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From: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
To: Hu Tao <hutao@cn.fujitsu.com>
Cc: Paul Turner <pjt@google.com>,
	linux-kernel@vger.kernel.org,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Bharata B Rao <bharata@linux.vnet.ibm.com>,
	Dhaval Giani <dhaval.giani@gmail.com>,
	Balbir Singh <balbir@linux.vnet.ibm.com>,
	Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
	Srivatsa Vaddagiri <vatsa@in.ibm.co>
Subject: Re: [patch 00/15] CFS Bandwidth Control V6
Date: Thu, 16 Jun 2011 09:57:09 +0900	[thread overview]
Message-ID: <4DF954E5.9060704@jp.fujitsu.com> (raw)
In-Reply-To: <20110615083749.GA14200@localhost.localdomain>

(2011/06/15 17:37), Hu Tao wrote:
> On Tue, Jun 14, 2011 at 04:29:49PM +0900, Hidetoshi Seto wrote:
>> (2011/06/14 15:58), Hu Tao wrote:
>>> Hi,
>>>
>>> I've run several tests including hackbench, unixbench, massive-intr
>>> and kernel building. CPU is Intel(R) Xeon(R) CPU X3430  @ 2.40GHz,
>>> 4 cores, and 4G memory.
>>>
>>> Most of the time the results differ few, but there are problems:
>>>
>>> 1. unixbench: execl throughout has about 5% drop.
>>> 2. unixbench: process creation has about 5% drop.
>>> 3. massive-intr: when running 200 processes for 5mins, the number
>>>    of loops each process runs differ more than before cfs-bandwidth-v6.
>>>
>>> The results are attached.
>>
>> I know the score of unixbench is not so stable that the problem might
>> be noises ... but the result of massive-intr is interesting.
>> Could you give a try to find which piece (xx/15) in the series cause
>> the problems?
> 
> After more tests, I found massive-intr data is not stable, too. Results
> are attached. The third number in file name means which patchs are
> applied, 0 means no patch applied. plot.sh is easy to generate png
> files.

(Though I don't know what the 16th patch of this series is, anyway)
I see that the results of 15, 15-1 and 15-2 are very different and that
15-2 is similar to without-patch.

One concern is whether this unstable of data is really caused by the
nature of your test (hardware, massive-intr itself and something running
in background etc.) or by a hidden piece in the bandwidth patch set.
Did you see "not stable" data when none of patches is applied?
If not, which patch makes it unstable?


Thanks,
H.Seto


  reply	other threads:[~2011-06-16  0:58 UTC|newest]

