From: Tim Chen <tim.c.chen@linux.intel.com>
To: Abel Wu <wuyun.abel@bytedance.com>,
Peter Zijlstra <peterz@infradead.org>,
Mel Gorman <mgorman@suse.de>,
Vincent Guittot <vincent.guittot@linaro.org>
Cc: Josh Don <joshdon@google.com>, Chen Yu <yu.c.chen@intel.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
"Gautham R . Shenoy" <gautham.shenoy@amd.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 1/5] sched/fair: Ignore SIS_UTIL when has idle core
Date: Wed, 14 Sep 2022 14:58:44 -0700 [thread overview]
Message-ID: <dd0faa6599c4503b2cdcb96234ec6b4f49a9a512.camel@linux.intel.com> (raw)
In-Reply-To: <20220909055304.25171-2-wuyun.abel@bytedance.com>
On Fri, 2022-09-09 at 13:53 +0800, Abel Wu wrote:
> When SIS_UTIL is enabled, SIS domain scan will be skipped if the
> LLC is overloaded even the has_idle_core hint is true. Since idle
> load balancing is triggered at tick boundary, the idle cores can
> stay cold for the whole tick period wasting time meanwhile some
> of other cpus might be overloaded.
>
> Give it a chance to scan for idle cores if the hint implies a
> worthy effort.
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
>
next prev parent reply other threads:[~2022-09-14 21:58 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-09 5:52 [PATCH v5 0/5] sched/fair: Improve scan efficiency of SIS Abel Wu
2022-09-09 5:53 ` [PATCH v5 1/5] sched/fair: Ignore SIS_UTIL when has idle core Abel Wu
2022-09-14 21:58 ` Tim Chen [this message]
2022-09-09 5:53 ` [PATCH v5 2/5] sched/fair: Limited scan for idle cores when overloaded Abel Wu
2022-09-09 9:29 ` Chen Yu
2022-09-09 10:11 ` Abel Wu
2022-09-14 22:25 ` Tim Chen
2022-09-15 3:08 ` Abel Wu
2022-09-09 5:53 ` [PATCH v5 3/5] sched/fair: Skip core update if task pending Abel Wu
2022-09-09 10:09 ` Chen Yu
2022-09-09 10:13 ` Abel Wu
2022-09-14 22:37 ` Tim Chen
2022-09-09 5:53 ` [PATCH v5 4/5] sched/fair: Skip SIS domain scan if fully busy Abel Wu
2022-09-14 6:21 ` Yicong Yang
2022-09-14 7:43 ` Abel Wu
2022-09-15 0:22 ` Tim Chen
2022-09-15 3:11 ` Abel Wu
2022-09-09 5:53 ` [PATCH v5 5/5] sched/fair: Introduce SIS_FILTER Abel Wu
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=dd0faa6599c4503b2cdcb96234ec6b4f49a9a512.camel@linux.intel.com \
--to=tim.c.chen@linux.intel.com \
--cc=gautham.shenoy@amd.com \
--cc=joshdon@google.com \
--cc=kprateek.nayak@amd.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mgorman@suse.de \
--cc=peterz@infradead.org \
--cc=vincent.guittot@linaro.org \
--cc=wuyun.abel@bytedance.com \
--cc=yu.c.chen@intel.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox