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.org \
--cc=a.p.zijlstra@chello.nl \
--cc=ceph-devel@vger.kernel.org \
--cc=cl@linux.com \
--cc=davem@davemloft.net \
--cc=emunson@mgebm.net \
--cc=eric.dumazet@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mgorman@suse.de \
--cc=michaelc@cs.wisc.edu \
--cc=neilb@suse.de \
--cc=netdev@vger.kernel.org \
--cc=sage@inktank.com \
--cc=sebastian@breakpoint.cc \
--cc=torvalds@linux-foundation.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.