linux-kernel - Re: [RFC] Introduce greedy hrtimer walk on idle

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Message-ID: <CABeCy1aFW7z+-s2m-Fx6Fhcj7Dpa3Mm5hEh7fPiD3_CxFdQbPA@mail.gmail.com>
Date:	Tue, 1 Nov 2011 16:55:50 -0700
From:	Venki Pallipadi <venki@...gle.com>
To:	alex shi <lkml.alex@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	linux-kernel@...r.kernel.org, "Chen, Tim C" <tim.c.chen@...el.com>
Subject: Re: [RFC] Introduce greedy hrtimer walk on idle

On Mon, Oct 31, 2011 at 7:11 PM, alex shi <lkml.alex@...il.com> wrote:
>> Hi Alex,
>>
>> It should apply cleanly over 3.0. Thanks for testing the patch..
>
> I tested the patch against 3.1 kernel for specpower benchmark on our
> machine, westmere core laptop Thinkpad t410(internal name lkp-t410),
> and on Romely-EP machine(lkp-sb03). No clear power or performance
> change found. the performance and power has no clear change for every
> level system load. from 0 to 100%.

Thanks Alex for testing this. Likely that with specpower there are not
many active timers. Was the run with run level 5 and with all the system daemons
that come with distro active?

Thanks,
Venki
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