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

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Message-ID: <CABeCy1Zn0GbAzFBYk1mkDvfEwr4L8DZ-ZhweXaUwWN=3sJnmSQ@mail.gmail.com>
Date:	Fri, 23 Sep 2011 16:41:41 -0700
From:	Venki Pallipadi <venki@...gle.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, 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
Subject: Re: [RFC] Introduce greedy hrtimer walk on idle

On Fri, Sep 23, 2011 at 12:55 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Fri, 2011-09-23 at 11:54 -0700, Venkatesh Pallipadi wrote:
>> Comments?
>
> One of the reasons we didn't do it before was added cost to
> hrtimer_{add,del}, did you measure workloads that are heavy on  that?
>

I haven't seen any measurable overhead with workloads I have tried.
But, I don't think I have hit that path hard enough. Do you have any
particular workload in mind?
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