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Support pinning down Pixel 6 Mali GPU frequency #7801

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Merged
merged 2 commits into from
Dec 2, 2021
Merged

Support pinning down Pixel 6 Mali GPU frequency #7801

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bb9a3aa
Support pinning down Pixel 6 Mali GPU frequency
antiagainst Dec 1, 2021
1d04e7a
Fix formatting
antiagainst Dec 2, 2021
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31 changes: 26 additions & 5 deletions build_tools/benchmarks/run_benchmarks_on_android.py
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@
BenchmarkResults, BenchmarkRun,
execute_cmd,
execute_cmd_and_get_output,
get_android_device_model,
IREE_PRETTY_NAMES_TO_DRIVERS)

# All benchmarks' relative path against root build directory.
Expand Down Expand Up @@ -547,12 +548,25 @@ def filter_and_run_benchmarks(
return (benchmark_files, captures, errors)


def set_frequency_scaling_governor(governor: str):
def set_cpu_frequency_scaling_governor(governor: str):
git_root = execute_cmd_and_get_output(["git", "rev-parse", "--show-toplevel"])
cpu_script = os.path.join(
git_root, "build_tools/benchmarks/set_android_scaling_governor.sh")
adb_push_to_tmp_dir(cpu_script)
adb_execute(["su", "root", "./set_android_scaling_governor.sh", governor])
android_path = adb_push_to_tmp_dir(cpu_script)
adb_execute(["su", "root", android_path, governor])


def set_gpu_frequency_scaling_policy(policy: str):
git_root = execute_cmd_and_get_output(["git", "rev-parse", "--show-toplevel"])
device_model = get_android_device_model()
if device_model == "Pixel-6":
gpu_script = os.path.join(
git_root, "build_tools/benchmarks/set_pixel6_gpu_scaling_policy.sh")
else:
raise RuntimeError(
f"Unsupported device '{device_model}' for setting GPU scaling policy")
android_path = adb_push_to_tmp_dir(gpu_script)
adb_execute(["su", "root", android_path, policy])


def parse_arguments():
Expand Down Expand Up @@ -617,6 +631,10 @@ def check_exe_path(path):
"--pin_cpu_freq",
action="store_true",
help="Pin CPU frequency for all cores to the maximum. Requires root")
parser.add_argument("--pin-gpu-freq",
"--pin_gpu_freq",
action="store_true",
help="Pin GPU frequency to the maximum. Requires root")
parser.add_argument(
"--keep_going",
"--keep-going",
Expand Down Expand Up @@ -658,8 +676,11 @@ def main(args):
"need to update the map")

if args.pin_cpu_freq:
set_frequency_scaling_governor("performance")
atexit.register(set_frequency_scaling_governor, "schedutil")
set_cpu_frequency_scaling_governor("performance")
atexit.register(set_cpu_frequency_scaling_governor, "schedutil")
if args.pin_gpu_freq:
set_gpu_frequency_scaling_policy("always_on")
atexit.register(set_gpu_frequency_scaling_policy, "coarse_demand")

previous_benchmarks = None
previous_captures = None
Expand Down
1 change: 1 addition & 0 deletions build_tools/benchmarks/set_android_scaling_governor.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@ done

echo "CPU info (after changing governor):"
echo 'cpu\tgovernor\tcur\tmin\tmax'
echo "------------------------------------------------"
for i in `cat /sys/devices/system/cpu/present | tr '-' ' ' | xargs seq`; do \
echo "cpu${i}" | paste \
- \
Expand Down
54 changes: 54 additions & 0 deletions build_tools/benchmarks/set_pixel6_gpu_scaling_policy.sh
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Original file line number Diff line number Diff line change
@@ -0,0 +1,54 @@
#!/bin/sh

# Copyright 2021 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 Pixel 6 device itself 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:-always_on}"

readonly MALI_GPU_PATH="/sys/devices/platform/1c500000.mali"

echo "GPU info (before changing power policy):"
echo 'policy\t\t\t\t\tcur\tmin\tmax'
echo "--------------------------------------------------------------"
paste \
"${MALI_GPU_PATH}/power_policy" \
"${MALI_GPU_PATH}/cur_freq" \
"${MALI_GPU_PATH}/min_freq" \
"${MALI_GPU_PATH}/max_freq"

echo "Setting GPU power policy to ${POLICY}"

if [[ "$POLICY" == "always_on" ]]; then
echo "always_on" > "${MALI_GPU_PATH}/power_policy"
cat "${MALI_GPU_PATH}/max_freq" > "${MALI_GPU_PATH}/scaling_max_freq"
cat "${MALI_GPU_PATH}/max_freq" > "${MALI_GPU_PATH}/scaling_min_freq"
elif [[ "$POLICY" == "coarse_demand" ]]; then
echo "coarse_demand" > "${MALI_GPU_PATH}/power_policy"
cat "${MALI_GPU_PATH}/max_freq" > "${MALI_GPU_PATH}/scaling_max_freq"
cat "${MALI_GPU_PATH}/min_freq" > "${MALI_GPU_PATH}/scaling_min_freq"
else
echo "Unknown power policy: ${POLICY}"
exit 1
fi

echo "GPU info (after changing power policy):"
echo 'policy\t\t\t\t\tcur\tmin\tmax'
echo "--------------------------------------------------------------"
paste \
"${MALI_GPU_PATH}/power_policy" \
"${MALI_GPU_PATH}/cur_freq" \
"${MALI_GPU_PATH}/min_freq" \
"${MALI_GPU_PATH}/max_freq"