Hi: This series tries to implement tx batching support for vhost. This was done by using MSG_MORE as a hint for under layer socket. The backend (e.g tap) can then batch the packets temporarily in a list and submit it all once the number of bacthed exceeds a limitation. Tests shows obvious improvement on guest pktgen over over mlx4(noqueue) on host: Mpps -+% rx-frames = 0 0.91 +0% rx-frames = 4 1.00 +9.8% rx-frames = 8 1.00 +9.8% rx-frames = 16 1.01 +10.9% rx-frames = 32 1.07 +17.5% rx-frames = 48 1.07 +17.5% rx-frames = 64 1.08 +18.6% rx-frames = 64 (no MSG_MORE) 0.91 +0% Changes from V3: - use ethtool instead of module parameter to control the maximum number of batched packets - avoid overhead when MSG_MORE were not set and no packet queued Changes from V2: - remove uselss queue limitation check (and we don't drop any packet now) Changes from V1: - drop NAPI handler since we don't use NAPI now - fix the issues that may exceeds max pending of zerocopy - more improvement on available buffer detection - move the limitation of batched pacekts from vhost to tuntap Please review. Thanks Jason Wang (3): vhost: better detection of available buffers vhost_net: tx batching tun: rx batching drivers/net/tun.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++---- drivers/vhost/net.c | 23 ++++++++++++++-- drivers/vhost/vhost.c | 8 ++++-- 3 files changed, 96 insertions(+), 11 deletions(-) -- 2.7.4 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization