Enable DPDK OVS PMD Auto Load Balance

Add tasks to configure OVS PMD Auto Load Balance

Change-Id: I27b5910d8a9fc25e391cff7860cace52d146430a
(cherry picked from commit 84e1781888)

doc/source/roles/role-tripleo-ovs-dpdk.rst

@@ -89,7 +89,11 @@ Role Defaults
   - **Default**: ``false``
   - **Examples**: ``true``
 
+- ``tripleo_ovs_dpdk_pmd_auto_lb``
 
+  - **Description**: (*Optional*) Enable DPDK OVS PMD Auto Load Balance.
+  - **Default**: ``false``
+  - **Examples**: ``true``
 
 - ``tripleo_ovs_dpdk_pmd_load_threshold``
 

tripleo_ansible/roles/tripleo_ovs_dpdk/defaults/main.yml

@@ -28,6 +28,7 @@ tripleo_ovs_dpdk_revalidator_cores: ""
 tripleo_ovs_dpdk_handler_cores: ""
 tripleo_ovs_dpdk_emc_insertion_probablity: ""
 tripleo_ovs_dpdk_enable_tso: false
+tripleo_ovs_dpdk_pmd_auto_lb: false
 tripleo_ovs_dpdk_pmd_load_threshold: ""
 tripleo_ovs_dpdk_pmd_improvement_threshold: ""
 tripleo_ovs_dpdk_pmd_rebal_interval: ""

tripleo_ansible/roles/tripleo_ovs_dpdk/tasks/config.yml

@@ -144,6 +144,24 @@
     key: userspace-tso-enable
   when: not tripleo_ovs_dpdk_enable_tso|bool
 
+- name: Enable DPDK OVS PMD Auto Load Balance
+  openvswitch_db:
+    table: open_vswitch
+    record: .
+    col: other_config
+    key: pmd-auto-lb
+    value: "{{ tripleo_ovs_dpdk_pmd_auto_lb }}"
+  when: tripleo_ovs_dpdk_pmd_auto_lb|bool
+
+- name: Disable DPDK OVS PMD Auto Load Balance
+  openvswitch_db:
+    state: absent
+    table: open_vswitch
+    record: .
+    col: other_config
+    key: pmd-auto-lb
+  when: not tripleo_ovs_dpdk_pmd_auto_lb|bool
+
 - name: Set minimum PMD thread load threshold
   openvswitch_db:
     table: open_vswitch