Vanilla_Multi_Queue: Add vanilla ovs multi-queue functionality

Adds multi-queue for vanilla OVS using virtio-net.

TunTap ports will use multi_queue parameter when ports are
created/deleted if guest nic queues are enabled and
vswitch is ovs vanilla. Virtio net will now add guest nic
queues to qemu command line if appropriate.

Reworked multi-queue documentation to reflect these changes.

Adds vhost net thread affinitization which is recommended
when performing vanilla ovs multi-queue.

Guests will require ethtool if using l2fwd or linux bridge
as the loopback application when vanilla ovs multi-queue
is enabled.

Modified dpdk setting in vswitch conf to be better worded
for separation from vanilla ovs multi-queue.

Updated release and installation doc for new vloop image
that includes required ethtool utility.

JIRA: VSPERF-373

Change-Id: Idb550515190b1a93390308c11f54da368f962512
Signed-off-by: Christian Trautman <ctrautma@redhat.com>

1 files changed, 15 insertions, 12 deletions

diff --git a/vswitches/ovs_vanilla.py b/vswitches/ovs_vanilla.py
index f880dfaf..332725e3 100644
--- a/vswitches/ovs_vanilla.py
+++ b/vswitches/ovs_vanilla.py
@@ -60,9 +60,10 @@ class OvsVanilla(IVSwitchOvs):
         # remove all tap interfaces
         for i in range(self._vport_id):
             tapx = 'tap' + str(i)
-            tasks.run_task(['sudo', 'ip', 'tuntap', 'del',
-                            tapx, 'mode', 'tap'],
-                           self._logger, 'Deleting ' + tapx, False)
+            tap_cmd_list = ['sudo', 'ip', 'tuntap', 'del', tapx, 'mode', 'tap']
+            if int(settings.getValue('GUEST_NIC_QUEUES')):
+                tap_cmd_list += ['multi_queue']
+            tasks.run_task(tap_cmd_list, self._logger, 'Deleting ' + tapx, False)
         self._vport_id = 0
 
         super(OvsVanilla, self).stop()
@@ -71,7 +72,6 @@ class OvsVanilla(IVSwitchOvs):
 
         self._module_manager.remove_modules()
 
-
     def add_phy_port(self, switch_name):
         """
         Method adds port based on detected device names.
@@ -111,14 +111,17 @@ class OvsVanilla(IVSwitchOvs):
         # Create tap devices for the VM
         tap_name = 'tap' + str(self._vport_id)
         self._vport_id += 1
-
-        tasks.run_task(['sudo', 'ip', 'tuntap', 'del',
-                        tap_name, 'mode', 'tap'],
-                       self._logger, 'Creating tap device...', False)
-
-        tasks.run_task(['sudo', 'ip', 'tuntap', 'add',
-                        tap_name, 'mode', 'tap'],
-                       self._logger, 'Creating tap device...', False)
+        tap_cmd_list = ['sudo', 'ip', 'tuntap', 'del', tap_name, 'mode', 'tap']
+        if int(settings.getValue('GUEST_NIC_QUEUES')):
+            tap_cmd_list += ['multi_queue']
+        tasks.run_task(tap_cmd_list, self._logger,
+                       'Creating tap device...', False)
+
+        tap_cmd_list = ['sudo', 'ip', 'tuntap', 'add', tap_name, 'mode', 'tap']
+        if int(settings.getValue('GUEST_NIC_QUEUES')):
+            tap_cmd_list += ['multi_queue']
+        tasks.run_task(tap_cmd_list, self._logger,
+                       'Creating tap device...', False)
 
         tasks.run_task(['sudo', 'ip', 'addr', 'flush', 'dev', tap_name],
                        self._logger, 'Remove IP', False)