From: Michael Wang <wangyun@linux.vnet.ibm.com>
To: Mike Galbraith <bitbucket@online.de>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com,
peterz@infradead.org, mingo@kernel.org, a.p.zijlstra@chello.nl
Subject: Re: [RFC PATCH 0/2] sched: simplify the select_task_rq_fair()
Date: Mon, 21 Jan 2013 16:46:20 +0800 [thread overview]
Message-ID: <50FD005C.8040402@linux.vnet.ibm.com> (raw)
In-Reply-To: <1358756780.4994.104.camel@marge.simpson.net>
On 01/21/2013 04:26 PM, Mike Galbraith wrote:
> On Mon, 2013-01-21 at 15:34 +0800, Michael Wang wrote:
>> On 01/21/2013 02:42 PM, Mike Galbraith wrote:
>>> On Mon, 2013-01-21 at 13:07 +0800, Michael Wang wrote:
>>>
>>>> That seems like the default one, could you please show me the numbers in
>>>> your datapoint file?
>>>
>>> Yup, I do not touch the workfile. Datapoints is what you see in the
>>> tabulated result...
>>>
>>> 1
>>> 1
>>> 1
>>> 5
>>> 5
>>> 5
>>> 10
>>> 10
>>> 10
>>> ...
>>>
>>> so it does three consecutive runs at each load level. I quiesce the
>>> box, set governor to performance, echo 250 32000 32 4096
>>>> /proc/sys/kernel/sem, then ./multitask -nl -f, and point it
>>> at ./datapoints.
>>
>> I have changed the "/proc/sys/kernel/sem" to:
>>
>> 2000 2048000 256 1024
>>
>> and run few rounds, seems like I can't reproduce this issue on my 12 cpu
>> X86 server:
>>
>> prev post
>> Tasks jobs/min jobs/min
>> 1 508.39 506.69
>> 5 2792.63 2792.63
>> 10 5454.55 5449.64
>> 20 10262.49 10271.19
>> 40 18089.55 18184.55
>> 80 28995.22 28960.57
>> 160 41365.19 41613.73
>> 320 53099.67 52767.35
>> 640 61308.88 61483.83
>> 1280 66707.95 66484.96
>> 2560 69736.58 69350.02
>>
>> Almost nothing changed...I would like to find another machine and do the
>> test again later.
>
> Hm. Those numbers look odd. Ok, I've got 8 more cores, but your hefty
> load throughput is low. When I look low end numbers, seems your cores
> are more macho than my 2.27 GHz EX cores, so it should have been a lot
> closer. Oh wait, you said "12 cpu".. so 1 6 core package + HT? This
> box is 2 NUMA nodes (was 4), 2 (was 4) 10 core packages + HT.
It's a 12 core package, and only 1 physical cpu:
Intel(R) Xeon(R) CPU X5690 @ 3.47GHz
So does that means the issue was related to the case when there are
multiple nodes?
Regards,
Michael Wang
>
> -Mike
>
> --
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next prev parent reply other threads:[~2013-01-21 8:46 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1356588535-23251-1-git-send-email-wangyun@linux.vnet.ibm.com>
2013-01-09 9:28 ` [RFC PATCH 0/2] sched: simplify the select_task_rq_fair() Michael Wang
2013-01-12 8:01 ` Mike Galbraith
2013-01-12 10:19 ` Mike Galbraith
2013-01-14 9:21 ` Mike Galbraith
2013-01-15 3:10 ` Michael Wang
2013-01-15 4:52 ` Mike Galbraith
2013-01-15 8:26 ` Michael Wang
2013-01-17 5:55 ` Michael Wang
2013-01-20 4:09 ` Mike Galbraith
2013-01-21 2:50 ` Michael Wang
2013-01-21 4:38 ` Mike Galbraith
2013-01-21 5:07 ` Michael Wang
2013-01-21 6:42 ` Mike Galbraith
2013-01-21 7:09 ` Mike Galbraith
2013-01-21 7:45 ` Michael Wang
2013-01-21 9:09 ` Mike Galbraith
2013-01-21 9:22 ` Michael Wang
2013-01-21 9:44 ` Mike Galbraith
2013-01-21 10:30 ` Mike Galbraith
2013-01-22 3:43 ` Michael Wang
2013-01-22 8:03 ` Mike Galbraith
2013-01-22 8:56 ` Michael Wang
2013-01-22 11:34 ` Mike Galbraith
2013-01-23 3:01 ` Michael Wang
2013-01-23 5:02 ` Mike Galbraith
2013-01-22 14:41 ` Mike Galbraith
2013-01-23 2:44 ` Michael Wang
2013-01-23 4:31 ` Mike Galbraith
2013-01-23 5:09 ` Michael Wang
2013-01-23 6:28 ` Mike Galbraith
2013-01-23 7:10 ` Michael Wang
2013-01-23 8:20 ` Mike Galbraith
2013-01-23 8:30 ` Michael Wang
2013-01-23 8:49 ` Mike Galbraith
2013-01-23 9:00 ` Michael Wang
2013-01-23 9:18 ` Mike Galbraith
2013-01-23 9:26 ` Michael Wang
2013-01-23 9:37 ` Mike Galbraith
2013-01-23 9:32 ` Mike Galbraith
2013-01-24 6:01 ` Michael Wang
2013-01-24 6:51 ` Mike Galbraith
2013-01-24 7:15 ` Michael Wang
2013-01-24 7:47 ` Mike Galbraith
2013-01-24 8:14 ` Michael Wang
2013-01-24 9:07 ` Mike Galbraith
2013-01-24 9:26 ` Michael Wang
2013-01-24 10:34 ` Mike Galbraith
2013-01-25 2:14 ` Michael Wang
2013-01-24 7:00 ` Michael Wang
2013-01-21 7:34 ` Michael Wang
2013-01-21 8:26 ` Mike Galbraith
2013-01-21 8:46 ` Michael Wang [this message]
2013-01-21 9:11 ` Mike Galbraith
2013-01-15 2:46 ` Michael Wang
2013-01-11 8:15 Michael Wang
2013-01-11 10:13 ` Nikunj A Dadhania
2013-01-15 2:20 ` Michael Wang
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