperationTimedOut { .. } | KmsError::BackendError { .. }),
+                "got {error:?}"
+            );
+        })
+    });
+
+    // The policy timer reports attempt_timeout; the client-level HTTP timeout
+    // surfaces as a connection-class failure. Either way it is exactly one
+    // attempt that was cut off.
+    let cut_off = counter_value(&snapshot, ATTEMPT_FAILURES_TOTAL, &[("error_class", "attempt_timeout")])
+        + counter_value(&snapshot, ATTEMPT_FAILURES_TOTAL, &[("error_class", "retryable_conn")]);
+    assert_eq!(cut_off, 1, "the single budgeted attempt must be cut off by a timeout");
+    assert_eq!(counter_value(&snapshot, OPERATIONS_TOTAL, &[("outcome", "budget_exhausted")]), 1);
+}
+
+fn real_vault_address() -> String {
+    std::env::var("RUSTFS_KMS_VAULT_ADDR").unwrap_or_else(|_| "http://127.0.0.1:8200".to_string())
+}
+
+/// Invalid token against a real Vault: the 403 is fatal — exactly one
+/// attempt, no retry, and the operation fails closed.
+#[test]
+#[ignore] // Requires a running Vault dev server
+fn real_vault_invalid_token_is_fatal_and_never_retried() {
+    let snapshot = record_metrics(|| {
+        Box::pin(async {
+            let config = vault_config(&real_vault_address(), "fault-injection-invalid-token");
+            let client = VaultKmsClient::new(config, &kms_config(Duration::from_secs(5), 3))
+                .await
+                .expect("client construction performs no network calls");
+            let error = client
+                .describe_key("fault-injection-forbidden", None)
+                .await
+                .expect_err("an invalid token must be rejected");
+            assert!(matches!(error, KmsError::BackendError { .. }), "got {error:?}");
+        })
+    });
+
+    assert_eq!(
+        counter_value(&snapshot, ATTEMPT_FAILURES_TOTAL, &[("error_class", "fatal")]),
+        1,
+        "a 403 must be observed by exactly one attempt"
+    );
+    assert_eq!(counter_value(&snapshot, OPERATIONS_TOTAL, &[("outcome", "fatal")]), 1);
+    assert_eq!(
+        counter_value(&snapshot, ATTEMPT_FAILURES_TOTAL, &[("error_class", "retryable_status")]),
+        0,
+        "an auth failure must never be classified as retryable"
+    );
+}
+
+/// Healthy read against a real Vault: a missing key resolves in one attempt
+/// (404 is fatal for retry purposes) and records a fatal outcome rather than
+/// burning the retry budget.
+#[test]
+#[ignore] // Requires a running Vault dev server
+fn real_vault_missing_key_is_resolved_in_one_attempt() {
+    let token = std::env::var("RUSTFS_KMS_VAULT_TOKEN").unwrap_or_else(|_| "dev-only-token".to_string());
+    let snapshot = record_metrics(|| {
+        Box::pin(async move {
+            let config = vault_config(&real_vault_address(), &token);
+            let client = VaultKmsClient::new(config, &kms_config(Duration::from_secs(5), 3))
+                .await
+                .expect("client construction performs no network calls");
+            let error = client
+                .describe_key("fault-injection-definitely-missing", None)
+                .await
+                .expect_err("a missing key must resolve to key-not-found");
+            assert!(matches!(error, KmsError::KeyNotFound { .. }), "got {error:?}");
+        })
+    });
+
+    assert_eq!(
+        counter_value(&snapshot, ATTEMPT_FAILURES_TOTAL, &[("error_class", "fatal")]),
+        1,
+        "a 404 must be observed by exactly one attempt"
+    );
+    assert_eq!(counter_value(&snapshot, OPERATIONS_TOTAL, &[("outcome", "fatal")]), 1);
+}

crates/lifecycle/Cargo.toml

@@ -25,7 +25,35 @@ keywords = ["lifecycle", "storage", "rustfs", "Minio"]
 categories = ["web-programming", "development-tools", "filesystem"]
 documentation = "https://docs.rs/rustfs-lifecycle/latest/rustfs_lifecycle/"
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "rustfs-common/hotpath",
+    "rustfs-config/hotpath",
+    "rustfs-replication/hotpath",
+    "rustfs-storage-api/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-replication/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-replication/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 async-trait.workspace = true
 metrics.workspace = true
 rustfs-common.workspace = true

crates/lock/Cargo.toml

@@ -28,7 +28,21 @@ documentation = "https://docs.rs/rustfs-lock/latest/rustfs_lock/"
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/parking_lot",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-io-metrics/hotpath-alloc", "rustfs-utils/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-io-metrics/hotpath-cpu", "rustfs-utils/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-io-metrics = { workspace = true }
 rustfs-utils = { workspace = true }
 async-trait.workspace = true

crates/lock/src/distributed_lock.rs

@@ -540,6 +540,7 @@ impl DistributedLock {
     }
 
     /// Acquire a lock and return a RAII guard
+    #[hotpath::measure]
     pub(crate) async fn acquire_guard(&self, request: &LockRequest) -> Result<Option<DistributedLockGuard>> {
         if self.clients.is_empty() {
             return Err(LockError::internal("No lock clients available"));
@@ -626,6 +627,7 @@ impl DistributedLock {
     }
 
     /// Convenience: acquire exclusive lock as a guard
+    #[hotpath::measure]
     pub async fn lock_guard(
         &self,
         resource: ObjectKey,
@@ -640,6 +642,7 @@ impl DistributedLock {
     }
 
     /// Convenience: acquire exclusive lock with expected contention logs suppressed
+    #[hotpath::measure]
     pub async fn lock_guard_quiet(
         &self,
         resource: ObjectKey,
@@ -655,6 +658,7 @@ impl DistributedLock {
     }
 
     /// Convenience: acquire shared lock as a guard
+    #[hotpath::measure]
     pub async fn rlock_guard(
         &self,
         resource: ObjectKey,

crates/log-analyzer/Cargo.toml

@@ -32,7 +32,14 @@ doctest = false
 name = "la-dump-anchors"
 path = "src/bin/la_dump_anchors.rs"
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 chrono = { workspace = true, features = ["serde"] }
 flate2 = { workspace = true }
 regex = { workspace = true }

crates/madmin/Cargo.toml

@@ -28,7 +28,14 @@ documentation = "https://docs.rs/rustfs-madmin/latest/rustfs_madmin/"
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 chrono = { workspace = true, features = ["serde"] }
 humantime.workspace = true
 hyper = { workspace = true, features = ["http2", "http1", "server"] }

crates/notify/Cargo.toml

@@ -26,9 +26,40 @@ categories = ["web-programming", "development-tools", "filesystem"]
 documentation = "https://docs.rs/rustfs-notify/latest/rustfs_notify/"
 
