From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Eelco Chaudron <echaudro@redhat.com>, jingjing.wu@intel.com
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2] app/testpmd: adds mlockall() to avoid pages being swapped out
Date: Tue, 10 Oct 2017 00:40:25 +0100 [thread overview]
Message-ID: <b6706f49-946f-7617-cdc8-1d96123d0a9b@intel.com> (raw)
In-Reply-To: <5482c65ba817cd8543fd9634943a1c3b34fd1081.1506672633.git.echaudro@redhat.com>
On 9/29/2017 9:11 AM, Eelco Chaudron wrote:
> v2:
> * Moved mlockall() after rte_eal_init() to allow rte_log() to be used
> * Check for mlockall() return value, and add an rte_log()
>
> 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>
Acked-by: Aaron Conole <aconole@redhat.com>
Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Applied to dpdk/master, thanks.
(Kept ACKs from previous version of the patch)
prev parent reply other threads:[~2017-10-09 23:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-29 8:11 Eelco Chaudron
2017-10-09 23:40 ` Ferruh Yigit [this message]
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