From: William Lee Irwin III <wli@holomorphy.com>
To: Robert Love <rml@tech9.net>
Cc: Con Kolivas <kernel@kolivas.org>,
linux kernel mailing list <linux-kernel@vger.kernel.org>,
Zwane Mwaikambo <zwane@linuxpower.ca>
Subject: Re: [BENCHMARK] 100Hz preempt v nopreempt contest results
Date: Tue, 3 Jun 2003 10:24:31 -0700 [thread overview]
Message-ID: <20030603172431.GW8978@holomorphy.com> (raw)
In-Reply-To: <1054659956.633.85.camel@localhost>
On Mon, 2003-06-02 at 23:39, Con Kolivas wrote:
>> Note this time the ratio is less useful since they are both 100Hz. The
>> difference this time shows a large preempt improvement in process_load much
>> like 1000Hz did. Interestingly, even unloaded kernels no_load and cache_load
>> runs are faster with preempt. Only in xtar_load (repeatedly extracting a tar
>> with multiple small files) was no preempt faster.
On Tue, Jun 03, 2003 at 10:05:58AM -0700, Robert Love wrote:
> Thanks for running these, Con.
> I think this is an example of kernel preemption doing exactly what we
> want it to (improve interactive performance)... probably primarily
> because of the more accurate timeslice distribution.
> Would be interested to figure out why xtar_load is slower.
It would be helpful to get more accurate time accounting a la Mike
Galbraith's patches.
-- wli
prev parent reply other threads:[~2003-06-03 17:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-03 6:39 [BENCHMARK] 100Hz preempt v nopreempt contest results Con Kolivas
2003-06-03 17:05 ` Robert Love
2003-06-03 17:24 ` William Lee Irwin III [this message]
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