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Diffstat (limited to 'tools/testing/selftests/intel_pstate/run.sh')
| -rwxr-xr-x | tools/testing/selftests/intel_pstate/run.sh | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh new file mode 100755 index 000000000..e7008f614 --- /dev/null +++ b/tools/testing/selftests/intel_pstate/run.sh @@ -0,0 +1,128 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# This test runs on Intel x86 based hardware which support the intel_pstate +# driver. The test checks the frequency settings from the maximum turbo +# state to the minimum supported frequency, in decrements of 100MHz. The +# test runs the aperf.c program to put load on each processor. +# +# The results are displayed in a table which indicate the "Target" state, +# or the requested frequency in MHz, the Actual frequency, as read from +# /proc/cpuinfo, the difference between the Target and Actual frequencies, +# and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what +# pstate the cpu is in, and the value of +# /sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state +# +# Notes: In some cases several frequency values may be placed in the +# /tmp/result.X files. This is done on purpose in order to catch cases +# where the pstate driver may not be working at all. There is the case +# where, for example, several "similar" frequencies are in the file: +# +# +#/tmp/result.3100:1:cpu MHz : 2899.980 +#/tmp/result.3100:2:cpu MHz : 2900.000 +#/tmp/result.3100:3:msr 0x199: 0x1e00 +#/tmp/result.3100:4:max_perf_pct 94 +# +# and the test will error out in those cases. The result.X file can be checked +# for consistency and modified to remove the extra MHz values. The result.X +# files can be re-evaluated by setting EVALUATE_ONLY to 1 below. + +EVALUATE_ONLY=0 + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then + echo "$0 # Skipped: Test can only run on x86 architectures." + exit $ksft_skip +fi + +msg="skip all tests:" +if [ $UID != 0 ] && [ $EVALUATE_ONLY == 0 ]; then + echo $msg please run this as root >&2 + exit $ksft_skip +fi + +max_cpus=$(($(nproc)-1)) + +function run_test () { + + file_ext=$1 + for cpu in `seq 0 $max_cpus` + do + echo "launching aperf load on $cpu" + ./aperf $cpu & + done + + echo "sleeping for 5 seconds" + sleep 5 + grep MHz /proc/cpuinfo | sort -u > /tmp/result.freqs + num_freqs=$(wc -l /tmp/result.freqs | awk ' { print $1 } ') + if [ $num_freqs -ge 2 ]; then + tail -n 1 /tmp/result.freqs > /tmp/result.$1 + else + cp /tmp/result.freqs /tmp/result.$1 + fi + ./msr 0 >> /tmp/result.$1 + + max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct) + echo "max_perf_pct $max_perf_pct" >> /tmp/result.$1 + + for job in `jobs -p` + do + echo "waiting for job id $job" + wait $job + done +} + +# +# MAIN (ALL UNITS IN MHZ) +# + +# Get the marketing frequency +_mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}') +_mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:]) +mkt_freq=${_mkt_freq}0 + +# Get the ranges from cpupower +_min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ') +min_freq=$(($_min_freq / 1000)) +_max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ') +max_freq=$(($_max_freq / 1000)) + + +[ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq` +do + echo "Setting maximum frequency to $freq" + cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null + run_test $freq +done + +[ $EVALUATE_ONLY -eq 0 ] && cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null + +echo "========================================================================" +echo "The marketing frequency of the cpu is $mkt_freq MHz" +echo "The maximum frequency of the cpu is $max_freq MHz" +echo "The minimum frequency of the cpu is $min_freq MHz" + +# make a pretty table +echo "Target Actual Difference MSR(0x199) max_perf_pct" | tr " " "\n" > /tmp/result.tab +for freq in `seq $max_freq -100 $min_freq` +do + result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ') + msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ') + max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' ) + cat >> /tmp/result.tab << EOF +$freq +$result_freq +$((result_freq - freq)) +$msr +$((max_perf_pct * max_freq)) +EOF +done + +# print the table +pr -aTt -5 < /tmp/result.tab + +exit 0 |