[Bug 248652] iflib: netmap pkt-gen large TX performance difference between 11-STABLE and 12-STABLE/CURRENT on ix & ixl NIC

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Mon Oct 26 21:47:22 UTC 2020


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652

--- Comment #39 from Vincenzo Maffione <vmaffione at FreeBSD.org> ---
(In reply to Sylvain Galliano from comment #37)
Ok thanks. It was worth a try. I guess we'll need some help from Intel here.

In the meanwhile, I would like to commit the netmap tx timer change only.
I attached a cleaned up patch, with an hardcoded value for the netmap timer.
I would avoid to add a new sysctl for something that may be changed again soon.

In any case, the patch is meant to improve a lot the current situation for both
ix and ixl.
Could you please run your tests again on ix and ixl to check that you get
numbers that are consistent with the ones you reported in comment n. 16?

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