Re: performance regression in virtio-net in 2.6.32-rc4

2009-10-27 Thread Avi Kivity
On 10/26/2009 08:48 PM, Michael S. Tsirkin wrote: Hi! I noticed a performance regression in virtio net: going from 2.6.31 to 2.6.32-rc4 I see this, for guest to host communication: Any tips on debugging this? Lacking better advice, a bisect can help as a last resort. 'git bisect start

Re: performance regression in virtio-net in 2.6.32-rc4

2009-10-27 Thread Rusty Russell
On Tue, 27 Oct 2009 05:18:35 am Michael S. Tsirkin wrote: Hi! I noticed a performance regression in virtio net: going from 2.6.31 to 2.6.32-rc4 I see this, for guest to host communication: ... Size SizeSize Time Throughput bytes bytes bytessecs.10^6bits/sec 87380

performance regression in virtio-net in 2.6.32-rc4

2009-10-26 Thread Michael S. Tsirkin
Hi! I noticed a performance regression in virtio net: going from 2.6.31 to 2.6.32-rc4 I see this, for guest to host communication: [...@tuck ~]$ ssh robin sh streamtest1 TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 11.0.0.3 (11.0.0.3) port 0 AF_INET : demo Recv SendSend Socket