Every push to main now builds the release binary once and stores it in the
actions cache as rustfs-baseline-<sha> (build-baseline-cache job). The A/B job
restores it for origin/main and passes --baseline-bin; on the nightly, where
the candidate commit equals the baseline, one cached binary serves both phases
with --skip-build and the run does zero source builds. A cache miss falls back
to the source double-build via --baseline-ref origin/main.
This removes the ~32min-per-side double build that pushed the 24-cell nightly
past its 120min ceiling (2026-07-11..07-14 all cancelled on timeout).
Also:
- alert-on-failure now fires on cancelled/timed-out, not just failure, so a
timed-out nightly is no longer silent (the composite action already reports
cancelled jobs); removed the stale perf-2 TODO now that the alert job exists.
- run_hotpath_warp_ab.sh appends a Provenance section to gate.md (baseline and
candidate SHAs + binary source, runner, warp version, matrix params) via a
repeatable --provenance-note; the gate exit code is preserved.
Refs rustfs/backlog#1152 (perf-3).
git worktree add prints 'HEAD is now at …' on stdout, which polluted the
path captured from build_ref_binary and made the rig exec a two-line
string as the baseline binary (dispatch run 29087503110 died 1s after
spawn with 'No such file or directory'). Route command output to stderr,
verify the baseline binary exists before returning (exempt in dry-run),
and fix the 'mis-reports' typo flagged by the Typos check.
Both nightly runs of the warp A/B rig failed at server bring-up:
`endpoint http://127.0.0.1:9000/health did not become healthy` — exactly 60s
after start. The server binds its public listener only after startup converges
(erasure-format load + IAM); its own budget
(RUSTFS_STARTUP_READINESS_MAX_WAIT_SECS) defaults to 120s, so the rig's 60s
health poll gave up before a slow cold start on the shared sm-standard-2 runner
finished. The rustfs.log lived under /tmp (not the uploaded target/hotpath-ab/),
so the root cause was invisible in the artifact.
Root-cause + diagnosability (scripts/run_hotpath_warp_ab.sh):
- Health poll is configurable via --health-timeout, default 180s (> the 120s
server startup budget). Fails fast if the local server process exits before
becoming healthy instead of polling out the full window.
- Server logs + a startup-env file now write under OUT_DIR/server-logs/ so they
ride along in the CI artifact. On a health failure the rig dumps the last 50
log lines to the job log.
Workflow (.github/workflows/performance-ab.yml):
- On every run, write gate.md (or, on a pre-gate failure, the failing phase's
server-log tails) into $GITHUB_STEP_SUMMARY; short artifact retention.
- Short measurement matrix (--duration/--rounds/--cooldown) so the expanded
matrix fits; timeout-minutes 90 -> 120 as a Phase-0 stopgap until perf-3
caches the baseline binary (the ~65min double build dominates).
- TODO(ci-8/perf-2) hook comment for the failure-alert composite action.
Workload cells (absorbed perf-4): add put-4kib/get-4kib (the #4221 fsync
regression size, ~-10% @4KiB, previously invisible) and get-10mib (historical
large-GET EOF size) to both the PR-labeled and nightly matrices — 6 workloads
x 2 phases x 2 drive-sync = 24 cells. A 1KiB cell is deferred to protect the
budget until perf-3.
Refs rustfs/backlog#1152 (perf-1, absorbed perf-4), rustfs/backlog#1155.
* ci(perf): warp A/B relative-budget gate for the hotpath series
performance.yml only uploads a samply profile and a cargo-bench artifact with
no pass/fail, so a 26x-class write-path regression like #4221 or the GET perf
churn would sail through CI and only surface in customer load tests. This adds
the missing gate — the acceptance surface every queued HP change (#922/#923/
#925/#927/#930/#932) needs before its default can flip.
- scripts/hotpath_warp_ab_gate.sh: applies the relative budget to the
baseline_compare.csv that run_object_batch_bench_enhanced.sh already emits
(it computes deltas but never gates). A metric regressing past --fail-pct
fails, past --warn-pct warns; reqps/throughput are higher-is-better, latency
lower-is-better. --allow-regression downgrades a FAIL to an exempted WARN so
a deliberate correctness cost (e.g. #4221) is recorded, not blocked
(rustfs/backlog#935 correction 1). Unit-checked across pass/warn/fail/exempt.
- scripts/run_hotpath_warp_ab.sh: single-host baseline-binary vs candidate-
binary A/B over {put-4mib, get-4mib, mixed-256k} x {drive-sync on, off},
reusing the enhanced bench as the warp driver and the single-node local-disk
lifecycle. Has --dry-run; warp is assumed pre-installed as elsewhere in
scripts/. Drive-sync on/off keeps a sync-semantics change from being masked
by nosync numbers.
- .github/workflows/performance-ab.yml: nightly on main (post-merge detection)
plus opt-in pre-merge via the `perf-ab` label; `perf-deliberate-tradeoff`
runs the gate with --allow-regression; posts the gate table as a PR comment
and uploads the run. A Linux runner answers "do the macOS conclusions hold".
The gate logic is unit-validated with synthetic compare CSVs; the orchestrator
and workflow are shellcheck- and --dry-run-validated. The first real warp
measurement belongs on the Linux runner (no warp/multi-disk rig locally).
Refs: rustfs/backlog#935 (HP-14 warp A/B gate, item 4), rustfs/backlog#725
(cooled A/B harness precedent), rustfs/backlog#936
Co-Authored-By: heihutu <heihutu@gmail.com>
* ci(perf): pin upload-artifact, add external-cluster A/B mode + runbook
- Pin actions/upload-artifact to the repo-standard full-length SHA (# v6);
the previous @v4 float tripped the workflow-pin guard.
- Add an external deployment mode to run_hotpath_warp_ab.sh so warp can target
an already-running cluster instead of a throwaway single-node server:
--endpoint selects the cluster and --deploy-hook runs between phases to swap
in the phase's binary and drive-sync config (context passed via
HOTPATH_AB_PHASE / HOTPATH_AB_BINARY / HOTPATH_AB_DRIVE_SYNC). This maps onto
the team's ansible harness (cargo zigbuild -> ansible rustfs-manage --tags
stop,config,binary-copy,start -> warp).
- Restructure the matrix loop to bring a deployment up once per (phase,
drive-sync) and run all three workloads against it, instead of restarting per
workload — fewer server starts / cluster redeploys. Baseline medians are read
from a deterministic path, dropping the bash-4-only associative array so the
script (and its --dry-run self-check) runs on macOS bash 3.2 too.
- Add docs/operations/hotpath-warp-ab-runbook.md tying local mode, the ansible
external mode, and the budget/exemption together.
Verification: shellcheck clean; --dry-run in both modes prints the expected
4 deployments x 3 workloads and passes exactly 6 compare CSVs to the gate;
check_workflow_pins.sh, check_doc_paths.sh, and make pre-commit all pass.
Refs: rustfs/backlog#935, rustfs/backlog#936
Co-Authored-By: heihutu <heihutu@gmail.com>
---------
Co-authored-by: heihutu <heihutu@gmail.com>
Zhengchao An