Hi all:
This series try to add net device rx busy polling support in
vhost_net. This is done through:
- adding socket rx busy polling support for tun/macvtap by marking
napi_id.
- vhost_net will try to find the net device through napi_id and do
busy polling if possible.
TCP_RR tests on two mlx4s show some improvements:
smp=1 queue=1
size/session/+thu%/+normalize%/+tpkts%/+rpkts%/+ioexits%/
1/ 1/ +4%/ +3%/ +3%/ +3%/ +22%
1/ 50/ +2%/ +2%/ +2%/ +2%/ 0%
1/ 100/ +1%/ 0%/ +1%/ +1%/ -1%
1/ 200/ +2%/ +1%/ +2%/ +2%/ 0%
64/ 1/ +1%/ +3%/ +1%/ +1%/ +1%
64/ 50/ 0%/ 0%/ 0%/ 0%/ -1%
64/ 100/ +1%/ 0%/ +1%/ +1%/ 0%
64/ 200/ 0%/ 0%/ +2%/ +2%/ 0%
256/ 1/ +2%/ +2%/ +2%/ +2%/ +2%
256/ 50/ +3%/ +3%/ +3%/ +3%/ 0%
256/ 100/ +1%/ +1%/ +2%/ +2%/ 0%
256/ 200/ 0%/ 0%/ +1%/ +1%/ +1%
1024/ 1/ +2%/ +2%/ +2%/ +2%/ +2%
1024/ 50/ -1%/ -1%/ -1%/ -1%/ -2%
1024/ 100/ +1%/ +1%/ 0%/ 0%/ -1%
1024/ 200/ +2%/ +1%/ +2%/ +2%/ 0%
smp=8 queue=1
size/session/+thu%/+normalize%/+tpkts%/+rpkts%/+ioexits%/
1/ 1/ +1%/ -5%/ +1%/ +1%/ 0%
1/ 50/ +1%/ 0%/ +1%/ +1%/ -1%
1/ 100/ -1%/ -1%/ -2%/ -2%/ -4%
1/ 200/ 0%/ 0%/ 0%/ 0%/ -1%
64/ 1/ -2%/ -10%/ -2%/ -2%/ -2%
64/ 50/ -1%/ -1%/ -1%/ -1%/ -2%
64/ 100/ -1%/ 0%/ 0%/ 0%/ -1%
64/ 200/ -1%/ -1%/ 0%/ 0%/ 0%
256/ 1/ +7%/ +25%/ +7%/ +7%/ +7%
256/ 50/ +2%/ +2%/ +2%/ +2%/ -1%
256/ 100/ -1%/ -1%/ -1%/ -1%/ -3%
256/ 200/ +1%/ 0%/ 0%/ 0%/ 0%
1024/ 1/ +5%/ +15%/ +5%/ +5%/ +4%
1024/ 50/ 0%/ 0%/ -1%/ -1%/ -1%
1024/ 100/ -1%/ -1%/ -1%/ -1%/ -2%
1024/ 200/ -1%/ 0%/ -1%/ -1%/ -1%
smp=8 queue=8
size/session/+thu%/+normalize%/+tpkts%/+rpkts%/+ioexits%/
1/ 1/ +5%/ +2%/ +5%/ +5%/ 0%
1/ 50/ +2%/ +2%/ +3%/ +3%/ -20%
1/ 100/ +5%/ +5%/ +5%/ +5%/ -13%
1/ 200/ +8%/ +8%/ +6%/ +6%/ -12%
64/ 1/ 0%/ +4%/ 0%/ 0%/ +18%
64/ 50/ +6%/ +5%/ +5%/ +5%/ -7%
64/ 100/ +4%/ +4%/ +5%/ +5%/ -12%
64/ 200/ +5%/ +5%/ +5%/ +5%/ -12%
256/ 1/ 0%/ -3%/ 0%/ 0%/ +1%
256/ 50/ +3%/ +3%/ +3%/ +3%/ -2%
256/ 100/ +6%/ +5%/ +5%/ +5%/ -11%
256/ 200/ +4%/ +4%/ +4%/ +4%/ -13%
1024/ 1/ 0%/ -3%/ 0%/ 0%/ -6%
1024/ 50/ +1%/ +1%/ +1%/ +1%/ -10%
1024/ 100/ +4%/ +4%/ +5%/ +5%/ -11%
1024/ 200/ +4%/ +5%/ +4%/ +4%/ -12%
Thanks
Jason Wang (6):
net: skbuff: don't use union for napi_id and sender_cpu
tuntap: socket rx busy polling support
macvtap: socket rx busy polling support
net: core: factor out core busy polling logic to sk_busy_loop_once()
net: export napi_by_id()
vhost_net: net device rx busy polling support
drivers/net/macvtap.c | 4 ++++
drivers/net/tun.c | 3 ++-
drivers/vhost/net.c | 22 ++++++++++++++++--
include/linux/skbuff.h | 10 ++++----
include/net/busy_poll.h | 8 +++++++
net/core/dev.c | 62 ++++++++++++++++++++++++++++---------------------
6 files changed, 75 insertions(+), 34 deletions(-)
--
2.5.0
