From: Ron <ron@debian.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>, linux-kernel@vger.kernel.org
Subject: [PATCH] fix for sched_clock() when using jiffies
Date: Sat, 9 May 2009 05:34:44 +0930 [thread overview]
Message-ID: <20090508200444.GA22132@homer.shelbyville.oz> (raw)
In-Reply-To: <20090508132449.GV5417@homer.shelbyville.oz>
Account for the initial offset to the jiffy count.
Signed-off-by: Ron Lee <ron@debian.org>
---
kernel/sched_clock.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c
index a0b0852..a1567b1 100644
--- a/kernel/sched_clock.c
+++ b/kernel/sched_clock.c
@@ -37,7 +37,8 @@
*/
unsigned long long __attribute__((weak)) sched_clock(void)
{
- return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ);
+ return (unsigned long long)(jiffies - INITIAL_JIFFIES)
+ * (NSEC_PER_SEC / HZ);
}
static __read_mostly int sched_clock_running;
--
1.6.1.3
next prev parent reply other threads:[~2009-05-08 20:40 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-26 15:06 [patch] fix for sched_clock() when using jiffies Ron
2008-11-26 15:16 ` Peter Zijlstra
2008-11-26 15:31 ` Ron
2008-11-28 14:40 ` Ingo Molnar
2009-05-08 13:24 ` [PATCH] " Ron
2009-05-08 20:04 ` Ron [this message]
2009-05-08 23:01 ` Andrew Morton
2009-05-09 0:40 ` Ron
2009-05-09 1:15 ` Andrew Morton
2009-05-09 4:05 ` Ron
2009-05-09 7:04 ` Andrew Morton
2009-05-10 10:45 ` Ron
2009-05-09 12:41 ` Paul Mundt
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