From: Ingo Molnar <mingo@elte.hu>
To: David Sperry <dave_sperry@ieee.org>
Cc: "'dave_sperry@ieee.org'" <dasperry@comcast.net>,
linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Poor UDP performance using 2.6.21-rc5-rt5
Date: Tue, 3 Apr 2007 08:43:04 +0200 [thread overview]
Message-ID: <20070403064304.GA17938@elte.hu> (raw)
In-Reply-To: <001d01c77584$6a92ffe0$7901a8c0@dad>
* David Sperry <dave_sperry@ieee.org> wrote:
> > > I think there is some kind of bad behavior happening in the Nvidia
> > > driver with respect to softirq-net-tx and IRQ-8406.
> >
> > yes. Part of the problem is that the forcedeth.c driver does not
> > fully support NAPI - today i've implemented those bits (see them
> > below), based on your testcase. The other part is that the Intel NIC
> > uses MSI, while foredeth uses fasteoi, correct? [you can see this in
> > /proc/interrupts]
>
> In my case forcedeth seems to be picking up MSI for eth2 & eth3
> Could this be part of my problem?
i dont think it should be a problem.
Ingo
next prev parent reply other threads:[~2007-04-03 6:43 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-02 17:50 Poor UDP performance using 2.6.21-rc5-rt5 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 [this message]
2007-04-03 8:51 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2007-04-02 17:17 dave_sperry@ieee.org
2007-04-02 14:09 dave_sperry@ieee.org
2007-04-02 14:23 ` Ingo Molnar
2007-04-01 19:15 Dave Sperry
2007-04-01 20:07 ` Nivedita Singhvi
2007-04-01 22:00 ` Dave Sperry
2007-04-02 5:55 ` Ingo Molnar
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
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