Re: [PATCH V3 1/2] vhost_net: stop polling socket during rx processing

David Miller
2016-06-07T21:46:33Z

From: Jason Wang <jasowang@redhat.com>
Date: Wed, 1 Jun 2016 01:56:33 -0400

> We don't stop rx polling socket during rx processing, this will lead
> unnecessary wakeups from under layer net devices (E.g
> sock_def_readable() form tun). Rx will be slowed down in this
> way. This patch avoids this by stop polling socket during rx
> processing. A small drawback is that this introduces some overheads in
> light load case because of the extra start/stop polling, but single
> netperf TCP_RR does not notice any change. In a super heavy load case,
> e.g using pktgen to inject packet to guest, we get about ~8.8%
> improvement on pps:
>
> before: ~1240000 pkt/s
> after: ~1350000 pkt/s
>
> Signed-off-by: Jason Wang <jasowang@redhat.com>

Applied.