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SubjectRe: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts
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

In gkrellm, you can see that it actually alternates between two values.

With pci=nomsi (and without the patch) I get lower but more consistent
results:

[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 511 MBytes 429 Mbits/sec
[ 3] 10.0-20.0 sec 465 MBytes 390 Mbits/sec
[ 3] 20.0-30.0 sec 481 MBytes 404 Mbits/sec
[ 3] 30.0-40.0 sec 466 MBytes 391 Mbits/sec
[ 3] 40.0-50.0 sec 465 MBytes 390 Mbits/sec
[ 3] 50.0-60.0 sec 463 MBytes 389 Mbits/sec
[ 3] 0.0-60.0 sec 2.78 GBytes 399 Mbits/sec

I suppose it's a side effect of the MSI acknowledgement loop. But who am
I to complain about higher average throughput? ;-)

> You can add my:
>
> Tested-by: Michael Buesch <mb@bu3sch.de>

Tested-by: Michael Riepe <michael.riepe@googlemail.com>

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


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