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 30 EVALUATE_ONLY=0 31 32 max_cpus=$(($(nproc)-1)) 33 34 # compile programs 35 gcc aperf.c -Wall -D_GNU_SOURCE -o aperf -lm 36 [ $? -ne 0 ] && echo "Problem compiling aperf.c." && exit 1 37 gcc -o msr msr.c -lm 38 [ $? -ne 0 ] && echo "Problem compiling msr.c." && exit 1 39 40 function 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 $_mkt_freq | tr -d [:alpha:][:punct:]) 76 mkt_freq=${_mkt_freq}0 77 78 # Get the ranges from cpupower 79 _min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ') 80 min_freq=$(($_min_freq / 1000)) 81 _max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ') 82 max_freq=$(($_max_freq / 1000)) 83 84 85 for freq in `seq $max_freq -100 $min_freq` 86 do 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 90 done 91 92 echo "==============================================================================" 93 94 echo "The marketing frequency of the cpu is $mkt_freq MHz" 95 echo "The maximum frequency of the cpu is $max_freq MHz" 96 echo "The minimum frequency of the cpu is $min_freq MHz" 97 98 cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null 99 100 # make a pretty table 101 echo "Target Actual Difference MSR(0x199) max_perf_pct" 102 for freq in `seq $max_freq -100 $min_freq` 103 do 104 result_freq=$(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 112 done 113 exit 0 114
