From: Alex Shi <alex.shi@linaro.org>
To: Daniel Lezcano <daniel.lezcano@linaro.org>,
"Rafael J. Wysocki" <rafael@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Linux PM <linux-pm@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Arjan van de Ven <arjan@linux.intel.com>,
Rik van Riel <riel@redhat.com>
Subject: Re: [PATCH 3/3] cpuidle/menu: add per cpu pm_qos_resume_latency consideration
Date: Sun, 22 Jan 2017 09:31:44 +0800 [thread overview]
Message-ID: <58840B80.7000808@linaro.org> (raw)
In-Reply-To: <20170120105428.GA1804@mai>
> Yeah, that could be problematic. The code snippet gives the general idea but it
> could be changed by for example by a flag telling the cpus when they enter idle
> to update their state_count. Or something like that.
Yes, this idea could be helpful.
But since the idle path isn't a hot path. and a few memory access won't
cost a lot. So I doubt if the benefit could be measurable.
>
> But if you think the patchset is fine, it is ok, we can improve things afterwards.
>
next prev parent reply other threads:[~2017-01-22 1:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-12 13:27 [PATCH v2 0/3] per cpu resume latency Alex Shi
2017-01-12 13:27 ` [PATCH 1/3] cpuidle/menu: stop seeking deeper idle if current state is too deep Alex Shi
2017-01-12 13:27 ` [PATCH v2 2/3] cpu: expose pm_qos_resume_latency for each cpu Alex Shi
2017-01-17 10:23 ` Daniel Lezcano
2017-01-19 8:18 ` Alex Shi
2017-01-12 13:27 ` [PATCH 3/3] cpuidle/menu: add per cpu pm_qos_resume_latency consideration Alex Shi
2017-01-12 20:03 ` Rik van Riel
2017-01-16 1:11 ` Alex Shi
2017-01-17 9:38 ` Daniel Lezcano
2017-01-19 9:25 ` Alex Shi
2017-01-19 10:21 ` Daniel Lezcano
2017-01-19 21:43 ` Rafael J. Wysocki
2017-01-20 8:35 ` Alex Shi
2017-01-20 10:54 ` Daniel Lezcano
2017-01-22 1:31 ` Alex Shi [this message]
2017-01-23 12:50 ` Daniel Lezcano
2017-01-23 14:58 ` Alex Shi
[not found] <1483630187-29622-1-git-send-email-alex.shi@linaro.org>
2017-01-05 15:29 ` Alex Shi
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