From: Thomas Monjalon <thomas@monjalon.net>
To: Aaron Conole <aconole@redhat.com>, Eelco Chaudron <echaudro@redhat.com>
Cc: dev@dpdk.org, jingjing.wu@intel.com, john.mcnamara@intel.com
Subject: Re: [dpdk-dev] [PATCH] app/testpmd: adds mlockall() to fix pages
Date: Tue, 12 Sep 2017 22:14:01 +0200 [thread overview]
Message-ID: <1863612.973jloI4LL@xps> (raw)
In-Reply-To: <f7to9qgynql.fsf@dhcp-25-97.bos.redhat.com>
12/09/2017 16:50, Aaron Conole:
> Eelco Chaudron <echaudro@redhat.com> writes:
>
> > 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>
It is interesting, but why make it in testpmd?
Maybe it should be documented in this guide:
http://dpdk.org/doc/guides/linux_gsg/nic_perf_intel_platform.html
next prev parent reply other threads:[~2017-09-12 20:14 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-12 13:08 Eelco Chaudron
2017-09-12 14:50 ` Aaron Conole
2017-09-12 20:14 ` Thomas Monjalon [this message]
2017-09-12 20:29 ` Aaron Conole
2017-09-12 22:13 ` Thomas Monjalon
2017-09-13 8:55 ` Eelco Chaudron
2017-09-13 12:28 ` Aaron Conole
2017-09-13 9:15 ` Maxime Coquelin
2017-09-13 9:39 ` Thomas Monjalon
2017-09-14 7:22 ` Eelco Chaudron
2017-09-19 7:28 ` Olivier MATZ
2017-09-21 12:24 ` Eelco Chaudron
2017-09-25 7:53 ` Olivier MATZ
2017-09-29 7:59 ` Eelco Chaudron
2017-09-29 8:07 ` Sergio Gonzalez Monroy
2017-09-29 8:15 ` Eelco Chaudron
2017-09-29 9:27 ` Sergio Gonzalez Monroy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1863612.973jloI4LL@xps \
--to=thomas@monjalon.net \
--cc=aconole@redhat.com \
--cc=dev@dpdk.org \
--cc=echaudro@redhat.com \
--cc=jingjing.wu@intel.com \
--cc=john.mcnamara@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).