Use epoch as the gossip purge timeout for staked nodes. (#7005)

automerge

core/src/streamer.rs

@@ -4,6 +4,7 @@
 use crate::packet::{self, send_to, Packets, PacketsRecycler, PACKETS_PER_BATCH};
 use crate::recvmmsg::NUM_RCVMMSGS;
 use crate::result::{Error, Result};
+use crate::thread_mem_usage;
 use solana_sdk::timing::duration_as_ms;
 use std::net::UdpSocket;
 use std::sync::atomic::{AtomicBool, Ordering};
@@ -75,6 +76,7 @@ pub fn receiver(
     Builder::new()
         .name("solana-receiver".to_string())
         .spawn(move || {
+            thread_mem_usage::datapoint(name);
             let _ = recv_loop(&sock, exit, &packet_sender, &recycler.clone(), name);
         })
         .unwrap()
@@ -111,6 +113,7 @@ pub fn responder(name: &'static str, sock: Arc<UdpSocket>, r: PacketReceiver) ->
     Builder::new()
         .name(format!("solana-responder-{}", name))
         .spawn(move || loop {
+            thread_mem_usage::datapoint(name);
             if let Err(e) = recv_send(&sock, &r) {
                 match e {
                     Error::RecvTimeoutError(RecvTimeoutError::Disconnected) => break,