From ce92f8b4634b128c4e1090d26617a17fb73ae3d5 Mon Sep 17 00:00:00 2001
From: Magnus Hagander <magnus@hagander.net>
Date: Tue, 5 Jan 2010 11:06:28 +0000
Subject: [PATCH] Use _mm_pause() for win64 spin_delay(), per note from Tsutomu
Yamada.
---
src/include/storage/s_lock.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
index c6edb7a5e9e..4104cf6c4ca 100644
--- a/src/include/storage/s_lock.h
+++ b/src/include/storage/s_lock.h
@@ -66,7 +66,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.170 2010/01/04 17:10:24 mha Exp $
+ * $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.171 2010/01/05 11:06:28 mha Exp $
*
*-------------------------------------------------------------------------
*/
@@ -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
--
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