[Intel-wired-lan] [next-queue 15/17] fm10k: change default Tx ITR to 25usec
Keller, Jacob E
jacob.e.keller at intel.com
Wed Oct 14 15:59:51 UTC 2015
On Wed, 2015-10-14 at 08:15 -0700, Alexander Duyck wrote:
> Even 40K might be a bit restrictive. I've found that 10Gb NICs need
> about 12K interrupts per second to avoid depleting the socket buffers
> in
> the case of a UDP test. You might want to see if you see performance
> gains by taking it up to 50K maybe even 60K. As far as test cases to
> use for tuning it would be useful to use a UDP_STREAM test instead of
> TCP_STREAM since UDP is not bound by the link partner throughput.
>
> - Alex
Thanks Alex. I tried with Tx set to 0usec up to 25, and for my tests
with both TCP and UDP trials, I topped out at 25 and didn't see
improvement beyond that. I think it's a reasonable default, but I
likely have other areas on my system that need tuning first.
I can give some more tests specifically with UDP again to see if any
other changes made that not true.
Regards,
Jake
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