 [features]
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "rustfs-config/hotpath",
+    "rustfs-ecstore/hotpath",
+    "rustfs-s3-ops/hotpath",
+    "rustfs-s3-types/hotpath",
+    "rustfs-targets/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-ecstore/hotpath-alloc",
+    "rustfs-s3-ops/hotpath-alloc",
+    "rustfs-s3-types/hotpath-alloc",
+    "rustfs-targets/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-ecstore/hotpath-cpu",
+    "rustfs-s3-ops/hotpath-cpu",
+    "rustfs-s3-types/hotpath-cpu",
+    "rustfs-targets/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
 demo-examples = []
 
 [dependencies]
+hotpath.workspace = true
 rustfs-config = { workspace = true, features = ["notify", "server-config-model"] }
 rustfs-ecstore = { workspace = true }
 rustfs-s3-types = { workspace = true }

crates/object-capacity/Cargo.toml

@@ -34,7 +34,33 @@ harness = false
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "rustfs-config/hotpath",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-io-metrics/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-io-metrics/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-config = { workspace = true, features = ["constants"] }
 rustfs-io-metrics = { workspace = true }
 rustfs-utils = { workspace = true, features = ["os"] }

crates/object-capacity/src/capacity_manager.rs

@@ -1035,6 +1035,7 @@ impl HybridCapacityManager {
     ///
     /// Joiners subscribe to the watch channel *before* releasing the mutex, which guarantees
     /// they cannot miss the completion notification even if the leader finishes very quickly.
+    #[hotpath::measure]
     pub async fn refresh_or_join<F, Fut>(&self, source: DataSource, refresh_fn: F) -> Result<CapacityUpdate, String>
     where
         F: FnOnce() -> Fut,
@@ -1142,6 +1143,7 @@ impl HybridCapacityManager {
     }
 
     /// Start a background refresh if one is not already in flight.
+    #[hotpath::measure]
     pub async fn spawn_refresh_if_needed<F, Fut>(self: Arc<Self>, source: DataSource, refresh_fn: F) -> bool
     where
         F: FnOnce() -> Fut + Send + 'static,

crates/object-capacity/src/scan.rs

@@ -338,6 +338,7 @@ pub async fn select_capacity_refresh_disks(
     }
 }
 
+#[hotpath::measure]
 pub async fn refresh_capacity_with_scope(disks: Vec<CapacityDiskRef>, dirty_subset: bool) -> Result<CapacityUpdate, String> {
     let scan_started_at = Instant::now();
     let report = calculate_data_dir_used_capacity_report(&disks)

crates/object-data-cache/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["web-programming", "development-tools"]
 [lib]
 doctest = false
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "hotpath/tokio"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 bytes = { workspace = true, features = ["serde"] }
 metrics = { workspace = true }
 moka = { workspace = true, features = ["future"] }

crates/obs/Cargo.toml

@@ -27,6 +27,50 @@ documentation = "https://docs.rs/rustfs-obs/latest/rustfs_obs/"
 
 [features]
 default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/crossbeam",
+    "rustfs-audit/hotpath",
+    "rustfs-common/hotpath",
+    "rustfs-config/hotpath",
+    "rustfs-ecstore/hotpath",
+    "rustfs-iam/hotpath",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-notify/hotpath",
+    "rustfs-security-governance/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-audit/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-ecstore/hotpath-alloc",
+    "rustfs-iam/hotpath-alloc",
+    "rustfs-io-metrics/hotpath-alloc",
+    "rustfs-notify/hotpath-alloc",
+    "rustfs-security-governance/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-audit/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-ecstore/hotpath-cpu",
+    "rustfs-iam/hotpath-cpu",
+    "rustfs-io-metrics/hotpath-cpu",
+    "rustfs-notify/hotpath-cpu",
+    "rustfs-security-governance/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
 # Tokio runtime-level telemetry. Requires a `--cfg tokio_unstable` build; the
 # build script fails the compile when that flag is missing. Off by default so
 # ordinary builds neither pay for nor depend on Tokio's unstable API.
@@ -58,6 +102,7 @@ required-features = ["dial9"]
 workspace = true
 
 [dependencies]
+hotpath.workspace = true
 rustfs-audit = { workspace = true }
 rustfs-common = { workspace = true }
 rustfs-config = { workspace = true, features = ["observability"] }

crates/policy/Cargo.toml

@@ -30,9 +30,27 @@ workspace = true
 
 [features]
 default = []
-hotpath = ["hotpath/hotpath", "hotpath/reqwest-0-13"]
+hotpath = [
-hotpath-alloc = ["hotpath/hotpath-alloc"]
+    "hotpath/hotpath",
-hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+    "hotpath/reqwest-0-13",
+    "rustfs-config/hotpath",
+    "rustfs-credentials/hotpath",
+    "rustfs-crypto/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-credentials/hotpath-alloc",
+    "rustfs-crypto/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-credentials/hotpath-cpu",
+    "rustfs-crypto/hotpath-cpu",
+]
 
 [dependencies]
 rustfs-credentials = { workspace = true }

crates/protocols/Cargo.toml

@@ -30,6 +30,55 @@ workspace = true
 
 [features]
 default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "rustfs-config/hotpath",
+    "rustfs-credentials/hotpath",
+    "rustfs-ecstore?/hotpath",
+    "rustfs-iam/hotpath",
+    "rustfs-keystone?/hotpath",
+    "rustfs-policy/hotpath",
+    "rustfs-rio?/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-tls-runtime?/hotpath",
+    "rustfs-trusted-proxies?/hotpath",
+    "rustfs-utils/hotpath",
+    "rustfs-test-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-credentials/hotpath-alloc",
+    "rustfs-ecstore?/hotpath-alloc",
+    "rustfs-iam/hotpath-alloc",
+    "rustfs-keystone?/hotpath-alloc",
+    "rustfs-policy/hotpath-alloc",
+    "rustfs-rio?/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-tls-runtime?/hotpath-alloc",
+    "rustfs-trusted-proxies?/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+    "rustfs-test-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-credentials/hotpath-cpu",
+    "rustfs-ecstore?/hotpath-cpu",
+    "rustfs-iam/hotpath-cpu",
+    "rustfs-keystone?/hotpath-cpu",
+    "rustfs-policy/hotpath-cpu",
+    "rustfs-rio?/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-tls-runtime?/hotpath-cpu",
+    "rustfs-trusted-proxies?/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+    "rustfs-test-utils/hotpath-cpu",
+]
 ftps = ["dep:libunftp", "dep:unftp-core", "dep:rustls", "dep:rustfs-tls-runtime", "dep:subtle"]
 swift = [
     "dep:rustfs-keystone",
@@ -62,6 +111,7 @@ webdav = ["dep:dav-server", "dep:hyper", "dep:hyper-util", "dep:http-body-util",
 sftp = ["dep:russh", "dep:russh-sftp", "dep:uuid", "dep:subtle", "dep:tokio-util", "dep:socket2"]
 
