From: Andi Kleen <andi@firstfloor.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Styner, Douglas W" <douglas.w.styner@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Tripathi, Sharad C" <sharad.c.tripathi@intel.com>,
"arjan@linux.intel.com" <arjan@linux.intel.com>,
"Wilcox, Matthew R" <matthew.r.wilcox@intel.com>,
"Kleen, Andi" <andi.kleen@intel.com>,
"Siddha, Suresh B" <suresh.b.siddha@intel.com>,
"Ma, Chinang" <chinang.ma@intel.com>,
"Wang, Peter Xihong" <peter.xihong.wang@intel.com>,
"Nueckel, Hubert" <hubert.nueckel@intel.com>,
"Recalde, Luis F" <luis.f.recalde@intel.com>,
"Nelson, Doug" <doug.nelson@intel.com>,
"Cheng, Wu-sun" <wu-sun.cheng@intel.com>,
"Prickett, Terry O" <terry.o.prickett@intel.com>,
"Shunmuganathan,
Rajalakshmi" <rajalakshmi.shunmuganathan@intel.com>,
"Garg, Anil K" <anil.k.garg@intel.com>,
"Chilukuri, Harita" <harita.chilukuri@intel.com>,
"chris.mason@oracle.com" <chris.mason@oracle.com>
Subject: Re: Mainline kernel OLTP performance update
Date: Wed, 29 Apr 2009 10:28:25 +0200 [thread overview]
Message-ID: <871vrbrhhy.fsf@basil.nowhere.org> (raw)
In-Reply-To: <20090429002930.b786348b.akpm@linux-foundation.org> (Andrew Morton's message of "Wed, 29 Apr 2009 00:29:30 -0700")
Andrew Morton <akpm@linux-foundation.org> writes:
>> ======oprofile CPU_CLK_UNHALTED for top 30 functions
>> Cycles% 2.6.24.2 Cycles% 2.6.30-rc3
>> 74.8578 <database> 69.1925 <database>
>
> ouch, that's a large drop in userspace CPU occupancy. It seems
> inconsistent with the 1.91% above.
That was determined to be an oprofile artifact/regression (see Doug's
other email+thread) The 2.6.30 oprofile seems to be less accurate than
the one in 2.6.24. Of course the question is if it can't get
the user space right, is the kernel data accurate. But I believe
Doug verified with vtune that the kernel data is roughly correct,
just user space profiling was slightly bogus (right, Doug, or
do I misrepresent that?)
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2009-04-29 8:28 UTC|newest]
Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-28 17:08 Mainline kernel OLTP performance update Styner, Douglas W
2009-04-29 7:29 ` Andrew Morton
2009-04-29 8:28 ` Andi Kleen [this message]
2009-04-29 16:00 ` Styner, Douglas W
2009-04-29 16:06 ` Wilcox, Matthew R
2009-04-29 16:19 ` Andi Kleen
2009-04-29 15:48 ` Styner, Douglas W
2009-04-29 16:07 ` Andrew Morton
2009-04-29 16:25 ` Peter Zijlstra
2009-04-29 17:46 ` Chris Mason
2009-04-29 18:06 ` Pallipadi, Venkatesh
2009-04-29 18:25 ` Styner, Douglas W
2009-04-29 17:52 ` Styner, Douglas W
-- strict thread matches above, loose matches on Subject: below --
2010-01-25 18:26 Ma, Chinang
2009-05-04 15:54 Styner, Douglas W
2009-05-06 6:29 ` Anirban Chakraborty
2009-05-06 15:53 ` Wilcox, Matthew R
2009-05-06 18:05 ` Styner, Douglas W
2009-05-06 18:12 ` Wilcox, Matthew R
2009-05-06 18:24 ` Anirban Chakraborty
2009-05-06 19:25 ` Wilcox, Matthew R
2009-05-06 18:19 ` Styner, Douglas W
2009-04-28 17:22 Styner, Douglas W
2009-04-23 16:49 Styner, Douglas W
2009-04-27 7:02 ` Andi Kleen
2009-04-28 16:57 ` Chuck Ebbert
2009-04-28 17:15 ` James Bottomley
