linux-kernel - Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts

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Message-ID: <4A180FD0.5050101@googlemail.com>
Date:	Sat, 23 May 2009 17:01:36 +0200
From:	Michael Riepe <michael.riepe@...glemail.com>
To:	Michael Buesch <mb@...sch.de>
CC:	David Dillow <dave@...dillows.org>,
	Francois Romieu <romieu@...zoreil.com>,
	Rui Santos <rsantos@...popie.com>,
	Michael Büker <m.bueker@...lin.de>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts

Hi!

Michael Buesch wrote:
> On Saturday 23 May 2009 16:35:28 Michael Riepe wrote:
> 
>>Hi!
>>
>>Michael Buesch wrote:
>>
>>
>>>Thanks a lot, Dave! This fixes the issue on my chip.
>>
>>Yep, it's stable here as well. And even a little faster than pci=nomsi.
>>The only strangeness I observed is that the throughput (measured with
>>iperf and a single TCP connection) varies:
>>
>>[ ID] Interval       Transfer     Bandwidth
>>[  3]  0.0-10.0 sec    667 MBytes    559 Mbits/sec
>>[  3] 10.0-20.0 sec    803 MBytes    673 Mbits/sec
>>[  3] 20.0-30.0 sec    802 MBytes    673 Mbits/sec
>>[  3] 30.0-40.0 sec    714 MBytes    599 Mbits/sec
>>[  3] 40.0-50.0 sec    669 MBytes    561 Mbits/sec
>>[  3] 50.0-60.0 sec    791 MBytes    663 Mbits/sec
>>[  3]  0.0-60.0 sec  4.34 GBytes    622 Mbits/sec
> 
> 
> Are you running the iperf server or client on the r8169?

The client, since I wanted to measure write throughput. The server is a
Lenovo Thinkpad T60 (e1000e driver).

> I'm running the iperf server on the r8169 and get the following results:
> 
> mb@...er:~$ iperf -c 192.168.2.50 -t120 -i10

In that case, the r8169 is receiving data (which never was a problem, at
least for me - it only lost interrupts in TX mode).

-- 
Michael "Tired" Riepe <michael.riepe@...glemail.com>
X-Tired: Each morning I get up I die a little
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