 [dependencies]
+hotpath.workspace = true
 # Core RustFS dependencies
 rustfs-iam = { workspace = true }
 rustfs-credentials = { workspace = true }

crates/protos/Cargo.toml

@@ -32,7 +32,38 @@ workspace = true
 name = "gproto"
 path = "src/main.rs"
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "rustfs-common/hotpath",
+    "rustfs-config/hotpath",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-tls-runtime/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-io-metrics/hotpath-alloc",
+    "rustfs-tls-runtime/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-io-metrics/hotpath-cpu",
+    "rustfs-tls-runtime/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-common.workspace = true
 rustfs-io-metrics.workspace = true
 rustfs-config.workspace = true

crates/replication/Cargo.toml

@@ -25,7 +25,14 @@ keywords = ["replication", "storage", "rustfs", "Minio"]
 categories = ["web-programming", "development-tools", "filesystem"]
 documentation = "https://docs.rs/rustfs-replication/latest/rustfs_replication/"
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "hotpath/tokio"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 bytes = { workspace = true, features = ["serde"] }
 byteorder.workspace = true
 regex.workspace = true

crates/rio-v2/Cargo.toml

@@ -28,7 +28,32 @@ documentation = "https://docs.rs/rustfs-rio-v2/latest/rustfs_rio_v2/"
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "rustfs-rio/hotpath",
+    "rustfs-utils/hotpath",
+    "rustfs-filemeta/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-rio/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+    "rustfs-filemeta/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-rio/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+    "rustfs-filemeta/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 aes-gcm = { workspace = true, features = ["rand_core"] }
 bytes = { workspace = true, features = ["serde"] }
 chacha20poly1305.workspace = true

crates/rio/Cargo.toml

@@ -30,9 +30,32 @@ workspace = true
 
 [features]
 default = []
-hotpath = ["hotpath/hotpath", "hotpath/tokio", "hotpath/futures", "hotpath/reqwest-0-13"]
+hotpath = [
-hotpath-alloc = ["hotpath/hotpath-alloc"]
+    "hotpath/hotpath",
-hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/reqwest-0-13",
+    "rustfs-config/hotpath",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-tls-runtime/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-io-metrics/hotpath-alloc",
+    "rustfs-tls-runtime/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-io-metrics/hotpath-cpu",
+    "rustfs-tls-runtime/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
 
 [dependencies]
 hotpath.workspace = true

crates/s3-ops/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["data-structures"]
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "rustfs-s3-types/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-s3-types/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-s3-types/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-s3-types = { workspace = true }
 
 [lib]

crates/s3-types/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["data-structures"]
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true, features = ["raw_value"] }
 

crates/s3select-api/Cargo.toml

@@ -28,7 +28,37 @@ documentation = "https://docs.rs/rustfs-s3select-api/latest/rustfs_s3select_api/
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/parking_lot",
+    "rustfs-common/hotpath",
+    "rustfs-ecstore/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-test-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-ecstore/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-test-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-ecstore/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-test-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 metrics = { workspace = true }
 async-trait.workspace = true
 bytes = { workspace = true, features = ["serde"] }

crates/s3select-query/Cargo.toml

@@ -28,7 +28,20 @@ documentation = "https://docs.rs/rustfs-s3select-query/latest/rustfs_s3select_qu
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/parking_lot",
+    "rustfs-s3select-api/hotpath",
+]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-s3select-api/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-s3select-api/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-s3select-api = { workspace = true }
 async-recursion = { workspace = true }
 async-trait.workspace = true

crates/scanner/Cargo.toml

@@ -29,7 +29,48 @@ documentation = "https://docs.rs/rustfs-scanner/latest/rustfs_scanner/"
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "rustfs-common/hotpath",
+    "rustfs-config/hotpath",
+    "rustfs-credentials/hotpath",
+    "rustfs-data-usage/hotpath",
+    "rustfs-ecstore/hotpath",
+    "rustfs-filemeta/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-credentials/hotpath-alloc",
+    "rustfs-data-usage/hotpath-alloc",
+    "rustfs-ecstore/hotpath-alloc",
+    "rustfs-filemeta/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-credentials/hotpath-cpu",
+    "rustfs-data-usage/hotpath-cpu",
+    "rustfs-ecstore/hotpath-cpu",
+    "rustfs-filemeta/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-config = { workspace = true, features = ["server-config-model"] }
 rustfs-common = { workspace = true }
 rustfs-credentials = { workspace = true }

crates/scanner/src/scanner.rs

@@ -2531,6 +2531,7 @@ where
 }
 
 #[instrument(skip_all)]
+#[hotpath::measure]
 async fn run_data_scanner_cycle(
     ctx: &CancellationToken,
     storeapi: &Arc<ECStore>,

crates/security-governance/Cargo.toml

@@ -30,5 +30,12 @@ doctest = false
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 thiserror = { workspace = true }

crates/signer/Cargo.toml

@@ -25,7 +25,14 @@ keywords = ["digital-signature", "verification", "integrity", "rustfs", "Minio"]
 categories = ["web-programming", "development-tools", "cryptography"]
 documentation = "https://docs.rs/rustfs-signer/latest/rustfs_signer/"
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "rustfs-utils/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-utils/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-utils/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 tracing.workspace = true
 bytes = { workspace = true, features = ["serde"] }
 http.workspace = true

crates/storage-api/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["web-programming", "development-tools", "filesystem"]
 [lib]
 doctest = false
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "hotpath/tokio", "rustfs-filemeta/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-filemeta/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-filemeta/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 async-trait.workspace = true
 # Storage-facing replication contracts are isolated in src/replication.rs until
 # the underlying wire types can move without creating a replication/storage-api cycle.

crates/targets/Cargo.toml

@@ -11,7 +11,41 @@ keywords = ["file-system", "notification", "target", "rustfs", "Minio"]
 categories = ["web-programming", "development-tools", "filesystem"]
 documentation = "https://docs.rs/rustfs-targets/latest/rustfs_targets/"
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/parking_lot",
+    "hotpath/reqwest-0-13",
+    "rustfs-config/hotpath",
+    "rustfs-extension-schema/hotpath",
+    "rustfs-s3-types/hotpath",
+    "rustfs-tls-runtime/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-extension-schema/hotpath-alloc",
+    "rustfs-s3-types/hotpath-alloc",
+    "rustfs-tls-runtime/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-extension-schema/hotpath-cpu",
+    "rustfs-s3-types/hotpath-cpu",
+    "rustfs-tls-runtime/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-config = { workspace = true, features = ["notify", "audit", "server-config-model"] }
 rustfs-extension-schema = { workspace = true }
 rustfs-tls-runtime = { workspace = true }

crates/targets/src/runtime/mod.rs

@@ -522,6 +522,7 @@ fn snapshot_from_delivery(target_id: TargetID, delivery: TargetDeliverySnapshot)
     }
 }
 
