linux-kernel - Re: [RFC PATCH] ASoC: core: Optimise suspend/resume of DAPM widgets

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Message-ID: <20180816105135.GZ2414@sirena.org.uk>
Date:   Thu, 16 Aug 2018 11:51:35 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: Re: [RFC PATCH] ASoC: core: Optimise suspend/resume of DAPM widgets

On Wed, Aug 15, 2018 at 07:48:47PM +0100, Jon Hunter wrote:

> So then I made the following change to avoid scheduling the function
> calls unnecessarily (which I think should be fine) ...

> Please note that I am just using ktime_get() to log the time on entry
> and exit from dapm_power_widgets() and so yes the time may not be
> purely the time take to execute this function if we are preempted,
> but I am measuring in the same way in both cases and so it does seem
> to show some improvement.

That seems like a simple and useful optimization, will you send a patch?

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