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authorChristian Trautman <ctrautma@redhat.com>2016-09-05 02:42:19 -0400
committerMaryam Tahhan <maryam.tahhan@intel.com>2016-09-14 14:43:49 +0000
commita325eb33fbe408243209b19f2d9cc288b2e57548 (patch)
tree035b86339e0ca4bfe2ff8ed6b9d2915dd9022bd6 /conf
parentacdb444a54124834acdde45107062eaf1452c119 (diff)
merge_buffers: Add option to disable merge buffer on qemu startup
In cases with VHost user and non-jumbo frame scenarios we can disable merge buffers on the guest NICS to improve performance. This patch adds this option to the 04_vnf conf file. JIRA: VSPERF-388 Change-Id: Ic1f776e90fdccaa5d5a0c952c96811a8747fe936 Signed-off-by: Christian Trautman <ctrautma@redhat.com>
Diffstat (limited to 'conf')
-rw-r--r--conf/04_vnf.conf6
1 files changed, 5 insertions, 1 deletions
diff --git a/conf/04_vnf.conf b/conf/04_vnf.conf
index 2e86b358..ac5559a2 100644
--- a/conf/04_vnf.conf
+++ b/conf/04_vnf.conf
@@ -140,11 +140,15 @@ GUEST_CORE_BINDING = [('#EVAL(6+2*#VMINDEX)', '#EVAL(7+2*#VMINDEX)')]
# using Vanilla OVS without enabling switch multi-queue.
GUEST_NIC_QUEUES = [0]
+# Disable VHost user guest NIC merge buffers by enabling the below setting. This
+# can improve performance when not using Jumbo Frames.
+GUEST_NIC_MERGE_BUFFERS_DISABLE = [True]
+
# Virtio-Net vhost thread CPU mapping. If using vanilla OVS with virtio-net,
# you can affinitize the vhost-net threads by enabling the below setting. There
# is one vhost-net thread per port per queue so one guest with 2 queues will
# have 4 vhost-net threads. If more threads are present than CPUs given, the
-# affinitize will overlap CPUs.
+# affinitize will overlap CPUs in a round robin fashion.
VSWITCH_VHOST_NET_AFFINITIZATION = False
VSWITCH_VHOST_CPU_MAP = [4,5,8,11]