svn commit: r295742 - head/sys/dev/hyperv/netvsc

[Sepherosa Ziehau]

Author: sephe
Date: Thu Feb 18 07:00:47 2016
New Revision: 295742
URL: https://svnweb.freebsd.org/changeset/base/295742

Log:
  hyperv/hn: Always do transmission scheduling.
  
  This one gives the best performance so far.
  
  Reviewed by:	adrian
  Approved by:	adrian (mentor)
  MFC after:	1 week
  Sponsored by:	Microsoft OSTC
  Differential Revision:	https://reviews.freebsd.org/D5273

Modified:
  head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c

Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c	Thu Feb 18 06:55:05 2016	(r295741)
+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c	Thu Feb 18 07:00:47 2016	(r295742)
@@ -465,6 +465,13 @@ netvsc_attach(device_t dev)
 	    hn_tx_chimney_size < sc->hn_tx_chimney_max)
 		sc->hn_tx_chimney_size = hn_tx_chimney_size;
 
+	/*
+	 * Always schedule transmission instead of trying
+	 * to do direct transmission.  This one gives the
+	 * best performance so far.
+	 */
+	sc->hn_sched_tx = 1;
+
 	ctx = device_get_sysctl_ctx(dev);
 	child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));