Add support for pinning down Adreno GPU frequency for benchmarking (#8120)
This commit adds a new script for pinning down Adreno GPU frequencies
for benchmarking purposes. It also adjusted the scripts for pinning down
Pixel 6 Mali GPU frequencies for consistency.
diff --git a/build_tools/benchmarks/set_adreno_gpu_scaling_policy.sh b/build_tools/benchmarks/set_adreno_gpu_scaling_policy.sh
new file mode 100755
index 0000000..d2aca56
--- /dev/null
+++ b/build_tools/benchmarks/set_adreno_gpu_scaling_policy.sh
@@ -0,0 +1,89 @@
+#!/bin/sh
+
+# Copyright 2022 The IREE Authors
+#
+# Licensed under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+# Runs on a phone with Adreno GPU to set the GPU frequency scaling policy.
+
+################################### WARNING ####################################
+# This will overheat the phone if it's not on a cooling plate, resulting in #
+# thermal throttling. To prevent anything catching on fire, the actual GPU #
+# frequencies will be throttled to below the maximum, skewing your results. #
+################################################################################
+
+set -euo pipefail
+
+POLICY="${1:-performance}"
+
+readonly ADRENO_GPU_PATH="/sys/class/kgsl/kgsl-3d0"
+
+# Available frequencies are sorted, either in ascending or descending order.
+readonly ADRENO_MIN_FREQ=$(cat "${ADRENO_GPU_PATH}/devfreq/available_frequencies" | tr " " "\n" | sort -u -n | head -1)
+readonly ADRENO_MAX_FREQ=$(cat "${ADRENO_GPU_PATH}/devfreq/available_frequencies" | tr " " "\n" | sort -u -n | tail -1)
+
+# Power levels match available freqencies.
+readonly ADRENO_MAX_PWRLEVEL=0
+(( ADRENO_MIN_PWRLEVEL = $(cat "${ADRENO_GPU_PATH}/num_pwrlevels") - 1 ))
+readonly ADRENO_MIN_PWRLEVEL
+
+# Idle timers affect governor change and frequncy reset.
+readonly ADRENO_DEFAULT_IDLE_TIMER=80 # ms
+readonly ADRENO_1HOUR_IDLE_TIMER=3600000 # ms
+
+echo "GPU info (before changing frequency scaling policy):"
+echo 'model\t\tcur\t\tmin\t\tmax'
+echo "---------------------------------------------------------"
+paste \
+ "${ADRENO_GPU_PATH}/gpu_model" \
+ "${ADRENO_GPU_PATH}/devfreq/cur_freq" \
+ "${ADRENO_GPU_PATH}/devfreq/min_freq" \
+ "${ADRENO_GPU_PATH}/devfreq/max_freq"
+
+echo "Setting GPU frequency scaling policy to ${POLICY}"
+
+case "$POLICY" in
+ performance)
+ echo 1 > "${ADRENO_GPU_PATH}/force_clk_on"
+ echo ${ADRENO_1HOUR_IDLE_TIMER} > "${ADRENO_GPU_PATH}/idle_timer"
+
+ # Some devices only expose the msm-adreno-tz governor, so allow the
+ # following to fail.
+ echo performance > "${ADRENO_GPU_PATH}/devfreq/governor" || true
+
+ echo ${ADRENO_MAX_FREQ} > "${ADRENO_GPU_PATH}/gpuclk"
+ echo ${ADRENO_MAX_FREQ} > "${ADRENO_GPU_PATH}/devfreq/max_freq"
+ echo ${ADRENO_MAX_FREQ} > "${ADRENO_GPU_PATH}/devfreq/min_freq"
+
+ echo ${ADRENO_MAX_PWRLEVEL} > "${ADRENO_GPU_PATH}/max_pwrlevel"
+ echo ${ADRENO_MAX_PWRLEVEL} > "${ADRENO_GPU_PATH}/min_pwrlevel"
+ ;;
+ default)
+ echo 0 > "${ADRENO_GPU_PATH}/force_clk_on"
+ echo ${ADRENO_DEFAULT_IDLE_TIMER} > "${ADRENO_GPU_PATH}/idle_timer"
+
+ # msm-adreno-tz is the default governor for Adreno GPUs.
+ echo msm-adreno-tz > "${ADRENO_GPU_PATH}/devfreq/governor"
+
+ echo ${ADRENO_MAX_FREQ} > "${ADRENO_GPU_PATH}/devfreq/max_freq"
+ echo ${ADRENO_MIN_FREQ} > "${ADRENO_GPU_PATH}/devfreq/min_freq"
+
+ echo ${ADRENO_MAX_PWRLEVEL} > "${ADRENO_GPU_PATH}/max_pwrlevel"
+ echo ${ADRENO_MIN_PWRLEVEL} > "${ADRENO_GPU_PATH}/min_pwrlevel"
+ ;;
+ *)
+ echo "Unknown frequency scaling policy: ${POLICY}"
+ exit 1
+ ;;
+esac
+
+echo "GPU info (after changing frequency scaling policy):"
+echo 'model\t\tcur\t\tmin\t\tmax'
+echo "---------------------------------------------------------"
+paste \
+ "${ADRENO_GPU_PATH}/gpu_model" \
+ "${ADRENO_GPU_PATH}/devfreq/cur_freq" \
+ "${ADRENO_GPU_PATH}/devfreq/min_freq" \
+ "${ADRENO_GPU_PATH}/devfreq/max_freq"
