From: "Geoff Gustafson" <geoff@linux.jf.intel.com>
To: "Andrew Morton" <akpm@osdl.org>, <linux-kernel@vger.kernel.org>
Cc: "Ken Chen" <kenneth.w.chen@intel.com>
Subject: Re: [RFC] [PATCH] Performance of del_timer_sync
Date: Tue, 11 May 2004 11:36:58 -0700 [thread overview]
Message-ID: <00c001c43786$f1805000$ff0da8c0@amr.corp.intel.com> (raw)
In-Reply-To: <20040511004551.7c7af44d.akpm@osdl.org>
Andrew Morton wrote:
> Geoff Gustafson <geoff@linux.jf.intel.com> wrote:
>>
>> I started this patch based on profiling an enterprise database
>> application on a 32p IA64 NUMA machine, where del_timer_sync was
>> one of the top few functions taking CPU time in the kernel.
>
> Do you know where it's being called from?
OK, the main sources were:
sys_semtimedop() -> schedule_timeout()
sys_io_getevents() -> read_events() -> clear_timeout()
- Geoff
next prev parent reply other threads:[~2004-05-11 18:37 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-10 22:16 Geoff Gustafson
2004-05-11 7:45 ` Andrew Morton
2004-05-11 18:36 ` Geoff Gustafson [this message]
2004-05-11 19:11 ` Andrew Morton
2004-05-11 19:23 ` Chen, Kenneth W
2004-05-11 19:28 ` Andrew Morton
2004-05-11 19:30 ` Andrew Morton
2004-05-11 19:58 ` Ingo Molnar
2004-05-11 20:11 ` Andrew Morton
2004-05-11 20:19 ` Christoph Hellwig
2004-05-11 20:26 ` Andrew Morton
2004-05-11 20:32 ` Ingo Molnar
2004-05-11 20:55 ` Andrew Morton
2004-05-11 20:57 ` Ingo Molnar
2004-05-11 21:01 ` Chen, Kenneth W
2004-05-11 20:26 ` Ingo Molnar
2004-05-11 20:27 ` Chen, Kenneth W
2004-05-11 20:30 ` Andrew Morton
2004-05-11 20:45 ` Chen, Kenneth W
2004-05-11 20:38 ` Ingo Molnar
2004-05-11 22:46 Geoff Gustafson
[not found] <40A152A8.4080104@linux.intel.com>
2004-05-11 23:03 ` Andrew Morton
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