2 files changed, 80 insertions, 0 deletions
diff --git a/ansible/roles/enable_cpu_isolation_on_boot/defaults/main.yml b/ansible/roles/enable_cpu_isolation_on_boot/defaults/main.yml
new file mode 100644
index 000000000..fda366682
--- /dev/null
+++ b/ansible/roles/enable_cpu_isolation_on_boot/defaults/main.yml
@@ -0,0 +1,21 @@
+# Copyright (c) 2018-2019 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+---
+grub_file: "/etc/default/grub"
+isolcpus_help_string: '  # added by Yardstick ansible isolcpus role'
+isolcpu_params: " isolcpus={{ ISOL_CPUS }} nohz=on nohz_full={{ ISOL_CPUS }} rcu_nocbs={{ ISOL_CPUS }}"
+enable_isolcpu: 'GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX{{ isolcpu_params }}"'
+update_grub:
+  Debian: "update-grub2"
+  RedHat: "grub2-mkconfig -o /boot/grub2/grub.cfg"
diff --git a/ansible/roles/enable_cpu_isolation_on_boot/tasks/main.yml b/ansible/roles/enable_cpu_isolation_on_boot/tasks/main.yml
new file mode 100644
index 000000000..e11288bfd
--- /dev/null
+++ b/ansible/roles/enable_cpu_isolation_on_boot/tasks/main.yml
@@ -0,0 +1,59 @@
+# Copyright (c) 2018-2019 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+---
+- name: Check if isolcpus is set by this role in {{ grub_file}}
+  lineinfile:
+    path: "{{ grub_file }}"
+    regexp: '{{ isolcpus_help_string }}'
+    state: absent
+  check_mode: yes
+  register: is_nsb_isolcpus_role
+  ignore_errors: True
+
+- name: Check if isolcpus is set by someone else
+  lineinfile:
+    path: "{{ grub_file }}"
+    regexp: "isolcpus="
+    state: absent
+  check_mode: yes
+  register: is_isolcpu
+  ignore_errors: True
+
+- name: Send warning that CPU isolation cannot be configured
+  debug:
+    msg: "WARNING: CPU isolation is not configured"
+  when:
+    - not is_nsb_isolcpus_role.changed and not is_isolcpu.changed
+    - ISOL_CPUS is not defined
+
+- name: Send info that CPU isolation configured by someone else
+  debug:
+    msg: "INFO: NOT modified, CPU isolation is already configured by someone."
+  when:
+    - not is_nsb_isolcpus_role.changed and is_isolcpu.changed
+
+- name: Add/update isolcpus when ISOL_CPUS is defined and not set at all or set by this role
+  lineinfile:
+    path: "{{ grub_file }}"
+    regexp: "{{ isolcpus_help_string }}"
+    line: '{{ enable_isolcpu }} {{ isolcpus_help_string }}'
+  when:
+    - is_nsb_isolcpus_role.changed or not is_nsb_isolcpus_role.changed and not is_isolcpu.changed
+    - ISOL_CPUS is defined
+
+- name: Update grub for bare metal usage
+  command: "{{ update_grub[ansible_os_family] }}"
+  when:
+    - is_nsb_isolcpus_role.changed or not is_nsb_isolcpus_role.changed and not is_isolcpu.changed
+    - ISOL_CPUS is defined