From: Arjan van de Ven <arjan@linux.intel.com>
To: Borislav Petkov <bp@alien8.de>, Alex Shi <alex.shi@intel.com>,
Alex Shi <lkml.alex@gmail.com>,
rob@landley.net, mingo@redhat.com, peterz@infradead.org,
gregkh@linuxfoundation.org, andre.przywara@amd.com, rjw@sisk.pl,
paul.gortmaker@windriver.com, akpm@linux-foundation.org,
paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
pjt@google.com, vincent.guittot@linaro.org,
Preeti U Murthy <preeti@linux.vnet.ibm.com>
Subject: Re: [PATCH 0/18] sched: simplified fork, enable load average into LB and power awareness scheduling
Date: Tue, 11 Dec 2012 08:03:01 -0800 [thread overview]
Message-ID: <50C75935.1040004@linux.intel.com> (raw)
In-Reply-To: <20121211154819.GC8873@liondog.tnic>
On 12/11/2012 7:48 AM, Borislav Petkov wrote:
> On Tue, Dec 11, 2012 at 08:10:20PM +0800, Alex Shi wrote:
>> Another testing of parallel compress with pigz on Linus' git tree.
>> results show we get much better performance/power with powersaving and
>> balance policy:
>>
>> testing command:
>> #pigz -k -c -p$x -r linux* &> /dev/null
>>
>> On a NHM EP box
>> powersaving balance performance
>> x = 4 166.516 /88 68 170.515 /82 71 165.283 /103 58
>> x = 8 173.654 /61 94 177.693 /60 93 172.31 /76 76
>
> This looks funny: so "performance" is eating less watts than
> "powersaving" and "balance" on NHM. Could it be that the average watts
> measurements on NHM are not correct/precise..? On SNB they look as
> expected, according to your scheme.
well... it's not always beneficial to group or to spread out
it depends on cache behavior mostly which is best
next prev parent reply other threads:[~2012-12-11 16:03 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-10 8:22 [PATCH 0/18] sched: simplified fork, enable load average into LB and power awareness scheduling Alex Shi
2012-12-10 8:22 ` [PATCH 01/18] sched: select_task_rq_fair clean up Alex Shi
2012-12-11 4:23 ` Preeti U Murthy
2012-12-11 5:28 ` Alex Shi
2012-12-11 6:30 ` Preeti U Murthy
2012-12-11 11:53 ` Alex Shi
2012-12-12 5:26 ` Preeti U Murthy
2012-12-21 4:28 ` Namhyung Kim
2012-12-23 12:17 ` Alex Shi
2012-12-10 8:22 ` [PATCH 02/18] sched: fix find_idlest_group mess logical Alex Shi
2012-12-11 5:08 ` Preeti U Murthy
2012-12-11 5:29 ` Alex Shi
2012-12-11 5:50 ` Preeti U Murthy
2012-12-11 11:55 ` Alex Shi
2012-12-10 8:22 ` [PATCH 03/18] sched: don't need go to smaller sched domain Alex Shi
2012-12-10 8:22 ` [PATCH 04/18] sched: remove domain iterations in fork/exec/wake Alex Shi
2012-12-10 8:22 ` [PATCH 05/18] sched: load tracking bug fix Alex Shi
2012-12-10 8:22 ` [PATCH 06/18] sched: set initial load avg of new forked task as its load weight Alex Shi
2012-12-21 4:33 ` Namhyung Kim
2012-12-23 12:00 ` Alex Shi
2012-12-10 8:22 ` [PATCH 07/18] sched: compute runnable load avg in cpu_load and cpu_avg_load_per_task Alex Shi
2012-12-12 3:57 ` Preeti U Murthy
2012-12-12 5:52 ` Alex Shi
2012-12-13 8:45 ` Alex Shi
2012-12-21 4:35 ` Namhyung Kim
2012-12-23 11:42 ` Alex Shi
2012-12-10 8:22 ` [PATCH 08/18] sched: consider runnable load average in move_tasks Alex Shi
2012-12-12 4:41 ` Preeti U Murthy
2012-12-12 6:26 ` Alex Shi
2012-12-21 4:43 ` Namhyung Kim
2012-12-23 12:29 ` Alex Shi
2012-12-10 8:22 ` [PATCH 09/18] Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking" Alex Shi
2012-12-10 8:22 ` [PATCH 10/18] sched: add sched_policy in kernel Alex Shi
2012-12-10 8:22 ` [PATCH 11/18] sched: add sched_policy and it's sysfs interface Alex Shi
2012-12-10 8:22 ` [PATCH 12/18] sched: log the cpu utilization at rq Alex Shi
2012-12-10 8:22 ` [PATCH 13/18] sched: add power aware scheduling in fork/exec/wake Alex Shi
2012-12-10 8:22 ` [PATCH 14/18] sched: add power/performance balance allowed flag Alex Shi
2012-12-10 8:22 ` [PATCH 15/18] sched: don't care if the local group has capacity Alex Shi
2012-12-10 8:22 ` [PATCH 16/18] sched: pull all tasks from source group Alex Shi
2012-12-10 8:22 ` [PATCH 17/18] sched: power aware load balance, Alex Shi
2012-12-10 8:22 ` [PATCH 18/18] sched: lazy powersaving balance Alex Shi
2012-12-11 0:51 ` [PATCH 0/18] sched: simplified fork, enable load average into LB and power awareness scheduling Alex Shi
2012-12-11 12:10 ` Alex Shi
2012-12-11 15:48 ` Borislav Petkov
2012-12-11 16:03 ` Arjan van de Ven [this message]
2012-12-11 16:13 ` Borislav Petkov
2012-12-11 16:40 ` Arjan van de Ven
2012-12-12 9:52 ` Amit Kucheria
2012-12-12 13:55 ` Alex Shi
2012-12-12 14:21 ` Vincent Guittot
2012-12-13 2:51 ` Alex Shi
2012-12-12 14:41 ` Borislav Petkov
2012-12-13 3:07 ` Alex Shi
2012-12-13 11:35 ` Borislav Petkov
2012-12-14 1:56 ` Alex Shi
2012-12-12 1:14 ` Alex Shi
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