Message-ID: <51CD6F91.3010301@intel.com>
Date: Fri, 28 Jun 2013 19:12:17 +0800
From: Alex Shi <alex.shi@intel.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120912 Thunderbird/15.0.1
MIME-Version: 1.0
To: Peter Zijlstra <peterz@infradead.org>
CC: Paul Turner <pjt@google.com>, Ingo Molnar <mingo@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Arjan van de Ven <arjan@linux.intel.com>,
        Borislav Petkov <bp@alien8.de>, Namhyung Kim <namhyung@kernel.org>,
        Mike Galbraith <efault@gmx.de>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        gregkh@linuxfoundation.org,
        Preeti U Murthy <preeti@linux.vnet.ibm.com>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        LKML <linux-kernel@vger.kernel.org>, Len Brown <len.brown@intel.com>,
        rafael.j.wysocki@intel.com, jkosina@suse.cz,
        Clark Williams <clark.williams@gmail.com>,
        "tony.luck@intel.com" <tony.luck@intel.com>, keescook@chromium.org,
        Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
        fweisbec@gmail.com
Subject: Re: [Resend patch v8 0/13] use runnable load in schedule balance
References: <1371694737-29336-1-git-send-email-alex.shi@intel.com> <51C7B9B8.6090309@intel.com> <CAPM31RKq4sVR2_mU8PWx8dK+STQDj3Geyi8dVg3MnL=ymjfV6Q@mail.gmail.com> <51C867CF.70908@intel.com> <CAPM31RLTrQ_E6VAwO000zcL09F1oV7vgkjTJXY9wPC-pZ_6h0Q@mail.gmail.com> <20130628110730.GA6626@twins.programming.kicks-ass.net>
In-Reply-To: <20130628110730.GA6626@twins.programming.kicks-ass.net>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1343
Lines: 35

On 06/28/2013 07:07 PM, Peter Zijlstra wrote:
> On Fri, Jun 28, 2013 at 03:56:25AM -0700, Paul Turner wrote:
> 
>> So this is actually an interesting idea, but don't think of it as
>> overweight.  What "cfs_rq->blocked_load_avg / 2" means is actually
>> blocked_load_avg one period from now.  This is interesting because it
>> makes the (reasonable) supposition that blocked load is not about to
>> immediately wake, but will continue to decay.
>>
>> Could you try testing the gvr_lb_tip branch at
>> git://git.kernel.org/pub/scm/linux/kernel/git/pjt/sched-tip.git ?

OK. will try it next week.
>>
>> It's an extension to your series that tries to improve some of the
>> cpu_load interactions in an alternate way to the above.
>>
>> It seems a little better on one and two-socket machines; but we
>> couldn't reproduce/compare to your best performance results since they
>> were taken on larger machines.
> 
> Oh nice.. it does away with the entire cpu_load[] array thing. Just what
> Frederic needs for his NOHZ stuff as well -- he's currently abusing
> LB_BIAS for that.
> 


-- 
Thanks
    Alex
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/