From: Michael Wang <wangyun@linux.vnet.ibm.com>
To: Alex Shi <alex.shi@intel.com>
Cc: mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de,
akpm@linux-foundation.org, arjan@linux.intel.com, bp@alien8.de,
pjt@google.com, namhyung@kernel.org, efault@gmx.de,
morten.rasmussen@arm.com, vincent.guittot@linaro.org,
gregkh@linuxfoundation.org, preeti@linux.vnet.ibm.com,
viresh.kumar@linaro.org, linux-kernel@vger.kernel.org,
len.brown@intel.com, rafael.j.wysocki@intel.com, jkosina@suse.cz,
clark.williams@gmail.com, tony.luck@intel.com,
keescook@chromium.org, mgorman@suse.de, riel@redhat.com
Subject: Re: [patch v3 0/8] sched: use runnable avg in load balance
Date: Wed, 03 Apr 2013 10:46:23 +0800 [thread overview]
Message-ID: <515B97FF.2040409@linux.vnet.ibm.com> (raw)
In-Reply-To: <515A9859.6000606@intel.com>
On 04/02/2013 04:35 PM, Alex Shi wrote:
[snip]
>>
>> The reason may caused by wake_affine()'s higher overhead, and pgbench is
>> really sensitive to this stuff...
>
> Thanks for testing. Could you like to remove the last patch and test it
> again? I want to know if the last patch has effect on pgbench.
Done, here the results of pgbench without the last patch on my box:
| db_size | clients | tps | | tps |
+---------+---------+-------+ +-------+
| 22 MB | 1 | 10662 | | 10679 |
| 22 MB | 2 | 21483 | | 21471 |
| 22 MB | 4 | 42046 | | 41957 |
| 22 MB | 8 | 55807 | | 55684 |
| 22 MB | 12 | 50768 | | 52074 |
| 22 MB | 16 | 49880 | | 52879 |
| 22 MB | 24 | 45904 | | 53406 |
| 22 MB | 32 | 43420 | | 54088 | +24.57%
| 7484 MB | 1 | 7965 | | 7725 |
| 7484 MB | 2 | 19354 | | 19405 |
| 7484 MB | 4 | 37552 | | 37246 |
| 7484 MB | 8 | 48655 | | 50613 |
| 7484 MB | 12 | 45778 | | 47639 |
| 7484 MB | 16 | 45659 | | 48707 |
| 7484 MB | 24 | 42192 | | 46469 |
| 7484 MB | 32 | 36385 | | 46346 | +27.38%
| 15 GB | 1 | 7677 | | 7727 |
| 15 GB | 2 | 19227 | | 19199 |
| 15 GB | 4 | 37335 | | 37372 |
| 15 GB | 8 | 48130 | | 50333 |
| 15 GB | 12 | 45393 | | 47590 |
| 15 GB | 16 | 45110 | | 48091 |
| 15 GB | 24 | 41415 | | 47415 |
| 15 GB | 32 | 35988 | | 45749 | +27.12%
Very nice improvement, I'd like to test it with the wake-affine throttle
patch later, let's see what will happen ;-)
Any idea on why the last one caused the regression?
Regards,
Michael Wang
>
next prev parent reply other threads:[~2013-04-03 2:46 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-02 3:23 [patch v3 0/8] sched: use runnable avg in load balance Alex Shi
2013-04-02 3:23 ` [patch v3 1/8] Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking" Alex Shi
2013-04-02 3:23 ` [patch v3 2/8] sched: set initial value of runnable avg for new forked task Alex Shi
2013-04-02 3:23 ` [patch v3 3/8] sched: only count runnable avg on cfs_rq's nr_running Alex Shi
2013-04-03 3:19 ` Alex Shi
2013-04-02 3:23 ` [patch v3 4/8] sched: update cpu load after task_tick Alex Shi
2013-04-02 3:23 ` [patch v3 5/8] sched: compute runnable load avg in cpu_load and cpu_avg_load_per_task Alex Shi
2013-04-02 3:23 ` [patch v3 6/8] sched: consider runnable load average in move_tasks Alex Shi
2013-04-09 7:08 ` Vincent Guittot
2013-04-09 8:05 ` Alex Shi
2013-04-09 8:58 ` Vincent Guittot
2013-04-09 10:38 ` Alex Shi
2013-04-09 11:56 ` Vincent Guittot
2013-04-09 14:48 ` Alex Shi
2013-04-09 15:16 ` Vincent Guittot
2013-04-10 2:31 ` Alex Shi
2013-04-10 6:07 ` Michael Wang
2013-04-10 6:55 ` Vincent Guittot
2013-04-02 3:23 ` [patch v3 7/8] sched: consider runnable load average in effective_load Alex Shi
2013-04-02 3:23 ` [patch v3 8/8] sched: use instant load for burst wake up Alex Shi
2013-04-02 7:23 ` [patch v3 0/8] sched: use runnable avg in load balance Michael Wang
2013-04-02 8:34 ` Mike Galbraith
2013-04-02 9:13 ` Michael Wang
2013-04-02 8:35 ` Alex Shi
2013-04-02 9:45 ` Michael Wang
2013-04-03 2:46 ` Michael Wang [this message]
2013-04-03 2:56 ` Alex Shi
2013-04-03 3:23 ` Michael Wang
2013-04-03 4:28 ` Alex Shi
2013-04-03 5:38 ` Michael Wang
2013-04-03 5:53 ` Michael Wang
2013-04-03 6:01 ` Alex Shi
2013-04-03 6:22 ` Michael Wang
2013-04-03 6:53 ` Alex Shi
2013-04-03 7:18 ` Michael Wang
2013-04-03 7:28 ` Alex Shi
2013-04-03 8:46 ` Alex Shi
2013-04-03 9:37 ` Michael Wang
2013-04-03 11:17 ` Alex Shi
2013-04-07 3:09 ` Michael Wang
2013-04-07 7:30 ` Alex Shi
2013-04-07 8:56 ` Michael Wang
2013-04-09 5:08 ` Alex Shi
2013-04-10 13:12 ` Alex Shi
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