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 [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 [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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=50C722AC.3080806@intel.com \
--to=alex.shi@intel.com \
--cc=akpm@linux-foundation.org \
--cc=andre.przywara@amd.com \
--cc=arjan@linux.intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lkml.alex@gmail.com \
--cc=mingo@redhat.com \
--cc=paul.gortmaker@windriver.com \
--cc=paulmck@linux.vnet.ibm.com \
--cc=peterz@infradead.org \
--cc=pjt@google.com \
--cc=preeti@linux.vnet.ibm.com \
--cc=rjw@sisk.pl \
--cc=rob@landley.net \
--cc=vincent.guittot@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.