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Message-ID: <20170525143901.GC23493@htj.duckdns.org>
Date: Thu, 25 May 2017 10:39:01 -0400
From: Tejun Heo <tj@...nel.org>
To: Tim Chen <tim.c.chen@...ux.intel.com>
Cc: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
linux-kernel@...r.kernel.org,
Linus Torvalds <torvalds@...ux-foundation.org>,
Vincent Guittot <vincent.guittot@...aro.org>,
Mike Galbraith <efault@....de>, Paul Turner <pjt@...gle.com>,
Chris Mason <clm@...com>, kernel-team@...com,
mohini.narkhede@...el.com
Subject: Re: [PATCH v2 for-4.12-fixes 1/2] sched/fair: Use task_groups
instead of leaf_cfs_rq_list to walk all cfs_rqs
On Wed, May 24, 2017 at 04:40:34PM -0700, Tim Chen wrote:
> We did some preliminary testing of this patchset for a well
> known database benchmark on a 4 socket Skylake server system.
> It provides a 3.7% throughput boost which is significant for
> this benchmark.
That's great to hear. Yeah, the walk can be noticeably expensive even
with moderate number of cgroups. Thanks for sharing the result.
--
tejun
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