From: Michael Buesch <mb@bu3sch.de>
To: David Dillow <dave@thedillows.org>
Cc: "Michael Riepe" <michael.riepe@googlemail.com>,
"Francois Romieu" <romieu@fr.zoreil.com>,
"Rui Santos" <rsantos@grupopie.com>,
"Michael Büker" <m.bueker@berlin.de>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts
Date: Sat, 23 May 2009 18:50:14 +0200 [thread overview]
Message-ID: <200905231850.14725.mb@bu3sch.de> (raw)
In-Reply-To: <1243097173.4217.7.camel@obelisk.thedillows.org>
On Saturday 23 May 2009 18:46:13 David Dillow wrote:
> On Sat, 2009-05-23 at 18:12 +0200, Michael Riepe wrote:
> > If I use two connections (iperf -P2) and nail iperf to both threads of a
> > single core with taskset (the program is multi-threaded, just in case
> > you wonder), I get this:
> >
> > CPU 0+2: 0.0-60.0 sec 4.65 GBytes 665 Mbits/sec
> > CPU 1+3: 0.0-60.0 sec 6.43 GBytes 920 Mbits/sec
> >
> > That's quite a difference, isn't it?
> >
> > Now I wonder what CPU 0 is doing...
>
> Where does /proc/interrupts say the irqs are going?
>
>
>
For me it looks like this:
24: 52606581 0 0 0 PCI-MSI-edge eth0
So as I have the same CPU as Michael Riepe, I think CPU0 (core0) servicing
interrupts is related to the issue.
I'm wondering however, if this is expected behavior. iperf and interrupts will
pretty much saturate a core of the atom330. So it looks like a plain CPU bottleneck.
--
Greetings, Michael.
next prev parent reply other threads:[~2009-05-23 16:51 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-04 17:28 2.6.27.19 + 28.7: network timeouts for r8169 and 8139too Michael Büker
2009-03-04 22:43 ` Francois Romieu
2009-03-06 0:17 ` Michael Büker
2009-03-08 10:27 ` Tom Weber
2009-03-10 5:42 ` Tom Weber
2009-03-09 12:07 ` Rui Santos
2009-03-13 18:29 ` Rui Santos
2009-03-16 13:07 ` Rui Santos
2009-03-22 21:12 ` Francois Romieu
2009-03-22 21:19 ` Michael Buesch
2009-03-22 22:00 ` Francois Romieu
2009-03-22 22:09 ` Michael Buesch
2009-03-22 22:27 ` Francois Romieu
2009-03-22 22:38 ` Michael Buesch
2009-03-23 11:47 ` Michael Buesch
2009-03-23 12:47 ` Michael Buesch
2009-03-23 23:47 ` Francois Romieu
2009-03-24 9:43 ` Michael Buesch
2009-03-23 14:29 ` Michael Büker
2009-03-23 14:57 ` Rui Santos
2009-03-23 15:04 ` Michael Büker
2009-03-25 11:40 ` Rui Santos
2009-04-04 17:50 ` Michael Buesch
2009-05-10 13:38 ` Michael Riepe
2009-05-10 15:01 ` Michael S. Zick
2009-05-10 15:10 ` Michael S. Zick
2009-05-10 15:53 ` Michael Buesch
2009-05-10 16:27 ` Michael Riepe
2009-05-10 17:09 ` Michael S. Zick
2009-05-11 0:29 ` David Dillow
2009-05-11 20:48 ` Michael Buesch
2009-05-11 21:10 ` Michael Buesch
2009-05-11 21:29 ` David Dillow
2009-05-11 21:59 ` Michael Buesch
2009-05-12 20:29 ` Michael Riepe
2009-05-14 2:38 ` David Dillow
2009-05-14 18:37 ` Michael Riepe
2009-05-14 19:14 ` David Dillow
2009-05-14 19:42 ` Michael Riepe
2009-05-23 1:29 ` [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts David Dillow
2009-05-23 9:24 ` Michael Buesch
2009-05-23 14:35 ` Michael Riepe
2009-05-23 14:44 ` Michael Buesch
2009-05-23 15:01 ` Michael Riepe
2009-05-23 16:40 ` Michael Buesch
2009-05-23 14:51 ` David Dillow
2009-05-23 16:12 ` Michael Riepe
2009-05-23 16:45 ` Michael Buesch
2009-05-23 16:46 ` David Dillow
2009-05-23 16:50 ` Michael Buesch [this message]
2009-05-23 16:53 ` Michael Riepe
2009-05-23 17:03 ` David Dillow
2009-05-24 21:15 ` Francois Romieu
2009-05-24 22:55 ` David Dillow
2009-05-26 5:55 ` David Miller
2009-05-26 18:22 ` Michael Buesch
2009-05-26 21:52 ` David Miller
2009-05-26 22:14 ` David Miller
2009-05-26 22:40 ` Michael Riepe
2009-05-26 22:43 ` David Miller
2009-05-26 23:10 ` David Miller
2009-05-27 16:19 ` Michael Buesch
2009-06-16 19:32 ` Rui Santos
2009-08-21 20:57 ` Eric W. Biederman
2009-08-21 21:22 ` Michael Riepe
2009-08-21 22:59 ` David Dillow
2009-08-21 23:34 ` David Dillow
2009-08-22 0:24 ` Eric W. Biederman
2009-08-22 11:48 ` Eric W. Biederman
2009-08-22 12:07 ` Eric W. Biederman
2009-08-22 20:43 ` David Dillow
2009-08-23 17:17 ` Jarek Poplawski
2009-08-23 17:43 ` Michal Soltys
2009-08-23 17:54 ` Jarek Poplawski
2009-08-24 2:37 ` Eric W. Biederman
2009-08-25 0:51 ` Eric W. Biederman
2009-08-25 2:59 ` David Dillow
2009-08-25 20:22 ` Eric W. Biederman
2009-08-25 20:40 ` David Dillow
2009-08-25 21:24 ` Eric W. Biederman
2009-08-25 21:46 ` David Dillow
2009-08-25 22:19 ` Francois Romieu
2009-08-26 3:47 ` Eric W. Biederman
2009-08-26 7:58 ` [PATCH] r8169: Reduce looping in the interrupt handler Eric W. Biederman
2009-08-26 13:56 ` David Dillow
2009-08-26 13:59 ` David Dillow
2009-08-26 20:02 ` Eric W. Biederman
2009-08-26 21:30 ` Francois Romieu
2009-08-26 21:40 ` Eric W. Biederman
2009-08-27 5:24 ` Francois Romieu
2009-08-27 5:38 ` Eric W. Biederman
2009-08-27 23:20 ` Francois Romieu
2009-08-28 1:17 ` Eric W. Biederman
2009-08-28 1:29 ` David Dillow
2009-08-30 20:37 ` Francois Romieu
2009-08-30 20:53 ` Eric W. Biederman
2009-09-01 3:33 ` David Dillow
2009-09-01 9:20 ` Francois Romieu
2009-08-25 21:37 ` [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts Eric W. Biederman
2009-08-25 21:54 ` David Dillow
2009-08-25 23:11 ` Francois Romieu
2009-05-12 11:10 ` 2.6.27.19 + 28.7: network timeouts for r8169 and 8139too Krzysztof Halasa
2009-05-12 21:45 ` Michael Riepe
2009-05-13 6:11 ` Francois Romieu
2009-05-13 6:27 ` Michael Riepe
2009-05-13 19:34 ` Krzysztof Halasa
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