+#[hotpath::measure]
 pub async fn init_target_and_optionally_start_replay<E, F, G>(
     target: Box<dyn Target<E> + Send + Sync>,
     on_replay_start: F,
@@ -557,6 +558,7 @@ where
     Some((shared, cancel))
 }
 
+#[hotpath::measure]
 pub(crate) async fn prepare_target<E>(
     target: Box<dyn Target<E> + Send + Sync>,
     cancellation: Option<&CancellationToken>,
@@ -598,6 +600,7 @@ where
 
 type ActivatedTarget<E> = (SharedTarget<E>, Option<(mpsc::Sender<()>, JoinHandle<()>)>);
 
+#[hotpath::measure]
 pub async fn activate_targets_with_replay<E, F, Fut>(
     targets: Vec<Box<dyn Target<E> + Send + Sync>>,
     mut activate_one: F,
@@ -670,6 +673,7 @@ fn seed_interval_start(now: tokio::time::Instant, interval: Duration) -> tokio::
     now.checked_sub(interval).unwrap_or(now)
 }
 
+#[hotpath::measure]
 async fn stream_replay_worker<E>(
     store: &mut (dyn Store<QueuedPayload, Error = StoreError, Key = Key> + Send),
     target: SharedTarget<E>,
@@ -805,6 +809,7 @@ async fn stream_replay_worker<E>(
 /// Returns `true` if a cancel signal was observed while processing (e.g. during
 /// retry backoff), so the caller can stop promptly instead of continuing to
 /// drain a store that a replacement worker may already own.
+#[hotpath::measure]
 async fn process_replay_batch<E>(
     store: &(dyn Store<QueuedPayload, Error = StoreError, Key = Key> + Send),
     batch_keys: &mut Vec<Key>,

crates/targets/src/target/webhook.rs

@@ -85,6 +85,7 @@ fn classify_probe_error(err: &reqwest::Error) -> TargetHealthReason {
     TargetHealthReason::Unreachable
 }
 
+#[hotpath::measure]
 async fn probe_health_url(client: &Client, health_check_url: &Url) -> TargetHealth {
     match tokio::time::timeout(WEBHOOK_HEALTH_TIMEOUT, client.head(health_check_url.as_str()).send()).await {
         Ok(Ok(_)) => TargetHealth::online(TargetHealthReason::Reachable),
@@ -480,6 +481,7 @@ where
         build_queued_payload(event)
     }
 
+    #[hotpath::measure]
     async fn send_body(&self, body: Vec<u8>, meta: &QueuedPayloadMeta) -> Result<(), TargetError> {
         debug!(
             event = EVENT_WEBHOOK_DELIVERY_STATE,

crates/test-utils/Cargo.toml

@@ -25,7 +25,32 @@ keywords = ["testing", "storage", "rustfs", "Minio"]
 categories = ["development-tools", "filesystem"]
 documentation = "https://docs.rs/rustfs-test-utils/latest/rustfs_test_utils/"
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "rustfs-ecstore/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-data-usage/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-ecstore/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-data-usage/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-ecstore/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-data-usage/hotpath-cpu",
+]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-ecstore = { workspace = true }
 rustfs-storage-api = { workspace = true }
 tokio = { workspace = true, features = ["fs", "rt-multi-thread"] }

crates/tls-runtime/Cargo.toml

@@ -27,7 +27,14 @@ categories = ["network-programming", "web-programming", "development-tools"]
 [lints]
 workspace = true
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "hotpath/tokio", "rustfs-common/hotpath", "rustfs-config/hotpath"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-common/hotpath-alloc", "rustfs-config/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-common/hotpath-cpu", "rustfs-config/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 rustfs-common.workspace = true
 rustfs-config.workspace = true
 arc-swap.workspace = true

crates/trusted-proxies/Cargo.toml

@@ -24,7 +24,20 @@ description = " RustFS Trusted Proxies module provides secure and efficient mana
 keywords = ["trusted-proxies", "network-security", "rustfs", "proxy-management"]
 categories = ["network-programming", "security", "web-programming"]
 
+[features]
+default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/reqwest-0-13",
+    "rustfs-config/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc", "rustfs-config/hotpath-alloc", "rustfs-utils/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-config/hotpath-cpu", "rustfs-utils/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 async-trait = { workspace = true }
 axum = { workspace = true }
 http = { workspace = true }

crates/trusted-proxies/src/cloud/ranges.rs

@@ -227,6 +227,7 @@ pub struct GoogleCloudIpRanges;
 
 impl GoogleCloudIpRanges {
     /// Fetches the latest Google Cloud IP ranges from their official source.
+    #[hotpath::measure]
     pub async fn fetch() -> Result<Vec<IpNetwork>, AppError> {
         let client = Client::builder()
             .timeout(Duration::from_secs(10))

crates/utils/Cargo.toml

@@ -25,6 +25,7 @@ keywords = ["utilities", "hashing", "compression", "network", "rustfs"]
 categories = ["web-programming", "development-tools", "cryptography"]
 
 [dependencies]
+hotpath.workspace = true
 base64-simd = { workspace = true, optional = true }
 blake2 = { workspace = true, optional = true }
 brotli = { workspace = true, optional = true }
@@ -76,6 +77,9 @@ workspace = true
 
 [features]
 default = ["ip"]  # features that are enabled by default
+hotpath = ["hotpath/hotpath", "hotpath/tokio", "hotpath/futures", "hotpath/reqwest-0-13"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
 ip = ["dep:local-ip-address"]  # ip characteristics and their dependencies
 net = ["ip", "dep:url", "dep:netif", "dep:futures", "dep:transform-stream", "dep:bytes", "dep:hyper", "dep:tokio"]  # network features with DNS resolver
 egress = ["ip", "dep:reqwest", "dep:tokio", "dep:url"]

crates/zip/Cargo.toml

@@ -32,7 +32,14 @@ doctest = false
 name = "zip_benchmark"
 harness = false
 
+[features]
+default = []
+hotpath = ["hotpath/hotpath", "hotpath/tokio"]
+hotpath-alloc = ["hotpath", "hotpath/hotpath-alloc"]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+
 [dependencies]
+hotpath.workspace = true
 async-compression = { workspace = true, features = [
     "tokio",
     "bzip2",

