From: Peter Zijlstra <peterz@infradead.org>
To: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Chris Redpath <chris.redpath@arm.com>
Subject: Re: [PATCH] sched: fix sched_feat for !SCHED_DEBUG builds
Date: Tue, 7 Nov 2017 20:05:05 +0100 [thread overview]
Message-ID: <20171107190505.GP3165@worktop.lehotels.local> (raw)
In-Reply-To: <20171107160658.4839-1-patrick.bellasi@arm.com>
On Tue, Nov 07, 2017 at 04:06:58PM +0000, Patrick Bellasi wrote:
> For this mechanism to properly work it's required for the compiler to
> have full access, from each translation unit, to whatever is the value
> defined by the sched_feat macro.
> Statistics on the reported completion time:
>
> count mean std min 99% max
> v4.14-rc8 30.0 15.7831 0.176032 15.442 16.01226 16.014
> v4.14-rc8+patch 30.0 15.5033 0.189681 15.232 15.93938 15.962
>
> show a 1.8% speedup on average completion time and 0.5% speedup in the
> 99 percentile.
>
Ack
next prev parent reply other threads:[~2017-11-07 19:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-07 16:06 [PATCH] sched: fix sched_feat for !SCHED_DEBUG builds Patrick Bellasi
2017-11-07 19:05 ` Peter Zijlstra [this message]
2017-11-08 9:46 ` [tip:sched/core] sched/core: Optimize sched_feat() " tip-bot for Patrick Bellasi
2017-11-08 10:03 ` Ingo Molnar
2017-11-08 11:02 ` Patrick Bellasi
2017-11-08 11:24 ` Patrick Bellasi
2017-11-08 13:05 ` Ingo Molnar
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