From: Peter Zijlstra <peterz@infradead.org>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: Ingo Molnar <mingo@kernel.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Valentin Schneider <valentin.schneider@arm.com>,
Song Bao Hua <song.bao.hua@hisilicon.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] Reduce SIS scanning
Date: Wed, 4 Aug 2021 15:11:29 +0200 [thread overview]
Message-ID: <20210804131129.GF8057@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20210804115857.6253-1-mgorman@techsingularity.net>
On Wed, Aug 04, 2021 at 12:58:55PM +0100, Mel Gorman wrote:
> This is the first two patches from "Modify and/or delete SIS_PROP" and
> focues on improving the hit rate for recent_used_cpu and avoids rescanning
> the target CPU when it's known to be busy. These are relatively simply
> patches in comparison to the full series which could be a regression
> magnet and that series had at least one mistake in it.
>
> In general, the usual suspects showed mostly small gains with a few
> exceptions. Usual suspects were NAS, hackbench, schbench (Facebook
> latency-sensitive workload), perf pipe, kernel building, git test suite,
> dbench and redis.
>
> From here, the next obvious candidates are either improving has_idle_cores
> or continuing to try remove/improve SIS_PROP.
Thanks!
prev parent reply other threads:[~2021-08-04 13:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-04 11:58 [PATCH 0/2] Reduce SIS scanning Mel Gorman
2021-08-04 11:58 ` [PATCH 1/2] sched/fair: Use prev instead of new target as recent_used_cpu Mel Gorman
2021-08-05 9:34 ` [tip: sched/core] " tip-bot2 for Mel Gorman
2021-08-04 11:58 ` [PATCH 2/2] sched/fair: Avoid a second scan of target in select_idle_cpu Mel Gorman
2021-08-05 9:34 ` [tip: sched/core] " tip-bot2 for Mel Gorman
2021-08-04 13:11 ` Peter Zijlstra [this message]
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=20210804131129.GF8057@worktop.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mgorman@techsingularity.net \
--cc=mingo@kernel.org \
--cc=song.bao.hua@hisilicon.com \
--cc=valentin.schneider@arm.com \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox