From: Tim Chen <tim.c.chen@linux.intel.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.19-rc1: Slowdown in lmbench's fork
Date: Thu, 02 Nov 2006 10:34:13 -0800 [thread overview]
Message-ID: <1162492453.10806.75.camel@localhost.localdomain> (raw)
In-Reply-To: <m1d5851yxd.fsf@ebiederm.dsl.xmission.com>
On Thu, 2006-11-02 at 11:33 -0700, Eric W. Biederman wrote:
>
> My only partial guess is that it might be worth adding the per cpu
> variables my patch adds without any of the corresponding code changes.
> And see if adding variables to the per cpu area is what is causing the
> change.
>
> The two tests I can see in this line are:
> - to add the percpu vector_irq variable.
> - to increase NR_IRQs.
Increasing the NR_IRQs resulted in the regression.
Adding the percpu vector_irq variable did not cause any changes.
Tim
next prev parent reply other threads:[~2006-11-02 19:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-02 16:44 2.6.19-rc1: Slowdown in lmbench's fork Tim Chen
2006-11-02 18:33 ` Eric W. Biederman
2006-11-02 18:34 ` Tim Chen [this message]
2006-11-03 2:11 ` 2.6.19-rc1: x86_64 slowdown " Adrian Bunk
2006-11-03 9:08 ` Eric W. Biederman
2006-11-03 16:10 ` Tim Chen
2006-11-03 17:35 ` Eric W. Biederman
2006-11-03 17:47 ` Andi Kleen
2006-11-03 18:18 ` Eric W. Biederman
2006-11-03 18:39 ` Andi Kleen
2006-11-03 20:25 ` Tim Chen
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