Message-ID: <50B41346.3030606@intel.com>
Date: Tue, 27 Nov 2012 09:11:34 +0800
From: Alex Shi <alex.shi@intel.com>
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To: Benjamin Segall <bsegall@google.com>
CC: mingo@redhat.com, peterz@infradead.org, pjt@google.com,
        preeti@linux.vnet.ibm.com, vincent.guittot@linaro.org,
        linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 0/5] enable runnable load avg in load balance
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On 11/27/2012 03:03 AM, Benjamin Segall wrote:
> So, I've been trying out using the runnable averages for load balance in
> a few ways, but haven't actually gotten any improvement on the
> benchmarks I've run. I'll post my patches once I have the numbers down,
> but it's generally been about half a percent to 1% worse on the tests
> I've tried.

Did you tried this rfc patch? and what's the result of it? :)

> 
> The basic idea is to use (cfs_rq->runnable_load_avg +
> cfs_rq->blocked_load_avg) (which should be equivalent to doing
> load_avg_contrib on the rq) for cfs_rqs and possibly the rq, and
> p->se.load.weight * p->se.avg.runnable_avg_sum / period for tasks.
> 
> I have not yet tried including wake_affine, so this has just involved
> h_load (task_load_down and task_h_load), as that makes everything
> (besides wake_affine) be based on either the new averages or the
> rq->cpu_load averages.
> 

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