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From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Tue, 27 Jun 2017 09:47:45 +0300
Message-ID: <CAHp75VeYkh4hHtLbjWwVZjT=wGp0wrq_k6XiLuFF62L2MiRVxg@mail.gmail.com>
Subject: Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on
 recent systems
To: Tom Lanyon <tom@oneshoeco.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Linux ACPI <linux-acpi@vger.kernel.org>,
        Linux PM <linux-pm@vger.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Darren Hart <dvhart@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
        Mika Westerberg <mika.westerberg@linux.intel.com>,
        Mario Limonciello <mario.limonciello@dell.com>,
        =?UTF-8?B?SsOpcsO0bWUgZGUgQnJldGFnbmU=?= 
        <jerome.debretagne@gmail.com>,
        "Zheng, Lv" <lv.zheng@intel.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
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On Tue, Jun 27, 2017 at 8:50 AM, Tom Lanyon <tom@oneshoeco.com> wrote:
> On 23 June 2017 at 12:40, Linus Torvalds <torvalds@linux-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