RPC performance changes

- configurable ping timeout
- single, much higher, configurable RPC timeout
- no more concurrency semaphore

src/model/k2v/rpc.rs

@@ -23,7 +23,6 @@ use garage_rpc::system::System;
 use garage_rpc::*;
 
 use garage_table::replication::{TableReplication, TableShardedReplication};
-use garage_table::table::TABLE_RPC_TIMEOUT;
 use garage_table::{PartitionKey, Table};
 
 use crate::k2v::causality::*;
@@ -117,7 +116,6 @@ impl K2VRpcHandler {
 				}),
 				RequestStrategy::with_priority(PRIO_NORMAL)
 					.with_quorum(1)
-					.with_timeout(TABLE_RPC_TIMEOUT)
 					.interrupt_after_quorum(true),
 			)
 			.await?;
@@ -169,7 +167,6 @@ impl K2VRpcHandler {
 					K2VRpc::InsertManyItems(items),
 					RequestStrategy::with_priority(PRIO_NORMAL)
 						.with_quorum(1)
-						.with_timeout(TABLE_RPC_TIMEOUT)
 						.interrupt_after_quorum(true),
 				)
 				.await?;
@@ -205,22 +202,23 @@ impl K2VRpcHandler {
 			.replication
 			.write_nodes(&poll_key.partition.hash());
 
-		let resps = self
-			.system
-			.rpc
-			.try_call_many(
-				&self.endpoint,
-				&nodes[..],
-				K2VRpc::PollItem {
-					key: poll_key,
-					causal_context,
-					timeout_msec,
-				},
-				RequestStrategy::with_priority(PRIO_NORMAL)
-					.with_quorum(self.item_table.data.replication.read_quorum())
-					.with_timeout(Duration::from_millis(timeout_msec) + TABLE_RPC_TIMEOUT),
-			)
-			.await?;
+		let rpc = self.system.rpc.try_call_many(
+			&self.endpoint,
+			&nodes[..],
+			K2VRpc::PollItem {
+				key: poll_key,
+				causal_context,
+				timeout_msec,
+			},
+			RequestStrategy::with_priority(PRIO_NORMAL)
+				.with_quorum(self.item_table.data.replication.read_quorum())
+				.without_timeout(),
+		);
+		let timeout_duration = Duration::from_millis(timeout_msec) + self.system.rpc.rpc_timeout();
+		let resps = select! {
+			r = rpc => r?,
+			_ = tokio::time::sleep(timeout_duration) => return Ok(None),
+		};
 
 		let mut resp: Option<K2VItem> = None;
 		for v in resps {