1#!/bin/bash 2# 3# This test runs on Intel x86 based hardware which support the intel_pstate 4# driver. The test checks the frequency settings from the maximum turbo 5# state to the minimum supported frequency, in decrements of 100MHz. The 6# test runs the aperf.c program to put load on each processor. 7# 8# The results are displayed in a table which indicate the "Target" state, 9# or the requested frequency in MHz, the Actual frequency, as read from 10# /proc/cpuinfo, the difference between the Target and Actual frequencies, 11# and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what 12# pstate the cpu is in, and the value of 13# /sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state 14# 15# Notes: In some cases several frequency values may be placed in the 16# /tmp/result.X files. This is done on purpose in order to catch cases 17# where the pstate driver may not be working at all. There is the case 18# where, for example, several "similar" frequencies are in the file: 19# 20# 21#/tmp/result.3100:1:cpu MHz : 2899.980 22#/tmp/result.3100:2:cpu MHz : 2900.000 23#/tmp/result.3100:3:msr 0x199: 0x1e00 24#/tmp/result.3100:4:max_perf_pct 94 25# 26# and the test will error out in those cases. The result.X file can be checked 27# for consistency and modified to remove the extra MHz values. The result.X 28# files can be re-evaluated by setting EVALUATE_ONLY to 1 below. 29 30EVALUATE_ONLY=0 31 32max_cpus=$(($(nproc)-1)) 33 34# compile programs 35gcc aperf.c -Wall -D_GNU_SOURCE -o aperf -lm 36[ $? -ne 0 ] && echo "Problem compiling aperf.c." && exit 1 37gcc -o msr msr.c -lm 38[ $? -ne 0 ] && echo "Problem compiling msr.c." && exit 1 39 40function run_test () { 41 42 file_ext=$1 43 for cpu in `seq 0 $max_cpus` 44 do 45 echo "launching aperf load on $cpu" 46 ./aperf $cpu & 47 done 48 49 echo "sleeping for 5 seconds" 50 sleep 5 51 num_freqs=$(cat /proc/cpuinfo | grep MHz | sort -u | wc -l) 52 if [ $num_freqs -le 2 ]; then 53 cat /proc/cpuinfo | grep MHz | sort -u | tail -1 > /tmp/result.$1 54 else 55 cat /proc/cpuinfo | grep MHz | sort -u > /tmp/result.$1 56 fi 57 ./msr 0 >> /tmp/result.$1 58 59 max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct) 60 echo "max_perf_pct $max_perf_pct" >> /tmp/result.$1 61 62 for job in `jobs -p` 63 do 64 echo "waiting for job id $job" 65 wait $job 66 done 67} 68 69# 70# MAIN (ALL UNITS IN MHZ) 71# 72 73# Get the marketing frequency 74_mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}') 75_mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:]) 76mkt_freq=${_mkt_freq}0 77 78# Get the ranges from cpupower 79_min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ') 80min_freq=$(($_min_freq / 1000)) 81_max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ') 82max_freq=$(($_max_freq / 1000)) 83 84 85for freq in `seq $max_freq -100 $min_freq` 86do 87 echo "Setting maximum frequency to $freq" 88 cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null 89 [ $EVALUATE_ONLY -eq 0 ] && run_test $freq 90done 91 92echo "==============================================================================" 93 94echo "The marketing frequency of the cpu is $mkt_freq MHz" 95echo "The maximum frequency of the cpu is $max_freq MHz" 96echo "The minimum frequency of the cpu is $min_freq MHz" 97 98cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null 99 100# make a pretty table 101echo "Target Actual Difference MSR(0x199) max_perf_pct" 102for freq in `seq $max_freq -100 $min_freq` 103do 104 result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ') 105 msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ') 106 max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' ) 107 if [ $result_freq -eq $freq ]; then 108 echo " $freq $result_freq 0 $msr $(($max_perf_pct*3300))" 109 else 110 echo " $freq $result_freq $(($result_freq-$freq)) $msr $(($max_perf_pct*$max_freq))" 111 fi 112done 113exit 0 114