tools/testing/selftests/intel_pstate/run.sh

   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 if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then
  33         echo "$0 # Skipped: Test can only run on x86 architectures."
  34         exit 0
  35 fi
  36
  37 max_cpus=$(($(nproc)-1))
  38
  39 function run_test () {
  40
  41         file_ext=$1
  42         for cpu in `seq 0 $max_cpus`
  43         do
  44                 echo "launching aperf load on $cpu"
  45                 ./aperf $cpu &
  46         done
  47
  48         echo "sleeping for 5 seconds"
  49         sleep 5
  50         num_freqs=$(cat /proc/cpuinfo | grep MHz | sort -u | wc -l)
  51         if [ $num_freqs -le 2 ]; then
  52                 cat /proc/cpuinfo | grep MHz | sort -u | tail -1 > /tmp/result.$1
  53         else
  54                 cat /proc/cpuinfo | grep MHz | sort -u > /tmp/result.$1
  55         fi
  56         ./msr 0 >> /tmp/result.$1
  57
  58         max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct)
  59         echo "max_perf_pct $max_perf_pct" >> /tmp/result.$1
  60
  61         for job in `jobs -p`
  62         do
  63                 echo "waiting for job id $job"
  64                 wait $job
  65         done
  66 }
  67
  68 #
  69 # MAIN (ALL UNITS IN MHZ)
  70 #
  71
  72 # Get the marketing frequency
  73 _mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}')
  74 _mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:])
  75 mkt_freq=${_mkt_freq}0
  76
  77 # Get the ranges from cpupower
  78 _min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ')
  79 min_freq=$(($_min_freq / 1000))
  80 _max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ')
  81 max_freq=$(($_max_freq / 1000))
  82
  83
  84 for freq in `seq $max_freq -100 $min_freq`
  85 do
  86         echo "Setting maximum frequency to $freq"
  87         cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null
  88         [ $EVALUATE_ONLY -eq 0 ] && run_test $freq
  89 done
  90
  91 echo "=============================================================================="
  92
  93 echo "The marketing frequency of the cpu is $mkt_freq MHz"
  94 echo "The maximum frequency of the cpu is $max_freq MHz"
  95 echo "The minimum frequency of the cpu is $min_freq MHz"
  96
  97 cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null
  98
  99 # make a pretty table
 100 echo "Target      Actual      Difference     MSR(0x199)     max_perf_pct"
 101 for freq in `seq $max_freq -100 $min_freq`
 102 do
 103         result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ')
 104         msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')
 105         max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )
 106         if [ $result_freq -eq $freq ]; then
 107                 echo " $freq        $result_freq             0          $msr         $(($max_perf_pct*3300))"
 108         else
 109                 echo " $freq        $result_freq          $(($result_freq-$freq))          $msr          $(($max_perf_pct*$max_freq))"
 110         fi
 111 done
 112 exit 0