--On 04 July 2019 10:59 +0200 Christian M <christian.mar...@gmail.com> wrote:
From my tests I found that 10.4-RELEASE was as fast as you could expect (>10Gbit/s), then something changed in 11.0-RELEASE and carried on and got even worse in 12.0-RELEASE. Would it not be a good idea to begin there (10.4 -> 11.0), and try to identify what changes could impact the performance drop so significantly? This is perhaps a much harder task than it sounds for someone that knows nothing about what changes was made, and how difficult it would be to identify what changes actually could be relevant. Just a thought.
Looking at FreeBSD source - there doesn't appear to be a lot that has changed (at least in sys/xen) even from 10.4 through to 12 - certainly nothing networking I can see (unless I'm using svn log 'wrong', or there's other xen stuff within FreeBSD I should be looking at).
So this could be caused by other changes that have happened with the OS over that time.
If I get time - I'll see if I can follow the thread and setup a similar test system here, to be fair we've not had a performance issue with Xen Networking (as nothing we do needs the performance - yet). We've been much more plagued by packet weirdness which virtio has fixed.
Even if I can re-create things here - it may only be an "oh yeah, so it is" moment.
-Kp _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
