From: Ingo Molnar <mingo@elte.hu>
To: Nivedita Singhvi <niv@us.ibm.com>
Cc: Dave Sperry <dave_sperry@ieee.org>,
linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev <netdev@vger.kernel.org>
Subject: Re: Poor UDP performance using 2.6.21-rc5-rt5
Date: Mon, 2 Apr 2007 07:55:09 +0200 [thread overview]
Message-ID: <20070402055509.GC3284@elte.hu> (raw)
In-Reply-To: <461010F9.7040706@us.ibm.com>
* Nivedita Singhvi <niv@us.ibm.com> wrote:
> Dave Sperry wrote:
> >Hi
>
> (adding netdev to cc list)
in general (except of course those netdev folks that are interested in
-rt+networking performance matters) i'd suggest we analyze this in an
-rt specific way - netdev shouldnt have to bother about this.
> And I'm assuming nothing very different in the stats or errors through
> both runs?
one thing to check would be whether both kernels use the same
clocksource, via:
cat /sys/devices/system/clocksource/clocksource0/current_clocksource
but at first sight there's no clocksource related overhead in the
oprofile.
Ingo
next prev parent reply other threads:[~2007-04-02 5:55 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-01 19:15 Poor UDP performance using 2.6.21-rc5-rt5 Dave Sperry
2007-04-01 20:07 ` Nivedita Singhvi
2007-04-01 22:00 ` Dave Sperry
2007-04-02 5:55 ` Ingo Molnar [this message]
2007-04-02 6:30 ` Ingo Molnar
2007-04-02 7:21 ` Ingo Molnar
2007-04-02 8:17 ` Dave Sperry
2007-04-02 9:37 ` Ingo Molnar
2007-04-02 14:09 dave_sperry@ieee.org
2007-04-02 14:23 ` Ingo Molnar
2007-04-02 17:17 dave_sperry@ieee.org
2007-04-02 17:50 dave_sperry@ieee.org
2007-04-02 19:04 ` Ingo Molnar
2007-04-03 0:09 ` David Sperry
2007-04-03 6:43 ` Ingo Molnar
2007-04-03 8:51 ` Ingo Molnar
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