old_style_multi-queue: Allows for multi-queue with ovs <= 2.5.0

Enables multi-queue option for OVS versions 2.5.0 or less with
dpdk. Instead of enabling MQ on a port by port basis this sets
the global MQ option after starting the ovs switch.

JIRA: VSPERF-372

Change-Id: I245c76779695518d0005122d8214bbf3f141bb96
Signed-off-by: Christian Trautman <ctrautma@redhat.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/docs/userguide/testusage.rst b/docs/userguide/testusage.rst
index c020b6ca..0c6e189d 100755
--- a/docs/userguide/testusage.rst
+++ b/docs/userguide/testusage.rst
@@ -463,6 +463,13 @@ VSPerf currently supports multi-queue with the following limitations:
      default upstream package versions installed by VSPerf satisfy this
      requirement.
 
+ 5. If using OVS versions 2.5.0 or less enable old style multi-queue as shown in
+    the ''02_vswitch.conf'' file.
+
+  .. code-block:: console
+
+     OVS_OLD_STYLE_MQ = True
+
 To enable multi-queue modify the ''02_vswitch.conf'' file to enable multi-queue
 on the switch.
 
@@ -476,7 +483,9 @@ applies by checking /sys/class/net/<eth_name>/device/numa_node and setting an
 appropriate mask to create PMD threads on the same numa node.
 
 When multi-queue is enabled, each dpdk or dpdkvhostuser port that is created
-on the switch will set the option for multiple queues.
+on the switch will set the option for multiple queues. If old style multi queue
+has been enabled a global option for multi queue will be used instead of the
+port by port option.
 
 To enable multi-queue on the guest modify the ''04_vnf.conf'' file.