rustfs/Cargo.toml

@@ -60,25 +60,137 @@ hotpath = [
     "hotpath/crossbeam",
     "hotpath/parking_lot",
     "hotpath/reqwest-0-13",
+    "rustfs-audit/hotpath",
+    "rustfs-common/hotpath",
+    "rustfs-concurrency/hotpath",
+    "rustfs-config/hotpath",
+    "rustfs-credentials/hotpath",
+    "rustfs-crypto/hotpath",
+    "rustfs-data-usage/hotpath",
     "rustfs-ecstore/hotpath",
+    "rustfs-extension-schema/hotpath",
     "rustfs-filemeta/hotpath",
+    "rustfs-heal/hotpath",
+    "rustfs-iam/hotpath",
+    "rustfs-io-core/hotpath",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-keystone/hotpath",
+    "rustfs-kms/hotpath",
+    "rustfs-lock/hotpath",
+    "rustfs-log-analyzer/hotpath",
+    "rustfs-madmin/hotpath",
+    "rustfs-notify/hotpath",
+    "rustfs-object-capacity/hotpath",
+    "rustfs-object-data-cache/hotpath",
+    "rustfs-obs/hotpath",
     "rustfs-policy/hotpath",
+    "rustfs-protocols/hotpath",
+    "rustfs-protos/hotpath",
     "rustfs-rio/hotpath",
+    "rustfs-s3-ops/hotpath",
+    "rustfs-s3-types/hotpath",
+    "rustfs-s3select-api/hotpath",
+    "rustfs-s3select-query/hotpath",
+    "rustfs-scanner/hotpath",
+    "rustfs-security-governance/hotpath",
+    "rustfs-signer/hotpath",
+    "rustfs-storage-api/hotpath",
+    "rustfs-targets/hotpath",
+    "rustfs-tls-runtime/hotpath",
+    "rustfs-trusted-proxies/hotpath",
+    "rustfs-utils/hotpath",
+    "rustfs-zip/hotpath",
+    "rustfs-test-utils/hotpath",
 ]
 hotpath-alloc = [
+    "hotpath",
     "hotpath/hotpath-alloc",
+    "rustfs-audit/hotpath-alloc",
+    "rustfs-common/hotpath-alloc",
+    "rustfs-concurrency/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-credentials/hotpath-alloc",
+    "rustfs-crypto/hotpath-alloc",
+    "rustfs-data-usage/hotpath-alloc",
     "rustfs-ecstore/hotpath-alloc",
+    "rustfs-extension-schema/hotpath-alloc",
     "rustfs-filemeta/hotpath-alloc",
+    "rustfs-heal/hotpath-alloc",
+    "rustfs-iam/hotpath-alloc",
+    "rustfs-io-core/hotpath-alloc",
+    "rustfs-io-metrics/hotpath-alloc",
+    "rustfs-keystone/hotpath-alloc",
+    "rustfs-kms/hotpath-alloc",
+    "rustfs-lock/hotpath-alloc",
+    "rustfs-log-analyzer/hotpath-alloc",
+    "rustfs-madmin/hotpath-alloc",
+    "rustfs-notify/hotpath-alloc",
+    "rustfs-object-capacity/hotpath-alloc",
+    "rustfs-object-data-cache/hotpath-alloc",
+    "rustfs-obs/hotpath-alloc",
     "rustfs-policy/hotpath-alloc",
+    "rustfs-protocols/hotpath-alloc",
+    "rustfs-protos/hotpath-alloc",
     "rustfs-rio/hotpath-alloc",
+    "rustfs-s3-ops/hotpath-alloc",
+    "rustfs-s3-types/hotpath-alloc",
+    "rustfs-s3select-api/hotpath-alloc",
+    "rustfs-s3select-query/hotpath-alloc",
+    "rustfs-scanner/hotpath-alloc",
+    "rustfs-security-governance/hotpath-alloc",
+    "rustfs-signer/hotpath-alloc",
+    "rustfs-storage-api/hotpath-alloc",
+    "rustfs-targets/hotpath-alloc",
+    "rustfs-tls-runtime/hotpath-alloc",
+    "rustfs-trusted-proxies/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+    "rustfs-zip/hotpath-alloc",
+    "rustfs-test-utils/hotpath-alloc",
 ]
 hotpath-cpu = [
     "hotpath",
     "hotpath/hotpath-cpu",
+    "rustfs-audit/hotpath-cpu",
+    "rustfs-common/hotpath-cpu",
+    "rustfs-concurrency/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-credentials/hotpath-cpu",
+    "rustfs-crypto/hotpath-cpu",
+    "rustfs-data-usage/hotpath-cpu",
     "rustfs-ecstore/hotpath-cpu",
+    "rustfs-extension-schema/hotpath-cpu",
     "rustfs-filemeta/hotpath-cpu",
+    "rustfs-heal/hotpath-cpu",
+    "rustfs-iam/hotpath-cpu",
+    "rustfs-io-core/hotpath-cpu",
+    "rustfs-io-metrics/hotpath-cpu",
+    "rustfs-keystone/hotpath-cpu",
+    "rustfs-kms/hotpath-cpu",
+    "rustfs-lock/hotpath-cpu",
+    "rustfs-log-analyzer/hotpath-cpu",
+    "rustfs-madmin/hotpath-cpu",
+    "rustfs-notify/hotpath-cpu",
+    "rustfs-object-capacity/hotpath-cpu",
+    "rustfs-object-data-cache/hotpath-cpu",
+    "rustfs-obs/hotpath-cpu",
     "rustfs-policy/hotpath-cpu",
+    "rustfs-protocols/hotpath-cpu",
+    "rustfs-protos/hotpath-cpu",
     "rustfs-rio/hotpath-cpu",
+    "rustfs-s3-ops/hotpath-cpu",
+    "rustfs-s3-types/hotpath-cpu",
+    "rustfs-s3select-api/hotpath-cpu",
+    "rustfs-s3select-query/hotpath-cpu",
+    "rustfs-scanner/hotpath-cpu",
+    "rustfs-security-governance/hotpath-cpu",
+    "rustfs-signer/hotpath-cpu",
+    "rustfs-storage-api/hotpath-cpu",
+    "rustfs-targets/hotpath-cpu",
+    "rustfs-tls-runtime/hotpath-cpu",
+    "rustfs-trusted-proxies/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+    "rustfs-zip/hotpath-cpu",
+    "rustfs-test-utils/hotpath-cpu",
 ]
 
