linux-kernel - Re: [PATCH 2/2] mm, numa: Migrate pages to local nodes quicker early in the lifetime of a task

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Date:   Mon, 01 Oct 2018 11:41:24 -0400
From:   Rik van Riel <riel@...riel.com>
To:     Mel Gorman <mgorman@...hsingularity.net>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
        Jirka Hladky <jhladky@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>
Subject: Re: [PATCH 2/2] mm, numa: Migrate pages to local nodes quicker
 early in the lifetime of a task

On Mon, 2018-10-01 at 11:05 +0100, Mel Gorman wrote:
> With this patch applied, STREAM performance is the same as 4.17 even
> though
> processes are not spread cross-node prematurely. Other workloads
> showed
> a mix of minor gains and losses. This is somewhat expected most
> workloads
> are not very sensitive to the starting conditions of a process.
> 
>                          4.19.0-rc5             4.19.0-
> rc5                 4.17.0
>                          numab-v1r1       fastmigrate-
> v1r1                vanilla
> MB/sec copy     43298.52 (   0.00%)    47335.46
> (   9.32%)    47219.24 (   9.06%)
> MB/sec scale    30115.06 (   0.00%)    32568.12
> (   8.15%)    32527.56 (   8.01%)
> MB/sec add      32825.12 (   0.00%)    36078.94
> (   9.91%)    35928.02 (   9.45%)
> MB/sec triad    32549.52 (   0.00%)    35935.94
> (  10.40%)    35969.88 (  10.51%)
> 
> Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>

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