From: Bill Davidsen <davidsen@tmr.com>
To: Matthew Hodgson <matthew@mxtelecom.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Toggling preemption on a running kernel
Date: Fri, 07 Mar 2008 13:46:51 -0500 [thread overview]
Message-ID: <47D18D9B.9080907@tmr.com> (raw)
In-Reply-To: <47D086A4.6090103@mxtelecom.com>
Matthew Hodgson wrote:
> Hi,
>
> I'm trying to compare the performance of some networking code
> (throughput and latency when receiving various volumes of UDP streams)
> between a preemptible and non-preemptible 2.6.24 kernel, and was
> wondering if it is possible to temporarily disable preemption on a
> running preemptible kernel. Is it just a matter of loading a module
> which calls preempt_enable() at load and preempt_disable() at unload -
> or is that too naive? Is there an existing way of doing this?
>
That wouldn't get rid of all the code to support preempt, so it wouldn't
be useful for comparing much of anything. I think you need to build two
identical kernels here, with only one difference.
--
Bill Davidsen <davidsen@tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
prev parent reply other threads:[~2008-03-07 18:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-07 0:04 Toggling preemption on a running kernel Matthew Hodgson
2008-03-07 18:46 ` Bill Davidsen [this message]
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