From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To: Jason Low <jason.low2@hp.com>
Cc: mingo@redhat.com, peterz@infradead.org,
linux-kernel@vger.kernel.org, efault@gmx.de, pjt@google.com,
preeti@linux.vnet.ibm.com, akpm@linux-foundation.org,
mgorman@suse.de, riel@redhat.com, aswin@hp.com,
scott.norton@hp.com
Subject: Re: [PATCH v4 1/3] sched: Reduce overestimating rq->avg_idle
Date: Mon, 2 Sep 2013 12:06:05 +0530 [thread overview]
Message-ID: <20130902063605.GU1720@linux.vnet.ibm.com> (raw)
In-Reply-To: <1377806736-3752-2-git-send-email-jason.low2@hp.com>
* Jason Low <jason.low2@hp.com> [2013-08-29 13:05:34]:
> When updating avg_idle, if the delta exceeds some max value, then avg_idle
> gets set to the max, regardless of what the previous avg was. This can cause
> avg_idle to often be overestimated.
>
> This patch modifies the way we update avg_idle by always updating it with the
> function call to update_avg() first. Then, if avg_idle exceeds the max, we set
> it to the max.
>
> Signed-off-by: Jason Low <jason.low2@hp.com>
> Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
> ---
next prev parent reply other threads:[~2013-09-02 6:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-29 20:05 [PATCH v4 0/3] sched: Limiting idle balance Jason Low
2013-08-29 20:05 ` [PATCH v4 1/3] sched: Reduce overestimating rq->avg_idle Jason Low
2013-09-02 6:36 ` Srikar Dronamraju [this message]
2013-08-29 20:05 ` [PATCH v4 2/3] sched: Consider max cost of idle balance per sched domain Jason Low
2013-08-30 9:46 ` Peter Zijlstra
2013-09-02 6:54 ` Srikar Dronamraju
2013-09-03 21:06 ` Jason Low
2013-08-29 20:05 ` [RFC][PATCH v4 3/3] sched: Periodically decay max cost of idle balance Jason Low
2013-08-30 10:18 ` Peter Zijlstra
2013-08-30 10:29 ` Peter Zijlstra
2013-09-04 6:02 ` Jason Low
2013-09-09 11:44 ` Peter Zijlstra
2013-09-09 20:40 ` Jason Low
2013-09-04 7:10 ` Jason Low
2013-09-09 11:49 ` Peter Zijlstra
2013-09-09 21:07 ` Jason Low
2013-09-10 1:40 ` Mike Galbraith
2013-09-12 10:31 ` [PATCH v4 0/3] sched: Limiting " Peter Zijlstra
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