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To: Eelco Chaudron <echaudro@redhat.com>, jingjing.wu@intel.com
Cc: dev@dpdk.org
References: <22990026376b08418cb0eb6f028840c03e89f47f.1505221429.git.echaudro@redhat.com>
From: Maxime Coquelin <maxime.coquelin@redhat.com>
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Date: Wed, 13 Sep 2017 11:15:18 +0200
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 (mx1.redhat.com [10.5.110.26]); Wed, 13 Sep 2017 09:15:22 +0000 (UTC)
Subject: Re: [dpdk-dev] [PATCH] app/testpmd: adds mlockall() to fix pages
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On 09/12/2017 03:08 PM, Eelco Chaudron wrote:
> Call the mlockall() function, to attempt to lock all of its process
> memory into physical RAM, and preventing the kernel from paging any
> of its memory to disk.
> 
> When using testpmd for performance testing, depending on the code path
> taken, we see a couple of page faults in a row. These faults effect
> the overall drop-rate of testpmd. On Linux the mlockall() call will
> prefault all the pages of testpmd (and the DPDK libraries if linked
> dynamically), even without LD_BIND_NOW.
> 
> Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
> ---
>   app/test-pmd/testpmd.c | 3 +++
>   1 file changed, 3 insertions(+)
> 

Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Thanks,
Maxime