[Intel-wired-lan] [E1000-devel] i40e card Tx resets

zhuyj zyjzyj2000 at gmail.com
Wed Mar 16 11:46:14 UTC 2016


On 03/16/2016 11:25 AM, Sowmini Varadhan wrote:
> On (03/16/16 11:19), zhuyj wrote:
>> Thanks for your reply.
>> Yesterday I made tests with rds-tools. It is very pity that I can
>> not reproduce my problem with rds-tools.
>>
>> But with pktgen tools, I can reproduce this problem easily. And I
>> found that if I set the packet size to 17792 or less than this size,
>> this problem would not occur. But if I set the packet size > 17792,
>> for example 17793, my problem would occur.
> I think it might have to do with number of sockets/cpu/cores and
> the irq balancing issues.
>
>> As such, maybe the packet size triggers my problem. I am not sure
>> that the packet size will trigger your size.
> In my case I did try against netperf request-response (but that is
> single threaded) and iperf (but that is unidirectional, i.e.,
> it is not a bidirectional request-response test)
>
> perhaps if you share the pktgen config (did you change the
> code itself)? some of the i40e experts at intel (who are also
> on the to/cc lists of this mail) can try it out themselves?
>
> I still think that the fundamental problem can be identified
> by looking for what's causing the mdd event.
>
> It must be some type of bug, because ixgbe works fine for me,
> and this seems like a regression on that performance.
>
> --Sowmini
>
It is busy today. Tomorrow I will share the steps about pktgen tools.

Best Regards!
Zhu Yanjun


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