Date: Sun, 20 Mar 2005 09:00:33 -0800
From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Scheduling changes in -mm tree
Message-ID: <533200000.1111338032@[10.10.2.4]>
In-Reply-To: <20050319140754.23d76496.akpm@osdl.org>
References: <505920000.1111249137@[10.10.2.4]> <20050319140754.23d76496.akpm@osdl.org>
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--Andrew Morton <akpm@osdl.org> wrote (on Saturday, March 19, 2005 14:07:54 -0800):

> "Martin J. Bligh" <mbligh@aracnet.com> wrote:
>> 
>> I don't think these are doing much for performance. Or at least 
>> *something* in your tree isn't ...
>> 
>> Kernbench: 
>>                                      Elapsed    System      User       CPU
>>  elm3b67      2.6.11                   50.24    146.60   1117.61   2516.67
>>  elm3b67      2.6.11-mm1               52.27    141.14   1099.91   2374.33
>>  elm3b67      2.6.11-mm2               51.88    142.41   1104.85   2403.67
>>  elm3b67      2.6.11-mm4               51.23    145.04   1100.70   2431.00
>> 
>> (elm3b67 is a 16x x440 ia32 NUMA system + HT)
> 
> Sounds like the CPU scheduler, yes
> 
>> Is there an easy way to just test those sched changes alone?
> 
> Nick has tossed out and redone all the scheduler patches from -mm4, but I
> assume it's all pretty much the same.
> 
> At http://www.zip.com.au/~akpm/linux/patches/stuff/mbligh.gz is a rollup
> (against 2.6.12-rc1) of

Kernbench: 
                                    Elapsed    System      User       CPU
elm3b67      2.6.12-rc1               49.02    147.91   1105.49   2556.00
elm3b67      mbligh                   52.30    142.24   1105.83   2385.33

That doesn't seem like an improvement ;-) (last run is just adding above patch)
I'll try to get you results on a couple more machines, but I'm fighting
with the test harness to get it to behave (plus I now have to rerun all
the tests with CONFIG_BROKEN turned on to get CONFIG_SCSI_QLOGIC_ISP to 
work).

M.

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