K 10
svn:author
V 5
sephe
K 8
svn:date
V 27
2016-04-27T04:51:28.631012Z
K 7
svn:log
V 451
hyperv/hn: Restart sending earlier once we gathered some free TX descs

This greatly reduces the oqdrops under heavy workload.

For TCP send/recv test (10K concurrent connections):
oqdrops is reduced by 17% on sending side, and 57% on receiving side.

For nginx-1.8/wrk-4 1KB object test (10K concurrent connections,
4 requests/connection):
oqdrops is reduced by 44% on nginx side, and 10% on wrk side.

MFC after:	1 week
Sponsored by:	Microsoft OSTC

END