From: Abel Wu <wuyun.abel@bytedance.com>
To: Chen Yu <yu.c.chen@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Mel Gorman <mgorman@suse.de>,
Vincent Guittot <vincent.guittot@linaro.org>,
Josh Don <joshdon@google.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
"Gautham R . Shenoy" <gautham.shenoy@amd.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 6/7] sched/fair: skip busy cores in SIS search
Date: Wed, 22 Jun 2022 12:03:38 +0800 [thread overview]
Message-ID: <3790fb8b-db91-b528-c574-b188c5d8d2fd@bytedance.com> (raw)
In-Reply-To: <20220621181442.GA37168@chenyu5-mobl1>
On 6/22/22 2:14 AM, Chen Yu Wrote:
> Hi Abel,
> On Sun, Jun 19, 2022 at 08:04:50PM +0800, Abel Wu wrote:
>> Try to improve efficiency of SIS domain search by filtering out busy
>> cores, and as a result the more overloaded the system is, the less
>> cpus will be scanned.
>>
>> The filter is supposed to contain unoccupied cpus of the LLC. And we
>> propagate these cpus to the filter one at a time at core granule.
>> This can help spreading load to different cores given that the search
>> depth is limited. The chosen cpu to be propagated is guaranteed to be
>> unoccupied at that time.
>>
>> When idle cpu exists, the last one is preferred in order not to
>> conflict with periodic load balancing during which the first idle
>> cpu (if any) is chosen to be fed with tasks.
>>
> Maybe the content in cover letter could be copied into this git log for
> future reference?
Definitely. Will fix this in next version.
Thanks.
next prev parent reply other threads:[~2022-06-22 4:04 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-19 12:04 [PATCH v4 0/7] sched/fair: improve scan efficiency of SIS Abel Wu
2022-06-19 12:04 ` [PATCH v4 1/7] sched/fair: default to false in test_idle_cores Abel Wu
2022-06-27 22:53 ` Josh Don
2022-06-28 3:39 ` Abel Wu
2022-06-19 12:04 ` [PATCH v4 2/7] sched/fair: remove redundant check in select_idle_smt Abel Wu
2022-06-27 23:17 ` Josh Don
2022-06-19 12:04 ` [PATCH v4 3/7] sched/fair: avoid double search on same cpu Abel Wu
2022-06-27 23:24 ` Josh Don
2022-06-19 12:04 ` [PATCH v4 4/7] sched/fair: remove useless check in select_idle_core Abel Wu
2022-06-27 23:42 ` Josh Don
2022-06-28 3:51 ` Abel Wu
2022-06-29 0:41 ` Josh Don
2022-06-19 12:04 ` [PATCH v4 5/7] sched/fair: skip SIS domain search if fully busy Abel Wu
2022-06-28 0:28 ` Josh Don
2022-06-28 6:53 ` Abel Wu
2022-06-29 1:11 ` Josh Don
2022-06-29 7:05 ` Abel Wu
2022-07-20 15:34 ` Gautham R. Shenoy
2022-08-15 9:49 ` Abel Wu
2022-06-19 12:04 ` [PATCH v4 6/7] sched/fair: skip busy cores in SIS search Abel Wu
2022-06-21 18:14 ` Chen Yu
2022-06-22 3:52 ` [External] " Abel Wu
2022-06-24 3:30 ` Chen Yu
2022-06-27 10:13 ` Abel Wu
2022-06-28 7:58 ` Abel Wu
2022-06-30 4:16 ` Chen Yu
2022-06-30 10:46 ` Abel Wu
2022-07-09 8:55 ` Chen Yu
2022-07-09 15:56 ` Abel Wu
2022-07-11 12:02 ` Chen Yu
2022-07-13 10:25 ` Abel Wu
2022-06-22 4:03 ` Abel Wu [this message]
2022-07-20 16:16 ` Gautham R. Shenoy
2022-08-15 9:49 ` Abel Wu
2022-06-19 12:04 ` [PATCH v4 7/7] sched/fair: de-entropy for SIS filter Abel Wu
2022-06-21 18:23 ` Chen Yu
2022-06-22 4:01 ` Abel Wu
2022-06-30 7:46 ` Abel Wu
2022-07-09 14:42 ` [sched/fair] 32fe13cd7a: phoronix-test-suite.fio.SequentialWrite.IO_uring.Yes.No.4KB.DefaultTestDirectory.mb_s -11.7% regression kernel test robot
2022-07-09 16:14 ` Abel Wu
2022-07-20 17:08 ` [PATCH v4 7/7] sched/fair: de-entropy for SIS filter Gautham R. Shenoy
2022-08-15 9:49 ` Abel Wu
2022-07-06 9:51 ` [PATCH v4 0/7] sched/fair: improve scan efficiency of SIS Abel Wu
2022-07-18 11:00 ` K Prateek Nayak
2022-08-15 13:59 ` Abel Wu
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