linux-kernel - Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on recent systems

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Date:   Tue, 27 Jun 2017 09:47:45 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Tom Lanyon <tom@...shoeco.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Darren Hart <dvhart@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Mario Limonciello <mario.limonciello@...l.com>,
        Jérôme de Bretagne 
        <jerome.debretagne@...il.com>, "Zheng, Lv" <lv.zheng@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on
 recent systems

On Tue, Jun 27, 2017 at 8:50 AM, Tom Lanyon <tom@...shoeco.com> wrote:
> On 23 June 2017 at 12:40, Linus Torvalds <torvalds@...ux-foundation.org> wrote:

>     Linux during s2idle => 6% battery drain per hour.
>     Win10 during sleep => 1% battery drain per hour.
>
> where Linux = 4.12-rc6 + the latest patch from your acpi-pm-test branch.
>
> So whilst s2idle halves the battery drain compared to the machine
> staying powered on, it's still significantly more draining than Win10.
> Let me know if there's any more useful analysis I can do.

Tom, thanks for this.
I would speculate that the problem might be in the certain device
drivers. It would be nice to get statistics which wakeup source
generates more hits.


-- 
With Best Regards,
Andy Shevchenko