Message-ID: <51F640AB.2050709@arm.com>
Date: Mon, 29 Jul 2013 11:15:07 +0100
From: Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@arm.com>
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To: Vincent Guittot <vincent.guittot@linaro.org>
CC: Hanjun Guo <hanjun.guo@linaro.org>,
        "linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>,
        Graeme Gregory <graeme.gregory@linaro.org>,
        Al Stone <al.stone@linaro.org>, Patch Tracking <patches@linaro.org>,
        Catalin Marinas <Catalin.Marinas@arm.com>,
        linaro-acpi <linaro-acpi@lists.linaro.org>,
        Will Deacon <Will.Deacon@arm.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Tomasz Nowicki <tomasz.nowicki@linaro.org>,
        Naresh Bhat <naresh.bhat@linaro.org>,
        Russell King <rmk+kernel@arm.linux.org.uk>,
        LAK <linux-arm-kernel@lists.infradead.org>,
        Sudeep.KarkadaNagesha@arm.com
Subject: Re: [RFC][PATCH 1/2] ARM64: add cpu topology definition
References: <1374921728-9007-1-git-send-email-hanjun.guo@linaro.org> <CAKfTPtBpo41LJ3V8TB8YwudwqpURuA2u_Lvu4KYVK=qSs+gFuQ@mail.gmail.com>
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On 29/07/13 10:46, Vincent Guittot wrote:
> On 27 July 2013 12:42, Hanjun Guo <hanjun.guo@linaro.org> wrote:
>> Power aware scheduling needs the cpu topology information to improve the
>> cpu scheduler decision making.
> 
> It's not only power aware scheduling. The scheduler already uses
> topology and cache sharing when  CONFIG_SCHED_MC and/or
> CONFIG_SCHED_SMT are enable. So you should also add these configs for
> arm64 so the scheduler can use it
> 
Just for my knowledge, I thought power aware using SCHED_MC/SMT was
removed. I see commit 8e7fbcbc22c12414bcc9dfdd683637f58fb32759 "sched:
Remove stale power aware scheduling remnants and dysfunctional knobs"
I may be missing something here.

Regards,
Sudeep

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