2009-04-28 17:17 ` Styner, Douglas W
2009-01-13 21:10 Ma, Chinang
2009-01-13 22:44 ` Wilcox, Matthew R
2009-01-15 0:35 ` Andrew Morton
2009-01-15 1:21 ` Matthew Wilcox
2009-01-15 2:04 ` Andrew Morton
2009-01-15 2:27 ` Steven Rostedt
2009-01-15 7:11 ` Ma, Chinang
2009-01-19 18:04 ` Chris Mason
2009-01-19 18:37 ` Steven Rostedt
2009-01-19 18:55 ` Chris Mason
2009-01-19 19:07 ` Steven Rostedt
2009-01-19 23:40 ` Ingo Molnar
2009-01-15 2:39 ` Andi Kleen
2009-01-15 2:47 ` Matthew Wilcox
2009-01-15 3:36 ` Andi Kleen
2009-01-20 13:27 ` Jens Axboe
[not found] ` <588992150B702C48B3312184F1B810AD03A497632C@azsmsx501.amr.corp.intel.com>
2009-01-22 11:29 ` Jens Axboe
[not found] ` <588992150B702C48B3312184F1B810AD03A4F59632@azsmsx501.amr.corp.intel.com>
2009-01-27 8:28 ` Jens Axboe
2009-01-15 7:24 ` Nick Piggin
2009-01-15 9:46 ` Pekka Enberg
2009-01-15 13:52 ` Matthew Wilcox
2009-01-15 14:42 ` Pekka Enberg
2009-01-16 10:16 ` Pekka Enberg
2009-01-16 10:21 ` Nick Piggin
2009-01-16 10:31 ` Pekka Enberg
2009-01-16 10:42 ` Nick Piggin
2009-01-16 10:55 ` Pekka Enberg
2009-01-19 7:13 ` Nick Piggin
2009-01-19 8:05 ` Pekka Enberg
2009-01-19 8:33 ` Nick Piggin
2009-01-19 8:42 ` Nick Piggin
2009-01-19 8:47 ` Pekka Enberg
2009-01-19 8:57 ` Nick Piggin
2009-01-19 9:48 ` Pekka Enberg
2009-01-19 10:03 ` Nick Piggin
2009-01-16 20:59 ` Christoph Lameter
2009-01-16 0:27 ` Andrew Morton
2009-01-16 4:03 ` Nick Piggin
2009-01-16 4:12 ` Andrew Morton
2009-01-16 6:46 ` Nick Piggin
2009-01-16 6:55 ` Matthew Wilcox
2009-01-16 7:06 ` Nick Piggin
2009-01-16 7:53 ` Zhang, Yanmin
2009-01-16 10:20 ` Andi Kleen
2009-01-20 5:16 ` Zhang, Yanmin
2009-01-21 23:58 ` Christoph Lameter
2009-01-22 8:36 ` Zhang, Yanmin
2009-01-22 9:15 ` Pekka Enberg
2009-01-22 9:28 ` Zhang, Yanmin
2009-01-22 9:47 ` Pekka Enberg
2009-01-23 3:02 ` Zhang, Yanmin
2009-01-23 6:52 ` Pekka Enberg
2009-01-23 8:06 ` Pekka Enberg
2009-01-23 8:30 ` Zhang, Yanmin
2009-01-23 8:40 ` Pekka Enberg
2009-01-23 9:46 ` Pekka Enberg
2009-01-23 15:22 ` Christoph Lameter
2009-01-23 15:31 ` Pekka Enberg
2009-01-23 15:55 ` Christoph Lameter
2009-01-23 16:01 ` Pekka Enberg
2009-01-24 2:55 ` Zhang, Yanmin
2009-01-24 7:36 ` Pekka Enberg
2009-02-12 5:22 ` Zhang, Yanmin
2009-02-12 5:47 ` Zhang, Yanmin
2009-02-12 15:25 ` Christoph Lameter
2009-02-12 16:07 ` Pekka Enberg
2009-02-12 16:03 ` Pekka Enberg
2009-01-26 17:36 ` Christoph Lameter
2009-02-01 2:52 ` Zhang, Yanmin
2009-01-23 8:33 ` Nick Piggin
2009-01-23 9:02 ` Zhang, Yanmin
2009-01-16 7:00 ` Andrew Morton
2009-01-16 7:25 ` Nick Piggin
2009-01-16 8:59 ` Nick Piggin
2009-01-16 18:11 ` Rick Jones
2009-01-19 7:43 ` Nick Piggin
2009-01-19 22:19 ` Rick Jones
2009-01-15 14:12 ` James Bottomley
2009-01-15 17:44 ` Andrew Morton
2009-01-15 18:00 ` Matthew Wilcox
2009-01-15 18:14 ` Steven Rostedt
2009-01-15 18:44 ` Gregory Haskins
2009-01-15 18:46 ` Wilcox, Matthew R
2009-01-15 19:44 ` Ma, Chinang
2009-01-16 18:14 ` Gregory Haskins
2009-01-16 19:09 ` Steven Rostedt
2009-01-20 12:45 ` Gregory Haskins
2009-01-15 19:28 ` Ma, Chinang
2009-01-15 16:48 ` Ma, Chinang
2009-01-12 18:30 Ma, Chinang
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