From: Kevin Hilman <khilman@kernel.org>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
linux-pm@vger.kernel.org, Len Brown <len.brown@intel.com>,
Pavel Machek <pavel@ucw.cz>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Lina Iyer <lina.iyer@linaro.org>,
Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Subject: Re: [PATCH 2/2] PM / Domains: Merge measurements for PM QoS device latencies
Date: Fri, 23 Oct 2015 11:49:08 -0700 [thread overview]
Message-ID: <7h8u6tpgij.fsf@deeprootsystems.com> (raw)
In-Reply-To: <1444921339-22614-1-git-send-email-ulf.hansson@linaro.org> (Ulf Hansson's message of "Thu, 15 Oct 2015 17:02:19 +0200")
Ulf Hansson <ulf.hansson@linaro.org> writes:
> Measure latency does by itself contribute to an increased latency, thus we
> should avoid it when it isn't needed.
>
> By merging the latency measurements for the ->save_state() and the
> ->stop() callbacks, we get one measurement instead of two and we get one
> value to store instead of two. Let's also apply the likewise change for
> the ->start() and ->restore_state() callbacks.
>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
prev parent reply other threads:[~2015-10-23 18:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-15 15:02 [PATCH 2/2] PM / Domains: Merge measurements for PM QoS device latencies Ulf Hansson
2015-10-15 21:18 ` Lina Iyer
2015-10-21 10:33 ` Pavel Machek
2015-10-22 13:52 ` Ulf Hansson
2015-10-23 18:49 ` Kevin Hilman [this message]
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