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Date: Mon, 25 Jun 2012 13:07:58 +0300 From: "Michael S. Tsirkin" <mst@...hat.com> To: Jason Wang <jasowang@...hat.com> Cc: krkumar2@...ibm.com, habanero@...ux.vnet.ibm.com, rusty@...tcorp.com.au, netdev@...r.kernel.org, mashirle@...ibm.com, linux-kernel@...r.kernel.org, virtualization@...ts.linux-foundation.org, edumazet@...gle.com, tahm@...ux.vnet.ibm.com, jwhan@...ewood.snu.ac.kr, akong@...hat.com, davem@...emloft.net, kvm@...r.kernel.org Subject: Re: [net-next RFC V4 PATCH 0/4] Multiqueue virtio-net On Mon, Jun 25, 2012 at 05:16:48PM +0800, 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 Didn't review yet, reacting this this paragraph: To avoid regressions, it seems reasonable to make the device use a single queue by default for now. Add a way to switch multiqueue on/off using ethtool. This way guest admin can tune the device for the workload manually until we manage to imlement some self-tuning heuristics. -- MST -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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