134 lines · bash
1#!/bin/bash2# SPDX-License-Identifier: GPL-2.03#4# This test runs on Intel x86 based hardware which support the intel_pstate5# driver. The test checks the frequency settings from the maximum turbo6# state to the minimum supported frequency, in decrements of 100MHz. The7# test runs the aperf.c program to put load on each processor.8#9# The results are displayed in a table which indicate the "Target" state,10# or the requested frequency in MHz, the Actual frequency, as read from11# /proc/cpuinfo, the difference between the Target and Actual frequencies,12# and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what13# pstate the cpu is in, and the value of14# /sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state15#16# Notes: In some cases several frequency values may be placed in the17# /tmp/result.X files. This is done on purpose in order to catch cases18# where the pstate driver may not be working at all. There is the case19# where, for example, several "similar" frequencies are in the file:20#21#22#/tmp/result.3100:1:cpu MHz : 2899.98023#/tmp/result.3100:2:cpu MHz : 2900.00024#/tmp/result.3100:3:msr 0x199: 0x1e0025#/tmp/result.3100:4:max_perf_pct 9426#27# and the test will error out in those cases. The result.X file can be checked28# for consistency and modified to remove the extra MHz values. The result.X29# files can be re-evaluated by setting EVALUATE_ONLY to 1 below.30 31EVALUATE_ONLY=032 33# Kselftest framework requirement - SKIP code is 4.34ksft_skip=435 36if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then37 echo "$0 # Skipped: Test can only run on x86 architectures."38 exit $ksft_skip39fi40 41msg="skip all tests:"42if [ $UID != 0 ] && [ $EVALUATE_ONLY == 0 ]; then43 echo $msg please run this as root >&244 exit $ksft_skip45fi46 47if ! command -v cpupower &> /dev/null; then48 echo $msg cpupower could not be found, please install it >&249 exit $ksft_skip50fi51 52max_cpus=$(($(nproc)-1))53 54function run_test () {55 56 file_ext=$157 for cpu in `seq 0 $max_cpus`58 do59 echo "launching aperf load on $cpu"60 ./aperf $cpu &61 done62 63 echo "sleeping for 5 seconds"64 sleep 565 grep MHz /proc/cpuinfo | sort -u > /tmp/result.freqs66 num_freqs=$(wc -l /tmp/result.freqs | awk ' { print $1 } ')67 if [ $num_freqs -ge 2 ]; then68 tail -n 1 /tmp/result.freqs > /tmp/result.$169 else70 cp /tmp/result.freqs /tmp/result.$171 fi72 ./msr 0 >> /tmp/result.$173 74 max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct)75 echo "max_perf_pct $max_perf_pct" >> /tmp/result.$176 77 for job in `jobs -p`78 do79 echo "waiting for job id $job"80 wait $job81 done82}83 84#85# MAIN (ALL UNITS IN MHZ)86#87 88# Get the marketing frequency89_mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}')90_mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:])91mkt_freq=${_mkt_freq}092 93# Get the ranges from cpupower94_min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ')95min_freq=$((_min_freq / 1000))96_max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ')97max_freq=$((_max_freq / 1000))98 99 100[ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq`101do102 echo "Setting maximum frequency to $freq"103 cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null104 run_test $freq105done106 107[ $EVALUATE_ONLY -eq 0 ] && cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null108 109echo "========================================================================"110echo "The marketing frequency of the cpu is $mkt_freq MHz"111echo "The maximum frequency of the cpu is $max_freq MHz"112echo "The minimum frequency of the cpu is $min_freq MHz"113 114# make a pretty table115echo "Target Actual Difference MSR(0x199) max_perf_pct" | tr " " "\n" > /tmp/result.tab116for freq in `seq $max_freq -100 $min_freq`117do118 result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ')119 msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')120 max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )121 cat >> /tmp/result.tab << EOF122$freq123$result_freq124$((result_freq - freq))125$msr126$((max_perf_pct * max_freq))127EOF128done129 130# print the table131pr -aTt -5 < /tmp/result.tab132 133exit 0134