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 17:26:29 +0800 [thread overview]
Message-ID: <50FFACC5.7060405@linux.vnet.ibm.com> (raw)
In-Reply-To: <1358932694.5752.126.camel@marge.simpson.net>
On 01/23/2013 05:18 PM, Mike Galbraith wrote:
> On Wed, 2013-01-23 at 17:00 +0800, Michael Wang wrote:
>> On 01/23/2013 04:49 PM, Mike Galbraith wrote:
>>> On Wed, 2013-01-23 at 16:30 +0800, Michael Wang wrote:
>>>> 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?
>>>
>>> That's a good supposition. I'll see if it holds.
>>
>> I just notice that there is no sd support the WAKE flag at all according
>> to your debug info, isn't it?
>
> There is, I turned it on in all domains.
So is the debug info show the changes? May be I missed some timing which
need to rebuild the sbm.
Regards,
Michael Wang
>
> -Mike
>
next prev parent reply other threads:[~2013-01-23 9:26 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 [this message]
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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