Write helper for multithread update (#18808)

core/benches/cluster_info.rs

@@ -16,12 +16,16 @@ use solana_ledger::{
     shred::Shred,
 };
 use solana_runtime::{bank::Bank, bank_forks::BankForks};
-use solana_sdk::{pubkey, signature::Keypair, timing::timestamp};
+use solana_sdk::{
+    pubkey,
+    signature::Keypair,
+    timing::{timestamp, AtomicInterval},
+};
 use solana_streamer::socket::SocketAddrSpace;
 use std::{
     collections::HashMap,
     net::UdpSocket,
-    sync::{atomic::AtomicU64, Arc, RwLock},
+    sync::{Arc, RwLock},
 };
 use test::Bencher;
 
@@ -54,7 +58,7 @@ fn broadcast_shreds_bench(bencher: &mut Bencher) {
     let cluster_info = Arc::new(cluster_info);
     let cluster_nodes = ClusterNodes::<BroadcastStage>::new(&cluster_info, &stakes);
     let shreds = Arc::new(shreds);
-    let last_datapoint = Arc::new(AtomicU64::new(0));
+    let last_datapoint = Arc::new(AtomicInterval::default());
     bencher.iter(move || {
         let shreds = shreds.clone();
         broadcast_shreds(