Use _mm_pause() for win64 spin_delay(), per note from Tsutomu Yamada.

diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
index ac2ba6e96c480eb76c619e2e6c0188260d78a76f..aede32dd162fd9b09de2246f66eea6c99119135f 100644 (file)
--- a/src/include/storage/s_lock.h
+++ b/src/include/storage/s_lock.h
@@ -837,13 +837,13 @@ typedef LONG slock_t;
 #define SPIN_DELAY() spin_delay()
 
 /* If using Visual C++ on Win64, inline assembly is unavailable.
- * Use a __nop instrinsic instead of rep nop.
+ * Use a _mm_pause instrinsic instead of rep nop.
  */
 #if defined(_WIN64)
 static __forceinline void
 spin_delay(void)
 {
-   __nop();
+   _mm_pause();
 }
 #else
 static __forceinline void