linux-kernel - Re: [PATCH] PM / suspend: Count suspend-to-idle loop as sleep time

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Message-ID: <20180914080422.GG24124@hirez.programming.kicks-ass.net>
Date:   Fri, 14 Sep 2018 10:04:22 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: Re: [PATCH] PM / suspend: Count suspend-to-idle loop as sleep time

On Fri, Sep 14, 2018 at 09:47:28AM +0200, Rafael J. Wysocki wrote:
> On Fri, Sep 14, 2018 at 9:41 AM Peter Zijlstra <peterz@...radead.org> wrote:
> > Do we want a 'warning' of sorts when the delta becomes significant (for
> > whatever that is) ? That might be an indication that there are frequent
> > wakeups which we might not be expecting. Of keep the number of spurious
> > wakeups in a stat counter somewhere -- something to look at if the
> > battery drains faster than expected.
> 
> If you echo 1 to /sys/power/pm_debug_messages, dmesg will tell you
> that (with gory details). :-)

Shiny, didn't know that ;-)