On 6/25/2012 3:07 AM, Michael S. Tsirkin wrote:
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 optimizationDidn'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.
Ethtool already has this switch 'ethtool -L' can be used to set the number tx/rx channels. So you would likely just need to add a set_channels hook. .John -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
