CPU scaling

Author: kirklandsign

extension/benchmark/android/benchmark/android-llm-device-farm-test-spec.yml.j2

@@ -125,6 +125,7 @@ phases:
           adb -s $DEVICEFARM_DEVICE_UDID shell am start -W -n org.pytorch.minibench/.BenchmarkActivity \
             --es "model_dir" "/data/local/tmp/minibench"
         fi
+        adb -s $DEVICEFARM_DEVICE_UDID shell "echo performance > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor"
         adb -s $DEVICEFARM_DEVICE_UDID shell /data/local/tmp/minibench/xnn_executor_runner --model_path /data/local/tmp/minibench/*.pte --prof_result_path /data/local/tmp/prof_result.bin --num_warmup_iters 10
         adb -s $DEVICEFARM_DEVICE_UDID pull /data/local/tmp/prof_result.bin
         pip install prettytable