linux-kernel - Re: [RFC 2/3] sched/topology: fix sched groups on NUMA machines with mesh topology

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Date:   Thu, 13 Apr 2017 11:16:42 -0400
From:   Rik van Riel <riel@...hat.com>
To:     Lauro Ramos Venancio <lvenanci@...hat.com>,
        linux-kernel@...r.kernel.org
Cc:     lwang@...hat.com, Mike Galbraith <efault@....de>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [RFC 2/3] sched/topology: fix sched groups on NUMA machines
 with mesh topology

On Thu, 2017-04-13 at 10:56 -0300, Lauro Ramos Venancio wrote:
> 
> SPECjbb2005 results on an 8 NUMA nodes machine with mesh topology
> 
> Threads       before              after          %
>            mean   stddev      mean    stddev
>   1       22801   1950        27059   1367     +19%
>   8       146008  50782       209193  826      +43%
>   32      351030  105111      522445  9051     +49%
>   48      365835  116571      594905  3314     +63%

Impressive!

> [1] http://www.ece.ubc.ca/~sasha/papers/eurosys16-final29.pdf
> 
> Signed-off-by: Lauro Ramos Venancio <lvenanci@...hat.com>

Acked-by: Rik van Riel <riel@...hat.com>