From: Andrew Morton <akpm@linux-foundation•org>
To: Eric Dumazet <eric.dumazet@gmail•com>
Cc: Mel Gorman <mgorman@suse•de>, Sage Weil <sage@inktank•com>,
davem@davemloft•net, netdev@vger•kernel.org,
linux-kernel@vger•kernel.org, ceph-devel@vger•kernel.org,
neilb@suse•de, a.p.zijlstra@chello•nl, michaelc@cs•wisc.edu,
emunson@mgebm•net, sebastian@breakpoint•cc, cl@linux•com,
torvalds@linux-foundation•org
Subject: Re: regression with poll(2)
Date: Mon, 20 Aug 2012 16:20:46 -0700 [thread overview]
Message-ID: <20120820162046.f827f758.akpm@linux-foundation.org> (raw)
In-Reply-To: <1345455059.5158.302.camel@edumazet-glaptop>
On Mon, 20 Aug 2012 11:30:59 +0200
Eric Dumazet <eric.dumazet@gmail•com> wrote:
> On Mon, 2012-08-20 at 10:04 +0100, Mel Gorman wrote:
>
> > Can the following patch be tested please? It is reported to fix an fio
> > regression that may be similar to what you are experiencing but has not
> > been picked up yet.
> >
> > -
>
> This seems to help here.
>
> Boot your machine with "mem=768M" or a bit less depending on your setup,
> and try a netperf.
>
> -> before patch :
>
> # netperf
> MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
> localhost.localdomain () port 0 AF_INET
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 16384 16384 14.00 6.05
>
> -> after patch :
>
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 16384 16384 10.00 18509.73
"seem to help"? Was previous performance fully restored?
next prev parent reply other threads:[~2012-08-20 23:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-15 19:46 regression with poll(2)? Sage Weil
2012-08-15 20:45 ` Atchley, Scott
2012-08-15 21:03 ` Sage Weil
2012-08-19 18:49 ` regression with poll(2) Sage Weil
2012-08-20 8:07 ` Eric Dumazet
2012-08-20 9:04 ` Mel Gorman
2012-08-20 9:30 ` Eric Dumazet
2012-08-20 23:20 ` Andrew Morton [this message]
2012-08-21 5:16 ` Eric Dumazet
2012-08-20 16:54 ` Sage Weil
2012-08-21 7:05 ` Mel Gorman
2012-08-20 17:02 ` Linus Torvalds
2012-08-21 15:58 ` Andrew Morton
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=20120820162046.f827f758.akpm@linux-foundation.org \
--to=akpm@linux-foundation$(echo .)org \
--cc=a.p.zijlstra@chello$(echo .)nl \
--cc=ceph-devel@vger$(echo .)kernel.org \
--cc=cl@linux$(echo .)com \
--cc=davem@davemloft$(echo .)net \
--cc=emunson@mgebm$(echo .)net \
--cc=eric.dumazet@gmail$(echo .)com \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=mgorman@suse$(echo .)de \
--cc=michaelc@cs$(echo .)wisc.edu \
--cc=neilb@suse$(echo .)de \
--cc=netdev@vger$(echo .)kernel.org \
--cc=sage@inktank$(echo .)com \
--cc=sebastian@breakpoint$(echo .)cc \
--cc=torvalds@linux-foundation$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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