From: James Bottomley <James.Bottomley@SteelEye.com>
To: Ryan Bradetich <rbradetich@uswest.net>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] Measuring kernel compile times on smp system.
Date: Thu, 27 Oct 2005 21:55:23 -0500 [thread overview]
Message-ID: <1130468124.9453.17.camel@mulgrave> (raw)
In-Reply-To: <1130389617.31977.16.camel@localhost.localdomain>
On Wed, 2005-10-26 at 23:06 -0600, Ryan Bradetich wrote:
> K460-smp(3):
> cold 44m36.961s 93m25.844s 35m37.427s
> warm 44m19.736s 93m9.127s 35m49.683s
>
> K460-smp(4):
> cold 41m59.795s 114m6.654s 46m20.045s
> warm 41m39.792s 114m29.156s 46m6.385s
that's pretty bad 3->4 scaling.
Could you just check that you don't have irqbalanced running. On a K or
D system, it would cause great inefficiencies in interrupt rethrowing.
Thanks,
James
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prev parent reply other threads:[~2005-10-28 2:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1130389617.31977.16.camel@localhost.localdomain>
[not found] ` <20051027201333.GA3107@netfall.com>
2005-10-28 2:08 ` [parisc-linux] Measuring kernel compile times on smp system Randolph Chung
2005-10-28 3:19 ` Matthew Wilcox
[not found] ` <1130543952.20233.10.camel@localhost.localdomain>
[not found] ` <1130563229.20233.19.camel@localhost.localdomain>
[not found] ` <4363E43D.5030208@tiscali.be>
[not found] ` <20051029214456.GB6550@parisc-linux.org>
[not found] ` <4363FBD4.9000003@tiscali.be>
[not found] ` <20051030000253.GA11807@colo.lackof.org>
2005-10-30 15:25 ` [parisc-linux] Question about ccio and fdc request: Matthew Wilcox
2005-10-28 2:55 ` James Bottomley [this message]
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