convert std::sync::mpsc to crossbeam_channel (#22264)

streamer/Cargo.toml

@@ -10,6 +10,7 @@ documentation = "https://docs.rs/solana-streamer"
 edition = "2021"
 
 [dependencies]
+crossbeam-channel = "0.5"
 histogram = "0.6.9"
 itertools = "0.10.3"
 log = "0.4.14"

streamer/src/streamer.rs

@@ -7,6 +7,7 @@ use {
         recvmmsg::NUM_RCVMMSGS,
         socket::SocketAddrSpace,
     },
+    crossbeam_channel::{Receiver, RecvTimeoutError, SendError, Sender},
     histogram::Histogram,
     solana_sdk::{packet::Packet, timing::timestamp},
     std::{
@@ -15,7 +16,6 @@ use {
         net::{IpAddr, UdpSocket},
         sync::{
             atomic::{AtomicBool, Ordering},
-            mpsc::{Receiver, RecvTimeoutError, SendError, Sender},
             Arc,
         },
         thread::{Builder, JoinHandle},
@@ -324,6 +324,7 @@ mod test {
             packet::{Packet, PacketBatch, PACKET_DATA_SIZE},
             streamer::{receiver, responder},
         },
+        crossbeam_channel::unbounded,
         solana_perf::recycler::Recycler,
         std::{
             io,
@@ -331,7 +332,6 @@ mod test {
             net::UdpSocket,
             sync::{
                 atomic::{AtomicBool, Ordering},
-                mpsc::channel,
                 Arc,
             },
             time::Duration,
@@ -366,7 +366,7 @@ mod test {
         let addr = read.local_addr().unwrap();
         let send = UdpSocket::bind("127.0.0.1:0").expect("bind");
         let exit = Arc::new(AtomicBool::new(false));
-        let (s_reader, r_reader) = channel();
+        let (s_reader, r_reader) = unbounded();
         let t_receiver = receiver(
             Arc::new(read),
             &exit,
@@ -377,7 +377,7 @@ mod test {
             true,
         );
         let t_responder = {
-            let (s_responder, r_responder) = channel();
+            let (s_responder, r_responder) = unbounded();
             let t_responder = responder(
                 "streamer_send_test",
                 Arc::new(send),