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: Wed, 23 Jan 2013 16:30:10 +0800 [thread overview]
Message-ID: <50FF9F92.60202@linux.vnet.ibm.com> (raw)
In-Reply-To: <1358929257.5752.109.camel@marge.simpson.net>
On 01/23/2013 04:20 PM, Mike Galbraith wrote:
> On Wed, 2013-01-23 at 15:10 +0800, Michael Wang wrote:
>> On 01/23/2013 02:28 PM, Mike Galbraith wrote:
>
>>> Abbreviated test run:
>>> Tasks jobs/min jti jobs/min/task real cpu
>>> 640 158044.01 81 246.9438 24.54 577.66 Wed Jan 23 07:14:33 2013
>>> 1280 50434.33 39 39.4018 153.80 5737.57 Wed Jan 23 07:17:07 2013
>>> 2560 47214.07 34 18.4430 328.58 12715.56 Wed Jan 23 07:22:36 2013
>>
>> So still not works... and not going to balance path while waking up will
>> fix it, looks like that's the only choice if no error on balance path
>> could be found...benchmark wins again, I'm feeling bad...
>>
>> I will conclude the info we collected and make a v3 later.
>
> FWIW, I hacked virgin to do full balance if an idle CPU was not found,
> leaving the preference to wake cache affine intact though, turned on
> WAKE_BALANCE in all domains, and it did not collapse. In fact, the high
> load end, where the idle search will frequently be a waste of cycles,
> actually improved a bit. Things that make ya go hmmm.
Oh, does that means the old balance path is good while the new is really
broken, I mean, compared this with the previously results, could we say
that all the collapse was just caused by the change of balance path?
Regards,
Michael Wang
>
> Tasks jobs/min jti jobs/min/task real cpu
> 1 436.60 100 436.5994 13.88 3.80 Wed Jan 23 08:49:21 2013
> 1 437.23 100 437.2294 13.86 3.85 Wed Jan 23 08:49:45 2013
> 1 440.41 100 440.4070 13.76 3.76 Wed Jan 23 08:50:08 2013
> 5 2463.41 99 492.6829 12.30 10.90 Wed Jan 23 08:50:22 2013
> 5 2427.88 99 485.5769 12.48 11.90 Wed Jan 23 08:50:37 2013
> 5 2431.78 99 486.3563 12.46 11.74 Wed Jan 23 08:50:51 2013
> 10 4867.47 99 486.7470 12.45 23.30 Wed Jan 23 08:51:05 2013
> 10 4855.77 99 485.5769 12.48 23.35 Wed Jan 23 08:51:18 2013
> 10 4891.04 99 489.1041 12.39 22.71 Wed Jan 23 08:51:31 2013
> 20 9789.98 96 489.4992 12.38 36.18 Wed Jan 23 08:51:44 2013
> 20 9774.19 97 488.7097 12.40 39.58 Wed Jan 23 08:51:56 2013
> 20 9774.19 97 488.7097 12.40 37.99 Wed Jan 23 08:52:09 2013
> 40 19086.61 98 477.1654 12.70 89.56 Wed Jan 23 08:52:22 2013
> 40 19116.72 98 477.9180 12.68 92.69 Wed Jan 23 08:52:35 2013
> 40 19056.60 98 476.4151 12.72 90.19 Wed Jan 23 08:52:48 2013
> 80 37149.43 98 464.3678 13.05 114.19 Wed Jan 23 08:53:01 2013
> 80 37436.29 98 467.9537 12.95 111.54 Wed Jan 23 08:53:14 2013
> 80 37206.45 98 465.0806 13.03 111.49 Wed Jan 23 08:53:27 2013
> 160 69605.17 97 435.0323 13.93 152.35 Wed Jan 23 08:53:41 2013
> 160 69705.25 97 435.6578 13.91 152.05 Wed Jan 23 08:53:55 2013
> 160 69356.22 97 433.4764 13.98 154.56 Wed Jan 23 08:54:09 2013
> 320 112482.60 94 351.5081 17.24 285.52 Wed Jan 23 08:54:27 2013
> 320 112222.22 94 350.6944 17.28 287.80 Wed Jan 23 08:54:44 2013
> 320 109994.33 97 343.7323 17.63 302.40 Wed Jan 23 08:55:02 2013
> 640 152273.26 94 237.9270 25.47 614.95 Wed Jan 23 08:55:27 2013
> 640 153175.36 96 239.3365 25.32 608.48 Wed Jan 23 08:55:53 2013
> 640 152994.08 95 239.0533 25.35 609.33 Wed Jan 23 08:56:18 2013
> 1280 191101.26 95 149.2979 40.59 1218.71 Wed Jan 23 08:56:59 2013
> 1280 191667.90 94 149.7405 40.47 1215.06 Wed Jan 23 08:57:40 2013
> 1280 191289.77 94 149.4451 40.55 1217.35 Wed Jan 23 08:58:20 2013
> 2560 221654.52 94 86.5838 69.99 2392.78 Wed Jan 23 08:59:31 2013
> 2560 221117.45 91 86.3740 70.16 2399.01 Wed Jan 23 09:00:41 2013
> 2560 220394.94 93 86.0918 70.39 2409.10 Wed Jan 23 09:01:52 2013
>
>
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next prev parent reply other threads:[~2013-01-23 8:30 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 [this message]
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
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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