Messages in this thread | | | Date | Mon, 25 Jun 2012 10:49:42 -0700 | From | Sridhar Samudrala <> | Subject | Re: [net-next RFC V4 PATCH 0/4] Multiqueue virtio-net |
| |
On 6/25/2012 2:16 AM, Jason Wang wrote: > Hello All: > > This series is an update version of multiqueue virtio-net driver based on > Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the > packets reception and transmission. Please review and comments. > > Test Environment: > - Intel(R) Xeon(R) CPU E5620 @ 2.40GHz, 8 cores 2 numa nodes > - Two directed connected 82599 > > Test Summary: > > - Highlights: huge improvements on TCP_RR test > - Lowlights: regression on small packet transmission, higher cpu utilization > than single queue, need further optimization Does this also scale with increased number of VMs?
Thanks Sridhar > > Analysis of the performance result: > > - I count the number of packets sending/receiving during the test, and > multiqueue show much more ability in terms of packets per second. > > - For the tx regression, multiqueue send about 1-2 times of more packets > compared to single queue, and the packets size were much smaller than single > queue does. I suspect tcp does less batching in multiqueue, so I hack the > tcp_write_xmit() to forece more batching, multiqueue works as well as > singlequeue for both small transmission and throughput > > - I didn't pack the accelerate RFS with virtio-net in this sereis as it still > need further shaping, for the one that interested in this please see: > http://www.mail-archive.com/kvm@vger.kernel.org/msg64111.html > >
| |