lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20210804115857.6253-1-mgorman@techsingularity.net>
Date:   Wed,  4 Aug 2021 12:58:55 +0100
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Valentin Schneider <valentin.schneider@....com>,
        Song Bao Hua <song.bao.hua@...ilicon.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Mel Gorman <mgorman@...hsingularity.net>
Subject: [PATCH 0/2] Reduce SIS scanning

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.

 kernel/sched/fair.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

-- 
2.31.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