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Date: Tue, 15 May 2012 17:05:47 +0200
Message-ID: <CAKfTPtDrZ-tfC81jnxwpB+DCtmxhU+VfoYbtSBr8MkFt+P8JcA@mail.gmail.com>
Subject: Re: Plumbers: Tweaking scheduler policy micro-conf RFP
From: Vincent Guittot <vincent.guittot@linaro.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: paulmck@linux.vnet.ibm.com, smuckle@quicinc.com, khilman@ti.com,
        Robin.Randhawa@arm.com, suresh.b.siddha@intel.com,
        thebigcorporation@gmail.com, venki@google.com,
        panto@antoniou-consulting.com, mingo@elte.hu, paul.brett@intel.com,
        pdeschrijver@nvidia.com, pjt@google.com, efault@gmx.de,
        fweisbec@gmail.com, geoff@infradead.org, rostedt@goodmis.org,
        tglx@linutronix.de, amit.kucheria@linaro.org,
        linux-kernel <linux-kernel@vger.kernel.org>,
        linaro-sched-sig@lists.linaro.org,
        Morten Rasmussen <Morten.Rasmussen@arm.com>,
        Juri Lelli <juri.lelli@gmail.com>
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On 15 May 2012 15:00, Peter Zijlstra <peterz@infradead.org> wrote:
> On Tue, 2012-05-15 at 14:57 +0200, Vincent Guittot wrote:
>>
>> Not sure that nobody cares but it's much more that scheduler,
>> load_balance and sched_mc are sensible enough that it's difficult to
>> ensure that a modification will not break everything for someone
>> else.
>
> Thing is, its already broken, there's nothing else to break :-)
>

sched_mc is the only power-aware knob in the current scheduler. It's
far from being perfect but it seems to work on some ARM platform at
least. You mentioned at the scheduler mini-summit that we need a
cleaner replacement and everybody has agreed on that point. Is anybody
working on it yet ? and can we discuss at Plumber's what this
replacement would look like ?