 [lints]

scripts/run_hotpath_warp_abba.sh

@@ -0,0 +1,428 @@
+#!/usr/bin/env bash
+# Formal Linux / production-cluster ABBA runner for the hotpath warp matrix.
+#
+# This script is intentionally a thin orchestrator around the existing
+# run_object_batch_bench_enhanced.sh load driver and hotpath_warp_ab_gate.sh
+# relative-budget gate. It runs each durability/workload cell as:
+#
+#   A1 baseline -> B1 candidate -> B2 candidate -> A2 baseline
+#
+# Candidate legs are compared against A1. The final A2 leg is also compared
+# against A1 to quantify baseline drift separately from candidate deltas.
+
+set -euo pipefail
+
+PROJECT_ROOT="$(git rev-parse --show-toplevel)"
+ENHANCED_BENCH="${PROJECT_ROOT}/scripts/run_object_batch_bench_enhanced.sh"
+GATE="${PROJECT_ROOT}/scripts/hotpath_warp_ab_gate.sh"
+
+BASELINE_BIN=""
+CANDIDATE_BIN=""
+ENDPOINT=""
+DEPLOY_HOOK=""
+HEALTH_PATH="/health"
+ADDRESS="127.0.0.1:9000"
+DATA_ROOT="/tmp/rustfs-hotpath-abba"
+DISKS=4
+ACCESS_KEY="rustfsadmin"
+SECRET_KEY="rustfsadmin"
+REGION="us-east-1"
+WARP_BIN="warp"
+CONCURRENCY=8
+DURATION="60s"
+ROUNDS=3
+COOLDOWN_SECS=20
+HEALTH_TIMEOUT_SECS=180
+FAIL_PCT=10
+WARN_PCT=5
+ALLOW_REGRESSION=false
+EXEMPTION_REASON="deliberate correctness tradeoff"
+OUT_DIR="${PROJECT_ROOT}/target/hotpath-abba/$(date -u +%Y%m%dT%H%M%SZ 2>/dev/null || echo run)"
+DRY_RUN=false
+
+WORKLOADS=(
+  "put-4kib|put|4KiB"
+  "put-4mib|put|4MiB"
+  "get-4kib|get|4KiB"
+  "get-4mib|get|4MiB"
+  "get-10mib|get|10MiB"
+  "mixed-256k|mixed|256KiB"
+)
+DRIVE_SYNC_MATRIX=("sync-on|true" "sync-off|false")
+
+usage() {
+  cat <<'USAGE'
+Usage: scripts/run_hotpath_warp_abba.sh --baseline-bin <path> --candidate-bin <path> [options]
+
+Formal ABBA mode for Linux runners or production-like clusters. The schedule is
+A1 baseline -> B1 candidate -> B2 candidate -> A2 baseline for every workload
+and drive-sync cell.
+
+Required:
+  --baseline-bin <path>     Baseline RustFS binary.
+  --candidate-bin <path>    Candidate RustFS binary.
+
+Local Linux runner mode:
+  --address <host:port>     Local RustFS address (default 127.0.0.1:9000).
+  --disks <n>               Throwaway local disks per node (default 4).
+  --data-root <path>        Local disk root (default /tmp/rustfs-hotpath-abba).
+
+Production / cluster mode:
+  --endpoint <host:port>    Existing cluster endpoint. Enables external mode.
+  --deploy-hook <cmd>       Command run before each ABBA leg. It receives:
+                              HOTPATH_ABBA_LEG=A1|B1|B2|A2
+                              HOTPATH_ABBA_PHASE=baseline|candidate
+                              HOTPATH_ABBA_BINARY=<baseline/candidate binary>
+                              HOTPATH_ABBA_DRIVE_SYNC=true|false
+  --health-path <path>      Readiness path (default /health).
+
+Benchmark:
+  --duration <dur>          warp duration per cell (default 60s).
+  --rounds <n>              rounds per cell; must be >= 3 (default 3).
+  --cooldown <n>            cooldown seconds between rounds/sizes (default 20).
+  --concurrency <n>         warp concurrency (default 8).
+  --warp-bin <path>         warp binary (default warp).
+
+Credentials:
+  --access-key <value>      S3 access key (default rustfsadmin).
+  --secret-key <value>      S3 secret key (default rustfsadmin).
+  --region <value>          S3 region (default us-east-1).
+
+Gate:
+  --fail-pct <n>            Regression budget that fails gate (default 10).
+  --warn-pct <n>            Regression budget that warns (default 5).
+  --allow-regression        Downgrade candidate gate FAIL to WARN.
+  --exemption-reason <s>    Reason recorded when allow-regression is used.
+
+Output:
+  --out-dir <path>          Output dir (default target/hotpath-abba/<ts>).
+  --dry-run                 Print commands without starting servers or warp.
+  -h, --help
+
+Outputs:
+  <out-dir>/abba_schedule.csv
+  <out-dir>/candidate_gate.md
+  <out-dir>/baseline_drift_gate.md
+  <out-dir>/summary.md
+  <out-dir>/<workload>/<sync>/<leg>/{median_summary.csv,baseline_compare.csv}
+USAGE
+}
+
+die() {
+  echo "error: $*" >&2
+  exit 2
+}
+
+log() {
+  printf '[hotpath-abba] %s\n' "$*" >&2
+}
+
+run() {
+  if [[ "$DRY_RUN" == "true" ]]; then
+    { printf 'DRY-RUN:'; printf ' %q' "$@"; printf '\n'; } >&2
+    return 0
+  fi
+  "$@"
+}
+
+validate_positive_int() {
+  local value="$1" name="$2"
+  [[ "$value" =~ ^[0-9]+$ && "$value" -gt 0 ]] || die "$name must be a positive integer"
+}
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --baseline-bin) BASELINE_BIN="$2"; shift 2 ;;
+    --candidate-bin) CANDIDATE_BIN="$2"; shift 2 ;;
+    --endpoint) ENDPOINT="$2"; shift 2 ;;
+    --deploy-hook) DEPLOY_HOOK="$2"; shift 2 ;;
+    --health-path) HEALTH_PATH="$2"; shift 2 ;;
+    --address) ADDRESS="$2"; shift 2 ;;
+    --data-root) DATA_ROOT="$2"; shift 2 ;;
+    --disks) DISKS="$2"; shift 2 ;;
+    --access-key) ACCESS_KEY="$2"; shift 2 ;;
+    --secret-key) SECRET_KEY="$2"; shift 2 ;;
