LXR linux/tools/power/cpupower/bench/cpufreq-bench

   1#!/bin/bash
   2# SPDX-License-Identifier: GPL-2.0-or-later
   3
   4
   5# Author/Copyright(c): 2009, Thomas Renninger <trenn@suse.de>, Novell Inc.
   6
   7# Ondemand up_threshold and sampling rate test script for cpufreq-bench
   8# mircobenchmark.
   9# Modify the general variables at the top or extend or copy out parts
  10# if you want to test other things
  11#
  12
  13# Default with latest kernels is 95, before micro account patches
  14# it was 80, cmp. with git commit 808009131046b62ac434dbc796
  15UP_THRESHOLD="60 80 95"
  16# Depending on the kernel and the HW sampling rate could be restricted
  17# and cannot be set that low...
  18# E.g. before git commit cef9615a853ebc4972084f7 one could only set
  19# min sampling rate of 80000 if CONFIG_HZ=250
  20SAMPLING_RATE="20000 80000"
  21
  22function measure()
  23{
  24    local -i up_threshold_set
  25    local -i sampling_rate_set
  26
  27    for up_threshold in $UP_THRESHOLD;do
  28        for sampling_rate in $SAMPLING_RATE;do
  29            # Set values in sysfs
  30            echo $up_threshold >/sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold
  31            echo $sampling_rate >/sys/devices/system/cpu/cpu0/cpufreq/ondemand/sampling_rate
  32            up_threshold_set=$(cat /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold)
  33            sampling_rate_set=$(cat /sys/devices/system/cpu/cpu0/cpufreq/ondemand/sampling_rate)
  34
  35            # Verify set values in sysfs
  36            if [ ${up_threshold_set} -eq ${up_threshold} ];then
  37                echo "up_threshold: $up_threshold, set in sysfs: ${up_threshold_set}"
  38            else
  39                echo "WARNING: Tried to set up_threshold: $up_threshold, set in sysfs: ${up_threshold_set}"
  40            fi
  41            if [ ${sampling_rate_set} -eq ${sampling_rate} ];then
  42                echo "sampling_rate: $sampling_rate, set in sysfs: ${sampling_rate_set}"
  43            else
  44                echo "WARNING: Tried to set sampling_rate: $sampling_rate, set in sysfs: ${sampling_rate_set}"
  45            fi
  46
  47            # Benchmark
  48            cpufreq-bench -o /var/log/cpufreq-bench/up_threshold_${up_threshold}_sampling_rate_${sampling_rate}
  49        done
  50    done
  51}
  52
  53function create_plots()
  54{
  55    local command
  56
  57    for up_threshold in $UP_THRESHOLD;do
  58        command="cpufreq-bench_plot.sh -o \"sampling_rate_${SAMPLING_RATE}_up_threshold_${up_threshold}\" -t \"Ondemand sampling_rate: ${SAMPLING_RATE} comparison - Up_threshold: $up_threshold %\""
  59        for sampling_rate in $SAMPLING_RATE;do
  60            command="${command} /var/log/cpufreq-bench/up_threshold_${up_threshold}_sampling_rate_${sampling_rate}/* \"sampling_rate = $sampling_rate\""
  61        done
  62        echo $command
  63        eval "$command"
  64        echo
  65    done
  66
  67    for sampling_rate in $SAMPLING_RATE;do
  68        command="cpufreq-bench_plot.sh -o \"up_threshold_${UP_THRESHOLD}_sampling_rate_${sampling_rate}\" -t \"Ondemand up_threshold: ${UP_THRESHOLD} % comparison - sampling_rate: $sampling_rate\""
  69        for up_threshold in $UP_THRESHOLD;do
  70            command="${command} /var/log/cpufreq-bench/up_threshold_${up_threshold}_sampling_rate_${sampling_rate}/* \"up_threshold = $up_threshold\""
  71        done
  72        echo $command
  73        eval "$command"
  74        echo
  75    done
  76
  77    command="cpufreq-bench_plot.sh -o \"up_threshold_${UP_THRESHOLD}_sampling_rate_${SAMPLING_RATE}\" -t \"Ondemand up_threshold: ${UP_THRESHOLD} and sampling_rate ${SAMPLING_RATE} comparison\""
  78    for sampling_rate in $SAMPLING_RATE;do
  79        for up_threshold in $UP_THRESHOLD;do
  80            command="${command} /var/log/cpufreq-bench/up_threshold_${up_threshold}_sampling_rate_${sampling_rate}/* \"up_threshold = $up_threshold - sampling_rate = $sampling_rate\""
  81        done
  82    done
  83    echo "$command"
  84    eval "$command"
  85}
  86
  87measure
  88create_plots
  89