Re: [net-next RFC V4 PATCH 0/4] Multiqueue virtio-net
On 06/26/2012 01:49 AM, Sridhar Samudrala wrote:
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 thepackets 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 utilizationthan single queue, need further optimizationDoes this also scale with increased number of VMs?
Hi Sridhar: Good suggestions, I didn't measure them. I would run test and post them. Thanks
Thanks SridharAnalysis 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 packetscompared 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 thetcp_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 stillneed further shaping, for the one that interested in this please see: http://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg64111.html-- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
-- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
[Linux Kernel Discussion] [Ethernet Bridging] [Linux Wireless Networking] [Linux Bluetooth Networking] [Linux Networking Users] [VLAN] [Git] [IETF Annouce] [Linux Assembly] [Security] [Bugtraq] [Photo] [Singles Social Networking] [Yosemite Information] [MIPS Linux] [ARM Linux Kernel] [ARM Linux] [Linux Virtualization] [Linux Security] [Linux IDE] [Linux RAID] [Linux SCSI] [Free Dating]