+    --region) REGION="$2"; shift 2 ;;
+    --warp-bin) WARP_BIN="$2"; shift 2 ;;
+    --concurrency) CONCURRENCY="$2"; shift 2 ;;
+    --duration) DURATION="$2"; shift 2 ;;
+    --rounds) ROUNDS="$2"; shift 2 ;;
+    --cooldown) COOLDOWN_SECS="$2"; shift 2 ;;
+    --health-timeout) HEALTH_TIMEOUT_SECS="$2"; shift 2 ;;
+    --fail-pct) FAIL_PCT="$2"; shift 2 ;;
+    --warn-pct) WARN_PCT="$2"; shift 2 ;;
+    --allow-regression) ALLOW_REGRESSION=true; shift ;;
+    --exemption-reason) EXEMPTION_REASON="$2"; shift 2 ;;
+    --out-dir) OUT_DIR="$2"; shift 2 ;;
+    --dry-run) DRY_RUN=true; shift ;;
+    -h|--help) usage; exit 0 ;;
+    *) die "unknown argument: $1" ;;
+  esac
+done
+
+validate_positive_int "$DISKS" "--disks"
+validate_positive_int "$CONCURRENCY" "--concurrency"
+validate_positive_int "$ROUNDS" "--rounds"
+validate_positive_int "$COOLDOWN_SECS" "--cooldown"
+validate_positive_int "$HEALTH_TIMEOUT_SECS" "--health-timeout"
+validate_positive_int "$FAIL_PCT" "--fail-pct"
+validate_positive_int "$WARN_PCT" "--warn-pct"
+[[ "$ROUNDS" -ge 3 ]] || die "--rounds must be >= 3 for formal ABBA evidence"
+[[ -n "$BASELINE_BIN" ]] || die "--baseline-bin is required"
+[[ -n "$CANDIDATE_BIN" ]] || die "--candidate-bin is required"
+[[ "$DRY_RUN" == "true" || -x "$BASELINE_BIN" ]] || die "baseline binary is not executable: $BASELINE_BIN"
+[[ "$DRY_RUN" == "true" || -x "$CANDIDATE_BIN" ]] || die "candidate binary is not executable: $CANDIDATE_BIN"
+[[ -x "$ENHANCED_BENCH" ]] || die "missing load driver: $ENHANCED_BENCH"
+[[ -x "$GATE" ]] || die "missing gate: $GATE"
+if [[ "$DRY_RUN" != "true" ]] && ! command -v "$WARP_BIN" >/dev/null 2>&1; then
+  die "warp not found on PATH; install warp or pass --warp-bin"
+fi
+
+EXTERNAL=false
+if [[ -n "$ENDPOINT" ]]; then
+  EXTERNAL=true
+  ADDRESS="$ENDPOINT"
+  [[ -n "$DEPLOY_HOOK" ]] || log "warning: external mode without --deploy-hook; binaries must be swapped out of band"
+fi
+
+mkdir -p "$OUT_DIR"
+SERVER_LOG_DIR="$OUT_DIR/server-logs"
+run mkdir -p "$SERVER_LOG_DIR"
+
+SERVER_PID=""
+SERVER_LOG=""
+tear_down() {
+  [[ "$EXTERNAL" == "true" ]] && return 0
+  [[ -n "$SERVER_PID" ]] || return 0
+  run kill "$SERVER_PID" 2>/dev/null || true
+  SERVER_PID=""
+}
+trap tear_down EXIT INT TERM
+
+dump_server_log() {
+  [[ -n "$SERVER_LOG" && -f "$SERVER_LOG" ]] || return 0
+  echo "----- last 80 lines of $SERVER_LOG -----" >&2
+  tail -n 80 "$SERVER_LOG" >&2 || true
+  echo "----------------------------------------" >&2
+}
+
+wait_health() {
+  [[ "$DRY_RUN" == "true" ]] && return 0
+  local i
+  for ((i = 0; i < HEALTH_TIMEOUT_SECS; i++)); do
+    if [[ "$EXTERNAL" != "true" && -n "$SERVER_PID" ]] && ! kill -0 "$SERVER_PID" 2>/dev/null; then
+      echo "error: rustfs server (pid $SERVER_PID) exited before becoming healthy after ${i}s" >&2
+      dump_server_log
+      return 1
+    fi
+    if curl -fsS "http://${ADDRESS}${HEALTH_PATH}" >/dev/null 2>&1; then
+      return 0
+    fi
+    sleep 1
+  done
+  echo "error: endpoint http://${ADDRESS}${HEALTH_PATH} did not become healthy within ${HEALTH_TIMEOUT_SECS}s" >&2
+  dump_server_log
+  return 1
+}
+
+binary_for_leg() {
+  case "$1" in
+    A1|A2) echo "$BASELINE_BIN" ;;
+    B1|B2) echo "$CANDIDATE_BIN" ;;
+    *) die "unknown ABBA leg: $1" ;;
+  esac
+}
+
+phase_for_leg() {
+  case "$1" in
+    A1|A2) echo "baseline" ;;
+    B1|B2) echo "candidate" ;;
+    *) die "unknown ABBA leg: $1" ;;
+  esac
+}
+
+bring_up() {
+  local leg="$1" drive_sync="$2"
+  local phase bin
+  phase="$(phase_for_leg "$leg")"
+  bin="$(binary_for_leg "$leg")"
+
+  if [[ "$EXTERNAL" == "true" ]]; then
+    if [[ -n "$DEPLOY_HOOK" ]]; then
+      log "deploy hook: leg=$leg phase=$phase drive_sync=$drive_sync"
+      HOTPATH_ABBA_LEG="$leg" HOTPATH_ABBA_PHASE="$phase" HOTPATH_ABBA_BINARY="$bin" HOTPATH_ABBA_DRIVE_SYNC="$drive_sync" \
+        run bash -c "$DEPLOY_HOOK"
+    fi
+    wait_health
+    return 0
+  fi
+
+  local node_dir="$DATA_ROOT/$leg-sync-$drive_sync"
+  local disks=() d
+  for ((d = 1; d <= DISKS; d++)); do
+    disks+=("$node_dir/d$d")
+  done
+  run mkdir -p "${disks[@]}"
+  SERVER_LOG="$SERVER_LOG_DIR/$leg-sync-$drive_sync.log"
+
+  if [[ "$DRY_RUN" == "true" ]]; then
+    { printf 'DRY-RUN: RUSTFS_DRIVE_SYNC_ENABLE=%s %q server' "$drive_sync" "$bin"
+      printf ' %q' "${disks[@]}"; printf '\n'; } >&2
+    SERVER_PID="dry-run"
+    return 0
+  fi
+
+  cat >"$SERVER_LOG_DIR/$leg-sync-$drive_sync.env" <<EOF
+leg=$leg
+phase=$phase
+drive_sync=$drive_sync
+binary=$bin
+address=$ADDRESS
+disks=${disks[*]}
+health_url=http://${ADDRESS}${HEALTH_PATH}
+health_timeout_secs=$HEALTH_TIMEOUT_SECS
+uname=$(uname -a 2>/dev/null || echo unknown)
+warp_version=$("$WARP_BIN" --version 2>/dev/null | head -n1 || echo unknown)
+EOF
+  RUSTFS_UNSAFE_BYPASS_DISK_CHECK=true \
+  RUSTFS_ADDRESS="$ADDRESS" \
+  RUSTFS_ACCESS_KEY="$ACCESS_KEY" \
+  RUSTFS_SECRET_KEY="$SECRET_KEY" \
