Rollup merge of #106701 - ibraheemdev:sync-sender-spin, r=Amanieu

Fix `mpsc::SyncSender` spinning behavior

Resolves https://github.com/rust-lang/rust/issues/106668.

1 files changed, 7 insertions, 7 deletions

diff --git a/library/std/src/sync/mpmc/array.rs b/library/std/src/sync/mpmc/array.rs
index f71edc6c525..c1e3e48b044 100644
--- a/library/std/src/sync/mpmc/array.rs
+++ b/library/std/src/sync/mpmc/array.rs
@@ -168,7 +168,7 @@ impl<T> Channel<T> {
                         return true;
                     }
                     Err(_) => {
-                        backoff.spin();
+                        backoff.spin_light();
                         tail = self.tail.load(Ordering::Relaxed);
                     }
                 }
@@ -182,11 +182,11 @@ impl<T> Channel<T> {
                     return false;
                 }
 
-                backoff.spin();
+                backoff.spin_light();
                 tail = self.tail.load(Ordering::Relaxed);
             } else {
                 // Snooze because we need to wait for the stamp to get updated.
-                backoff.snooze();
+                backoff.spin_heavy();
                 tail = self.tail.load(Ordering::Relaxed);
             }
         }
@@ -251,7 +251,7 @@ impl<T> Channel<T> {
                         return true;
                     }
                     Err(_) => {
-                        backoff.spin();
+                        backoff.spin_light();
                         head = self.head.load(Ordering::Relaxed);
                     }
                 }
@@ -273,11 +273,11 @@ impl<T> Channel<T> {
                     }
                 }
 
-                backoff.spin();
+                backoff.spin_light();
                 head = self.head.load(Ordering::Relaxed);
             } else {
                 // Snooze because we need to wait for the stamp to get updated.
-                backoff.snooze();
+                backoff.spin_heavy();
                 head = self.head.load(Ordering::Relaxed);
             }
         }
@@ -330,7 +330,7 @@ impl<T> Channel<T> {
                 if backoff.is_completed() {
                     break;
                 } else {
-                    backoff.spin();
+                    backoff.spin_light();
                 }
             }