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(parent: 6069f3f) | patch
netvsc: fix NAPI performance regression
authorstephen hemminger <stephen@networkplumber.org>
Wed, 22 Mar 2017 21:50:57 +0000 (14:50 -0700)
committerDavid S. Miller <davem@davemloft.net>
Thu, 23 Mar 2017 02:38:55 +0000 (19:38 -0700)
commitf4f1c23d6e41f5ee4973a6da65cba1e1c536ec29
treed23392e3bca366f33c25b3dca2b1f24b7458a630tree | snapshot (tar.gz zip)
parent6069f3fbde03211f4b839e188eba2439f8b8326acommit | diff
netvsc: fix NAPI performance regression

When using NAPI, the single stream performance declined signifcantly
because the poll routine was updating host after every burst
of packets. This excess signalling caused host throttling.

This fix restores the old behavior. Host is only signalled
after the ring has been emptied.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/hyperv/hyperv_net.h diff | blob | blame | history
drivers/net/hyperv/netvsc.c diff | blob | blame | history