ci: Configure DUTs for max performance

Lock CPU and GPU frequency scaling on devices so to speed up test
execution and lower the variation of frame times from performance replay
jobs.

Also disable autosuspend of the GPU device.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-By: Rohan Garg <rohan.garg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7987>

.gitlab-ci/bare-metal/init.sh

@@ -46,6 +46,23 @@ if [ -n "$BM_START_XORG" ]; then
   export DISPLAY=:0
 fi
 
+# Disable GPU frequency scaling
+DEVFREQ_GOVERNOR=`find /sys/devices -name governor | grep gpu || true`
+echo performance > $DEVFREQ_GOVERNOR || true
+
+# Disable CPU frequency scaling
+echo performance | tee -a /sys/devices/system/cpu/cpufreq/policy*/scaling_governor || true
+
+# The below would be generally useful, but a bug in drm/msm leaves the GPU
+# device in a broken state if we try to do it before the first client (Xorg 
+# in this case) connects.
+# TODO: Make it inconditional once https://gitlab.freedesktop.org/drm/msm/-/issues/5 is solved in Mesa CI's kernel
+if [ -n "$BM_START_XORG" ]; then
+  # Disable GPU runtime PM
+  GPU_AUTOSUSPEND=`find /sys/devices -name autosuspend_delay_ms | grep gpu | head -1`
+  echo -1 > $GPU_AUTOSUSPEND || true
+fi
+
 if sh $BARE_METAL_TEST_SCRIPT; then
   OK=1
 else

.gitlab-ci/lava.yml.jinja2

@@ -82,9 +82,14 @@ actions:
 
           - modprobe amdgpu || true
 
+          # Disable GPU frequency scaling
           - DEVFREQ_GOVERNOR=`find /sys/devices -name governor | grep gpu || true`
           - echo performance > $DEVFREQ_GOVERNOR || true
 
+          # Disable CPU frequency scaling
+          - echo performance | tee -a /sys/devices/system/cpu/cpufreq/policy*/scaling_governor || true
+
+          # Disable GPU runtime PM
           - GPU_AUTOSUSPEND=`find /sys/devices -name autosuspend_delay_ms | grep gpu | head -1`
           - echo -1 > $GPU_AUTOSUSPEND || true