em performs worse than igb (latency wise) in 12?

Kris von Mach mach at swishmail.com
Tue Apr 9 11:33:10 UTC 2019

On 4/7/2019 6:49 AM, Matthew Macy wrote:
> On Sat, Apr 6, 2019 at 1:23 PM Michael Butler
> <imb at protected-networks.net> wrote:
>> I'd be interested to see if substituting the port net/intel-em-kmod 
>> has any effect on the issue, 
> I would as well. igb, em, and lem are all the same driver in 12. This
> makes maintenance a lot easier. However, the older NICs have a lot of
> errata workarounds that aren't explicitly commented as such. My first
> guess is this card suffers from one such errata workaround that has
> been dropped in the update.

I've tried net/intel-em-kmod, it actually became worse went from 100 
requests/sec to about 90.

That makes sense about maintenance. Though I believe i350 is less than 5 
years old, HP's 366FLR version is 4. So it's not that old, and at least 
in gigabit level nic, is one of the best afaik.

Is there some other 1gig nic that is recommended for 12? Or is it time 
to switch to 10gbit? I've heard good things about Chelsio for 10gbit.

I went back to 11-Stable for now.

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