From: Alex Shi <alex.shi@intel.com>
To: Alex Shi <lkml.alex@gmail.com>
Cc: 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>,
Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: [PATCH 0/18] sched: simplified fork, enable load average into LB and power awareness scheduling
Date: Tue, 11 Dec 2012 20:10:20 +0800 [thread overview]
Message-ID: <50C722AC.3080806@intel.com> (raw)
In-Reply-To: <CAGjg+kGAokK0oOAOJL=apkcyi_deqtHHsaJCViCz9tOMKG56bw@mail.gmail.com>
On 12/11/2012 08:51 AM, Alex Shi wrote:
> On Mon, Dec 10, 2012 at 4:22 PM, Alex Shi <alex.shi@intel.com> wrote:
>> This patchset base on tip/sched/core tree temporary, since it is more
>> steady than tip/master. and it's easy to rebase on tip/master.
>>
>> It includes 3 parts changes.
>>
>> 1, simplified fork, patch 1~4, that simplified the fork/exec/wake log in
>> find_idlest_group and select_task_rq_fair. it can increase 10+%
>> hackbench process and thread performance on our 4 sockets SNB EP machine.
>>
>> 2, enable load average into LB, patch 5~9, that using load average in
>> load balancing, with a runnable load value industrialization bug fix and
>> new fork task load contrib enhancement.
>>
>> 3, power awareness scheduling, patch 10~18,
>> Defined 2 new power aware policy balance and
>> powersaving, and then try to spread or shrink tasks on CPU unit
>> according the different scheduler policy. That can save much power when
>> task number in system is no more then cpu number.
>
> tried with sysbench fileio test rndrw mode, with half thread of LCPU number,
> performance is similar, power can save about 5~10 Watts on 2 sockets SNB EP
> and NHM EP boxes.
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
On a 2 sockets SNB EP box.
powersaving balance performance
x = 4 190.995 /149 35 200.6 /129 38 208.561 /135 35
x = 8 197.969 /108 46 208.885 /103 46 213.96 /108 43
x = 16 205.163 /76 64 212.144 /91 51 229.287 /97 44
data format is: 166.516 /88 68
166.516: avagerage Watts
88: seconds(compress time)
68: scaled performance/power = 1000000 / time / power
next prev parent reply other threads:[~2012-12-11 12:10 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-10 8:22 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 [this message]
2012-12-11 15:48 ` Borislav Petkov
2012-12-11 16:03 ` Arjan van de Ven
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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