optimize: Use lockfree queue in heartbeat queue

sorock/Cargo.toml

@@ -20,6 +20,7 @@ derive_more = { version = "1", features = ["full"] }
 flume = "0.11.0"
 futures.workspace = true
 http-serde = "2"
+lockfree = "0.5.1"
 moka = { version = "0.12", features = ["sync"] }
 oneshot = "0.1.7"
 phi-detector = "0.4"
@@ -43,4 +44,4 @@ tokio = { version = "1", features = ["full"] }
 [build-dependencies]
 prost-build.workspace = true
 protox.workspace = true
-tonic-build.workspace = true
+tonic-build.workspace = true

sorock/src/service/raft/communicator/heartbeat_multiplex.rs

@@ -1,40 +1,35 @@
 use super::*;
 
-use spin::Mutex;
 use std::collections::HashMap;
 
 pub struct HeartbeatBuffer {
-    buf: HashMap<ShardId, request::Heartbeat>,
+    buf: lockfree::queue::Queue<(ShardId, request::Heartbeat)>,
 }
 impl HeartbeatBuffer {
     pub fn new() -> Self {
         Self {
-            buf: HashMap::new(),
+            buf: lockfree::queue::Queue::new(),
         }
     }
 
-    pub fn push(&mut self, shard_id: ShardId, req: request::Heartbeat) {
-        self.buf.insert(shard_id, req);
+    pub fn push(&self, shard_id: ShardId, req: request::Heartbeat) {
+        self.buf.push((shard_id, req));
     }
 
-    fn drain(&mut self) -> HashMap<ShardId, request::Heartbeat> {
-        self.buf.drain().collect()
+    fn drain(&self) -> HashMap<ShardId, request::Heartbeat> {
+        let mut out = HashMap::new();
+        for (k, v) in self.buf.pop_iter() {
+            out.insert(k, v);
+        }
+        out
     }
 }
 
-pub async fn run(
-    buf: Arc<Mutex<HeartbeatBuffer>>,
-    mut cli: raft::RaftClient,
-    self_node_id: NodeId,
-) {
+pub async fn run(buf: Arc<HeartbeatBuffer>, mut cli: raft::RaftClient, self_node_id: NodeId) {
     loop {
         tokio::time::sleep(Duration::from_millis(300)).await;
 
-        let heartbeats = {
-            let mut buf = buf.lock();
-            let out = buf.drain();
-            out
-        };
+        let heartbeats = buf.drain();
 
         let states = {
             let mut out = HashMap::new();

sorock/src/service/raft/communicator/mod.rs

@@ -4,8 +4,6 @@ mod heartbeat_multiplex;
 mod stream;
 
 use heartbeat_multiplex::*;
-use process::*;
-use spin::Mutex;
 use std::sync::Arc;
 use tokio::task::AbortHandle;
 
@@ -19,7 +17,7 @@ impl Drop for HandleDrop {
 #[derive(Clone)]
 pub struct RaftConnection {
     client: raft::RaftClient,
-    heartbeat_buffer: Arc<Mutex<HeartbeatBuffer>>,
+    heartbeat_buffer: Arc<HeartbeatBuffer>,
     _abort_hdl: Arc<HandleDrop>,
 }
 impl RaftConnection {
@@ -35,7 +33,7 @@ impl RaftConnection {
             raft::RaftClient::new(chan)
         };
 
-        let heartbeat_buffer = Arc::new(Mutex::new(HeartbeatBuffer::new()));
+        let heartbeat_buffer = Arc::new(HeartbeatBuffer::new());
 
         let fut = heartbeat_multiplex::run(heartbeat_buffer.clone(), client.clone(), self_node_id);
         let fut = tokio::task::unconstrained(fut);
@@ -77,7 +75,7 @@ impl Communicator {
     }
 
     pub fn queue_heartbeat(&self, req: request::Heartbeat) {
-        self.conn.heartbeat_buffer.lock().push(self.shard_id, req);
+        self.conn.heartbeat_buffer.push(self.shard_id, req);
     }
 
     pub async fn process_user_write_request(