igb enable_aim or flow_control causing tcp stalls?

[Jack Vogel]

I have no idea... but as a matter of principle I would see if updating to
later code,
both OS and especially the driver, reproduces the issue. Our validation
group
often has Linux as a link partner in testing, which can be good and bad, it
actually
sometimes has problems that FBSD on both sides doesn't.

Jack


On Mon, Jul 18, 2011 at 4:20 AM, Steven Hartland <killing at multiplay.co.uk>wrote:

> ----- Original Message ----- From: "Kevin Oberman" <kob6558 at gmail.com>
>
>>
>> Use "tcpdump -s0 -w file.pcap host remote-system" to see how it fails. You
>> may want to capture on both ends. Then use wireshark (in ports) to analyze
>> the data.
>>
>> There are other tools to provide other types of analysis, depending on the
>> type of problem.
>>
>
> I've managed to get a capture from both ends but its doesn't really make
> too
> much sense to me. You can clearly see the stall which starts at the 2.1
> second
> mark, and recovers at the 65 second mark but what's causing it is a
> mystery.
>
> I've attached what I believe is the relevant a snippet from each trace.
>
> At this point I believe I've eliminated aim and flow_control as these where
> both off when this test was preformed
>
> Any advice would be appreciated.
>
> The layout for this test was:-
> Source (7.0-RELEASE-p2 on em0) -> Cisco 6509 -> supermicro blade -> Target
> (8.2-RELEASE on igb0)
>
> I'm going to try and eliminate the Cisco next by going from two blades
> on the local supermicro blade switch.
>
>   Regards
>   Steve
>
>
>
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