From: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
To: "'Felix Oxley'" <lkml@oxley.org>
Cc: <linux-kernel@vger.kernel.org>
Subject: RE: kernel performance update - 2.6.14
Date: Fri, 28 Oct 2005 17:42:54 -0700 [thread overview]
Message-ID: <200510290042.j9T0gsg28096@unix-os.sc.intel.com> (raw)
In-Reply-To: <4362C255.30600@oxley.org>
Felix Oxley wrote on Friday, October 28, 2005 5:29 PM
> Something went horribly wrong with this test between 2.6.13 and
> 2.6.13-git2 (it has never recovered):
>
> System: 4P Itanium
> Test:Result Group 1
> Metric: VolcanoMark
> Result: -3% -10%
> Kernel: 2.6.13 vs 2.6.13-git2
>
> Does anybody know the cause of this?
Search the archive, it was discussed here:
http://marc.theaimsgroup.com/?l=linux-ia64&m=112683124124723&w=2
It is not because of changes in 2.6.13-git2. It would've shown on
2.6.13-rc1 when default hz rate was switched to 250. I happened
to audit the system at that time and made the hz switch (from 1000
to 250 and the problem showed up.
More discussion here:
http://marc.theaimsgroup.com/?l=linux-kernel&m=112854723926854&w=2
- Ken
next prev parent reply other threads:[~2005-10-29 0:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-28 23:44 Chen, Kenneth W
2005-10-28 23:54 ` Jeff Garzik
2005-10-28 22:43 ` Jeff V. Merkey
2005-10-29 2:49 ` Nick Piggin
2005-10-29 3:06 ` jmerkey
2005-10-29 3:08 ` jmerkey
2005-10-29 3:15 ` jmerkey
2005-10-29 8:38 ` Nick Piggin
2005-10-29 0:04 ` Chen, Kenneth W
2005-10-29 0:19 ` Felix Oxley
2005-10-29 0:29 ` Felix Oxley
2005-10-29 0:42 ` Chen, Kenneth W [this message]
2005-10-29 11:17 ` Dr. David Alan Gilbert
2005-10-29 0:29 ` Chen, Kenneth W
2005-11-08 0:04 Chen, Tim C
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