On Wed, Jul 16, 2014 at 02:21:44PM +0800, Jason Wang wrote: > Hi all: > > This series introduces the support for rx busy polling support. This > was useful for reduing the latency for a kvm guest. Patch 1-2 > introduces helpers which is used for rx busy polling. Patch 3 > implement the main function. > > Test was done between a kvm guest and an external host. Two hosts were > connected through 40gb mlx4 cards. With both busy_poll and busy_read are > set to 50 in guest, 1 byte netperf tcp_rr shows 116% improvement: > transaction rate was increased from 9151.94 to 19787.37. > > Changes from V1: > - split the patch info smaller ones > - add more details about test setup/configuration > > Please review. Generally I think we should let host know we are polling. For example, kick the rq or something. Or maybe add another io address. Something like this would need a new feature flag though, so I'm fine with just polling in guest until that is available. > Jason Wang (3): > virtio-net: introduce helpers to enable and disable all NAPIs > virtio-net: introduce virtnet_receive() > virtio-net: rx busy polling support > > drivers/net/virtio_net.c | 234 ++++++++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 221 insertions(+), 13 deletions(-) > > -- > 1.8.3.1 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