+  RUSTFS_REGION="$REGION" \
+  RUSTFS_CONSOLE_ENABLE=false \
+  RUSTFS_DRIVE_SYNC_ENABLE="$drive_sync" \
+    "$bin" server "${disks[@]}" >"$SERVER_LOG" 2>&1 &
+  SERVER_PID=$!
+  wait_health
+}
+
+measure() {
+  local leg="$1" workload="$2" mode="$3" size="$4" sync_label="$5" baseline_csv="${6:-}"
+  local cell="$OUT_DIR/$workload/$sync_label/$leg"
+  local args=(
+    --tool warp --warp-bin "$WARP_BIN" --warp-mode "$mode"
+    --endpoint "$ADDRESS" --access-key "$ACCESS_KEY" --secret-key "$SECRET_KEY"
+    --region "$REGION" --sizes "$size" --concurrency "$CONCURRENCY"
+    --duration "$DURATION" --rounds "$ROUNDS" --cooldown-secs "$COOLDOWN_SECS"
+    --out-dir "$cell"
+  )
+  [[ -n "$baseline_csv" ]] && args+=(--baseline-csv "$baseline_csv")
+  run "$ENHANCED_BENCH" "${args[@]}" >&2
+  echo "$cell"
+}
+
+write_schedule_header() {
+  echo "sync_label,drive_sync,workload,mode,size,leg,phase,binary,out_dir" >"$OUT_DIR/abba_schedule.csv"
+}
+
+append_schedule() {
+  local sync_label="$1" drive_sync="$2" workload="$3" mode="$4" size="$5" leg="$6"
+  local phase bin
+  phase="$(phase_for_leg "$leg")"
+  bin="$(binary_for_leg "$leg")"
+  echo "$sync_label,$drive_sync,$workload,$mode,$size,$leg,$phase,$bin,$OUT_DIR/$workload/$sync_label/$leg" >>"$OUT_DIR/abba_schedule.csv"
+}
+
+write_manifest() {
+  cat >"$OUT_DIR/manifest.env" <<EOF
+generated_at_utc=$(date -u +%Y-%m-%dT%H:%M:%SZ 2>/dev/null || echo unknown)
+runner=$(uname -srm 2>/dev/null || echo unknown)
+schedule=ABBA
+rounds=$ROUNDS
+duration=$DURATION
+cooldown_secs=$COOLDOWN_SECS
+concurrency=$CONCURRENCY
+baseline_bin=$BASELINE_BIN
+candidate_bin=$CANDIDATE_BIN
+external=$EXTERNAL
+endpoint=$ADDRESS
+warp_version=$("$WARP_BIN" --version 2>/dev/null | head -n1 || echo unknown)
+EOF
+}
+
+declare -a CANDIDATE_COMPARE_CSVS=()
+declare -a DRIFT_COMPARE_CSVS=()
+
+write_manifest
+write_schedule_header
+
+for ds_spec in "${DRIVE_SYNC_MATRIX[@]}"; do
+  IFS='|' read -r sync_label drive_sync <<<"$ds_spec"
+
+  for leg in A1 B1 B2 A2; do
+    log "=== $sync_label leg $leg ($(phase_for_leg "$leg")) ==="
+    bring_up "$leg" "$drive_sync"
+
+    for wl_spec in "${WORKLOADS[@]}"; do
+      IFS='|' read -r workload mode size <<<"$wl_spec"
+      append_schedule "$sync_label" "$drive_sync" "$workload" "$mode" "$size" "$leg"
+
+      baseline_csv=""
+      if [[ "$leg" != "A1" ]]; then
+        baseline_csv="$OUT_DIR/$workload/$sync_label/A1/median_summary.csv"
+      fi
+
+      cell="$(measure "$leg" "$workload" "$mode" "$size" "$sync_label" "$baseline_csv")"
+      case "$leg" in
+        B1|B2) CANDIDATE_COMPARE_CSVS+=("$cell/baseline_compare.csv") ;;
+        A2) DRIFT_COMPARE_CSVS+=("$cell/baseline_compare.csv") ;;
+      esac
+    done
+
+    tear_down
+  done
+done
+
+gate_args=(--fail-pct "$FAIL_PCT" --warn-pct "$WARN_PCT" --markdown "$OUT_DIR/candidate_gate.md")
+for csv in "${CANDIDATE_COMPARE_CSVS[@]}"; do
+  gate_args+=(--compare-csv "$csv")
+done
+[[ "$ALLOW_REGRESSION" == "true" ]] && gate_args+=(--allow-regression --exemption-reason "$EXEMPTION_REASON")
+
+drift_gate_args=(--fail-pct "$FAIL_PCT" --warn-pct "$WARN_PCT" --markdown "$OUT_DIR/baseline_drift_gate.md")
+for csv in "${DRIFT_COMPARE_CSVS[@]}"; do
+  drift_gate_args+=(--compare-csv "$csv")
+done
+
+if [[ "$DRY_RUN" == "true" ]]; then
+  log "dry-run complete; candidate compare CSVs=${#CANDIDATE_COMPARE_CSVS[@]} baseline drift CSVs=${#DRIFT_COMPARE_CSVS[@]}"
+  { printf 'DRY-RUN:'; printf ' %q' "$GATE" "${gate_args[@]}"; printf '\n'; } >&2
+  { printf 'DRY-RUN:'; printf ' %q' "$GATE" "${drift_gate_args[@]}"; printf '\n'; } >&2
+  exit 0
+fi
+
+log "applying candidate relative-budget gate"
+set +e
+"$GATE" "${gate_args[@]}"
+candidate_status=$?
+set -e
+
+log "applying A2-vs-A1 baseline drift gate"
+set +e
+"$GATE" "${drift_gate_args[@]}"
+drift_status=$?
+set -e
+
+cat >"$OUT_DIR/summary.md" <<EOF
+# Hotpath Warp ABBA Summary
+
+- schedule: A1 baseline -> B1 candidate -> B2 candidate -> A2 baseline
+- runner: $(uname -srm 2>/dev/null || echo unknown)
+- warp: $("$WARP_BIN" --version 2>/dev/null | head -n1 || echo unknown)
+- matrix: duration=$DURATION rounds=$ROUNDS cooldown=$COOLDOWN_SECS disks=$DISKS concurrency=$CONCURRENCY
+- endpoint: $ADDRESS
+- baseline binary: $BASELINE_BIN
+- candidate binary: $CANDIDATE_BIN
+- candidate gate: $OUT_DIR/candidate_gate.md (exit $candidate_status)
+- baseline drift gate: $OUT_DIR/baseline_drift_gate.md (exit $drift_status)
+
+Interpretation:
+
+- Treat candidate gate failures as actionable only when the A2-vs-A1 drift gate is PASS or the affected workload's A2 drift is materially smaller than the B1/B2 candidate delta.
+- If both candidate and baseline drift fail on the same workload, rerun with longer duration, more rounds, or a quieter runner before assigning causality.
+EOF
+
+log "summary written to $OUT_DIR/summary.md"
+if [[ "$candidate_status" -ne 0 || "$drift_status" -ne 0 ]]; then
+  exit 1
+fi