On 04.07.2012 12:13, Doug Barton wrote:
On 07/03/2012 23:29, Alexander V. Chernikov wrote:
On 04.07.2012 01:29, Doug Barton wrote:
Just curious ... what's the MTU on your FreeBSD box, and the Linux box?
In this particular setup - 1500. You're probably meaning type of mbufs
which are allocated by ixgbe driver?
1500 for both?
Well, AFAIR it was 1500. We've done a variety of tests half a year ago
with similar server and Intel and Mellanox equipment. Test results vary
from 4 to 6mpps in different setups (and mellanox seems to behave better
on Linux). If you're particularly interested in exact Linux performance
on exactly the same box I can try to do this possibly next week.
My point actually is the following:
It is possible to do linerate 10G (14.8mpps) forwarding with current
market-available hardware. Linux is going that way and it is much more
close than we do. Even dragonfly performs _much_ better than we do in
routing.
http://shader.kaist.edu/packetshader/ (and links there) are good example
of what is going on.
And no, I'm not thinking of the mbufs directly, although that may be a
side effect. I've seen cases on FreeBSD with em where setting the MTU to
9000 had unexpected (albeit pleasant) side effects on throughput vs.
Yes. Stock drivers has this problem, especially with IPv6 addresses.
We actually use our versions of em/igb/ixgbe drivers in production which
are free from several problems in stock driver.
(Tests, however, were done using stock driver)
system load. Since it was working better I didn't take the time to find
out why. However since you're obviously interested in finding out the
nitty-gritty details (and thank you for that) you might want to give it
a look, and a few test runs.
hth,
Doug
_______________________________________________
freebsd-net@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
