Threads: add spinlock hit for hyperthreading processors on Windows.

Suggested by Percy Ross Tiglao.
2018-05-26 22:29:10 +02:00 · 2018-05-26 22:29:10 +02:00 · ef502854fe
parent c9db7ceff2
commit ef502854fe
1 changed files with 2 additions and 1 deletions
--- a/source/blender/blenlib/intern/threads.c
+++ b/source/blender/blenlib/intern/threads.c
@ -488,7 +488,8 @@ void BLI_spin_lock(SpinLock *spin)
 #elif defined(_MSC_VER)
 	while (InterlockedExchangeAcquire(spin, 1)) {
 		while (*spin) {
-			/* pass */
+			/* Spinlock hint for processors with hyperthreading. */
+			YieldProcessor();
 		}
 	}
 #else