Thread overview: 129+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-03  9:28 [patch 00/15] CFS Bandwidth Control V6 Paul Turner
2011-05-03  9:28 ` [patch 01/15] sched: (fixlet) dont update shares twice on on_rq parent Paul Turner
2011-05-10  7:14   ` Hidetoshi Seto
2011-05-10  8:32     ` Mike Galbraith
2011-05-11  7:55       ` Hidetoshi Seto
2011-05-11  8:13         ` Paul Turner
2011-05-11  8:45           ` Mike Galbraith
2011-05-11  8:59             ` Hidetoshi Seto
2011-05-03  9:28 ` [patch 02/15] sched: hierarchical task accounting for SCHED_OTHER Paul Turner
2011-05-10  7:17   ` Hidetoshi Seto
2011-05-03  9:28 ` [patch 03/15] sched: introduce primitives to account for CFS bandwidth tracking Paul Turner
2011-05-10  7:18   ` Hidetoshi Seto
2011-05-03  9:28 ` [patch 04/15] sched: validate CFS quota hierarchies Paul Turner
2011-05-10  7:20   ` Hidetoshi Seto
2011-05-11  9:37     ` Paul Turner
2011-05-16  9:30   ` Peter Zijlstra
2011-05-16  9:43   ` Peter Zijlstra
2011-05-16 12:32     ` Paul Turner
2011-05-17 15:26       ` Peter Zijlstra
2011-05-18  7:16         ` Paul Turner
2011-05-18 11:57           ` Peter Zijlstra
2011-05-03  9:28 ` [patch 05/15] sched: add a timer to handle CFS bandwidth refresh Paul Turner
2011-05-10  7:21   ` Hidetoshi Seto
2011-05-11  9:27     ` Paul Turner
2011-05-16 10:18   ` Peter Zijlstra
2011-05-16 12:56     ` Paul Turner
2011-05-03  9:28 ` [patch 06/15] sched: accumulate per-cfs_rq cpu usage and charge against bandwidth Paul Turner
2011-05-10  7:22   ` Hidetoshi Seto
2011-05-11  9:25     ` Paul Turner
2011-05-16 10:27   ` Peter Zijlstra
2011-05-16 12:59     ` Paul Turner
2011-05-17 15:28       ` Peter Zijlstra
2011-05-18  7:02         ` Paul Turner
2011-05-16 10:32   ` Peter Zijlstra
2011-05-03  9:28 ` [patch 07/15] sched: expire invalid runtime Paul Turner
2011-05-10  7:22   ` Hidetoshi Seto
2011-05-16 11:05   ` Peter Zijlstra
2011-05-16 11:07   ` Peter Zijlstra
2011-05-03  9:28 ` [patch 08/15] sched: throttle cfs_rq entities which exceed their local runtime Paul Turner
2011-05-10  7:23   ` Hidetoshi Seto
2011-05-16 15:58   ` Peter Zijlstra
2011-05-16 16:05   ` Peter Zijlstra
2011-05-03  9:28 ` [patch 09/15] sched: unthrottle cfs_rq(s) who ran out of quota at period refresh Paul Turner
2011-05-10  7:24   ` Hidetoshi Seto
2011-05-11  9:24     ` Paul Turner
2011-05-03  9:28 ` [patch 10/15] sched: allow for positional tg_tree walks Paul Turner
2011-05-10  7:24   ` Hidetoshi Seto
2011-05-17 13:31   ` Peter Zijlstra
2011-05-18  7:18     ` Paul Turner
2011-05-03  9:28 ` [patch 11/15] sched: prevent interactions between throttled entities and load-balance Paul Turner
2011-05-10  7:26   ` Hidetoshi Seto
2011-05-11  9:11     ` Paul Turner
2011-05-03  9:28 ` [patch 12/15] sched: migrate throttled tasks on HOTPLUG Paul Turner
2011-05-10  7:27   ` Hidetoshi Seto
2011-05-11  9:10     ` Paul Turner
2011-05-03  9:28 ` [patch 13/15] sched: add exports tracking cfs bandwidth control statistics Paul Turner
2011-05-10  7:27   ` Hidetoshi Seto
2011-05-11  7:56   ` Hidetoshi Seto
2011-05-11  9:09     ` Paul Turner
2011-05-03  9:29 ` [patch 14/15] sched: return unused runtime on voluntary sleep Paul Turner
2011-05-10  7:28   ` Hidetoshi Seto
2011-05-03  9:29 ` [patch 15/15] sched: add documentation for bandwidth control Paul Turner
2011-05-10  7:29   ` Hidetoshi Seto
2011-05-11  9:09     ` Paul Turner
2011-06-07 15:45 ` CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinned Kamalesh Babulal
2011-06-08  3:09   ` Paul Turner
2011-06-08 10:46   ` Vladimir Davydov
2011-06-08 16:32     ` Kamalesh Babulal
2011-06-09  3:25       ` Paul Turner
2011-06-10 18:17         ` Kamalesh Babulal
2011-06-14  0:00           ` Paul Turner
2011-06-15  5:37             ` Kamalesh Babulal
2011-06-21 19:48               ` Paul Turner
2011-06-24 15:05                 ` Kamalesh Babulal
2011-09-07 11:00                 ` Srivatsa Vaddagiri
2011-09-07 14:54                 ` Srivatsa Vaddagiri
2011-09-07 15:20                 ` CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinnede Srivatsa Vaddagiri
2011-09-07 19:22                   ` Peter Zijlstra
2011-09-08 15:15                     ` Srivatsa Vaddagiri
2011-09-09 12:31                       ` Peter Zijlstra
2011-09-09 13:26                         ` Srivatsa Vaddagiri
2011-09-12 10:17                         ` Srivatsa Vaddagiri
2011-09-12 12:35                           ` Peter Zijlstra
2011-09-13  4:15                             ` Srivatsa Vaddagiri
2011-09-13  5:03                               ` Srivatsa Vaddagiri
2011-09-13  5:05                                 ` Srivatsa Vaddagiri
2011-09-13  9:39                                 ` Peter Zijlstra
2011-09-13 11:28                                   ` Srivatsa Vaddagiri
2011-09-13 14:07                                     ` Peter Zijlstra
2011-09-13 16:21                                       ` Srivatsa Vaddagiri
2011-09-13 16:33                                         ` Peter Zijlstra
2011-09-13 17:41                                           ` Srivatsa Vaddagiri
2011-09-13 16:36                                         ` Peter Zijlstra
2011-09-13 17:54                                           ` Srivatsa Vaddagiri
2011-09-13 18:03                                             ` Peter Zijlstra
2011-09-13 18:12                                               ` Srivatsa Vaddagiri
2011-09-13 18:07                                             ` Peter Zijlstra
2011-09-13 18:19                                             ` Peter Zijlstra
2011-09-13 18:28                                               ` Srivatsa Vaddagiri
2011-09-13 18:30                                                 ` Peter Zijlstra
2011-09-13 18:35                                                   ` Srivatsa Vaddagiri
2011-09-15 17:55                                                     ` Kamalesh Babulal
2011-09-15 21:48                                                       ` Peter Zijlstra
2011-09-19 17:51                                                         ` Kamalesh Babulal
2011-09-20  0:38                                                           ` Venki Pallipadi
2011-09-20 11:09                                                             ` Kamalesh Babulal
2011-09-20 13:56                                                           ` Peter Zijlstra
2011-09-20 14:04                                                           ` Peter Zijlstra
2011-09-20 12:55                                                       ` Peter Zijlstra
2011-09-21 17:34                                                         ` Kamalesh Babulal
2011-09-13 14:19                               ` Peter Zijlstra
2011-09-13 18:01                                 ` Srivatsa Vaddagiri
2011-09-13 18:23                                   ` Peter Zijlstra
2011-09-16  8:14                                     ` Paul Turner
2011-09-16  8:28                                       ` Peter Zijlstra
2011-09-19 16:35                                         ` Srivatsa Vaddagiri
2011-09-16  8:22                   ` Paul Turner
2011-06-14 10:16   ` CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinned Hidetoshi Seto
2011-06-14  6:58 ` [patch 00/15] CFS Bandwidth Control V6 Hu Tao
2011-06-14  7:29   ` Hidetoshi Seto
2011-06-14  7:44     ` Hu Tao
2011-06-15  8:37     ` Hu Tao
2011-06-16  0:57       ` Hidetoshi Seto [this message]
2011-06-16  9:45         ` Hu Tao
2011-06-17  1:22           ` Hidetoshi Seto
2011-06-17  6:05             ` Hu Tao
2011-06-17  6:25             ` Paul Turner
2011-06-17  9:13               ` Hidetoshi Seto
2011-06-18  0:28                 ` Paul Turner

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