make plotting pingpong optional (for CaaS)

Author: sjpb

ansible/roles/hpctests/README.md

@@ -35,6 +35,7 @@ Role Variables
 The following variables should not generally be changed:
 - `hpctests_pingmatrix_modules`: Optional. List of modules to load for pingmatrix test. Defaults are suitable for OpenHPC 2.x cluster using the required packages.
 - `hpctests_pingpong_modules`: As above but for pingpong test.
+- `hpctests_pingpong_plot`: Whether to plot pingpong results. Default `yes`.
 - `hpctests_hpl_modules`: As above but for hpl tests.
 - `hpctests_hpl_version`: Version of HPL
 

ansible/roles/hpctests/defaults/main.yml

@@ -2,6 +2,7 @@
 hpctests_rootdir:
 hpctests_pingmatrix_modules: [gnu9 openmpi4]
 hpctests_pingpong_modules: [gnu9 openmpi4 imb]
+hpctests_pingpong_plot: yes
 hpctests_hpl_modules: [gnu9 openmpi4 openblas]
 hpctests_outdir: "{{ lookup('env', 'APPLIANCES_ENVIRONMENT_ROOT') }}/hpctests"
 hpctests_ucx_net_devices: all

ansible/roles/hpctests/tasks/pingpong.yml

@@ -52,6 +52,7 @@
     creates: "{{ _pingpong_local_output | dirname }}/latency.png"
   register: _pingpong_plot
   delegate_to: localhost
+  when: hpctests_pingpong_plot | bool
 
 - debug:
     msg: |
@@ -61,5 +62,7 @@
       Zero-size msg latency: {{ hpctests_pingpong_out['columns']['latency'][0] }} us
       Max bandwidth: {{ hpctests_pingpong_out['columns']['bandwidth'] | max }} Mbytes/s ({{ (hpctests_pingpong_out['columns']['bandwidth'] | max) / 125.0 }} Gbit/s)
 
+      {% if hpctests_pingpong_plot %}
       See plot on localhost:
       {{ _pingpong_plot.stdout }}
+      {% endif %}