AlacrityVM numbers updated for 31-rc4

Gregory Haskins
2009-08-12T20:43:28Z

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I re-ran the numbers on 10GE against the actual alacrityvm v0.1 release
available in git on kernel.org.

I tried to include the newly announced "vhost" driver (Michael Tsirkin)
for virtio acceleration, but ran into issues getting the patches to apply.

For now, this includes native, virtio-u (virtio-userspace), and venet
all running on 31-rc4. If I can resolve the issue with Michaels
patches, I will add "virtio-k" (virtio-kernel) to the mix as well. For
now, here are the results for 1500mtu:

native: 7388Mb/s, 29.8us rtt (33505 tps udp-rr)
venet: 3654Mb/s, 56.8us rtt (17600 tps udp-rr)
virtio-u: 1955Mb/s, 4016.0us rtt ( 249 tps udp-rr)

Note that on one particular boot-session, I actually saw venet run
consistently 4600Mb/s, and virtio-u run consistently 2800Mb/s. I am not
sure why other runs resulted in deterministically lower numbers, but I
included the average of the low runs to be conservative, ~3600, ~1900
respectively).

Of interest here is that native made a huge jump (2.6.29 was more like
4Gb/s), and also that KVM regressed a bit, especially compared to native
numbers. The cause for either of these changes is not known at this
time, but I will investigate the cause over the next few days.

In any case, I have updated the graphs on the AlacrityVM wiki to reflect
these latest numbers:

http://developer.novell.com/wiki/index.php/AlacrityVM

Kind Regards,
-Greg