linux-kernel - Re: [PATCH v7 13/19] PM / devfreq: tegra30: Increase sampling period to 16ms

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Message-ID: <20191101215332.GA8724@qmqm.qmqm.pl>
Date:   Fri, 1 Nov 2019 22:53:32 +0100
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Peter Geis <pgwipeout@...il.com>, linux-pm@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 13/19] PM / devfreq: tegra30: Increase sampling period
 to 16ms

On Wed, Oct 30, 2019 at 01:00:13AM +0300, Dmitry Osipenko wrote:
> Increase sampling period by 4ms to get a nicer pow2 value, converting
> diving into shifts in the code. That's more preferable for Tegra30 that
> doesn't have hardware divider instructions because of older Cortex-A9 CPU.
> In a result boosting events are delayed by 4ms, which is not sensible in
> practice at all.

This is made irrelevant by patch 17.

Best Regards,
Michał Mirosław