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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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      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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