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From: William Lee Irwin III <wli@holomorphy.com>
To: Phy Prabab <phyprabab@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Help understanding slow down
Date: Sun, 23 May 2004 18:04:55 -0700	[thread overview]
Message-ID: <20040524010455.GJ1833@holomorphy.com> (raw)
In-Reply-To: <20040524005751.62303.qmail@web90006.mail.scd.yahoo.com>

On Sun, May 23, 2004 at 05:57:51PM -0700, Phy Prabab wrote:
> Just for more clarification, here is a perfect
> example:
> 2.6.7-p1:
> 24.86user 51.77system 2:58.87elapsed 42%CPU
> (0avgtext+0avgdata 0maxresident)k
> 0inputs+0outputs (13major+7591686minor)pagefaults
> 0swaps
> 2.4.21:
> 28.68user 34.98system 1:12.34elapsed 87%CPU
> (0avgtext+0avgdata 0maxresident)k
> 0inputs+0outputs (5691267major+1130523minor)pagefaults
> 0swaps

Thanks. This reveals that the performance regression is system time.
Could you please rerun the 2.6.7-rc1 test with kernel profiling on,
and reset the profile buffer prior just prior to the run?

This is the kernel command line option profile=1, and then as root,
echo 1 > /proc/profile just prior to the run.


-- wli

  reply	other threads:[~2004-05-24  1:06 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-05-24  0:32 Help understanding slow down Phy Prabab
2004-05-24  0:57 ` Phy Prabab
2004-05-24  1:04   ` William Lee Irwin III [this message]
2004-05-24  1:25     ` Jakob Oestergaard
2004-05-24  1:28       ` William Lee Irwin III
2004-05-24  1:51         ` Phy Prabab
2004-05-24  2:42           ` Nick Piggin
2004-05-24  2:43           ` Andrew Morton
2004-05-24  6:23             ` Phy Prabab
2004-05-24  6:27               ` William Lee Irwin III
2004-05-24  6:39                 ` Phy Prabab
2004-05-24  7:21                   ` Phy Prabab
2004-05-24  7:44                     ` Nick Piggin
2004-05-24  7:50                       ` Phy Prabab
2004-05-24  7:59                         ` Nick Piggin
2004-05-24 10:43                           ` Jakob Oestergaard
2004-05-24 14:13                     ` Martin J. Bligh
2004-05-24  7:53                   ` Andrew Morton
2004-05-24  8:00                     ` Phy Prabab
2004-05-25 10:32                     ` Ingo Molnar
2004-05-25  9:29                       ` Andrew Morton
2004-05-25 11:42                         ` Ingo Molnar
2004-05-25  9:58                           ` Andrew Morton
2004-05-25 12:25                             ` Ingo Molnar
2004-05-24  6:33   ` Paul Rolland
2004-05-24 17:28     ` Roger Luethi
  -- strict thread matches above, loose matches on Subject: below --
2004-05-24  1:37 Robert M. Stockmann
2004-05-24  1:50 ` Phy Prabab
2004-05-24  3:31 ` Robert M. Stockmann
2004-05-24  6:14   ` Phy Prabab
2004-05-24 18:36     ` Robert M. Stockmann

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