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|
#!/bin/bash
# protect against multiple inclusion
if [ $FILE_CPUFREQ ]; then
return 0
else
FILE_CPUFREQ=DONE
fi
source cpu.sh
# GLOBALS
CPU_PATH="/sys/devices/system/cpu"
GLOBAL_CPUFREQ="/sys/devices/system/cpu/cpufreq"
# GENERIC HELPERS
# $1: cpu
cpu_has_cpufreq_directory()
{
if [ ! -d /sys/devices/system/cpu/$1/cpufreq ]; then
echo "Warning: No cpufreq directory present for $1"
fi
}
# READ CPUFREQ FILES
# $1: directory path
__read_cpufreq_files()
{
local filepath=$1
# Exit if cpu isn't mananged by cpufreq core
if [ ! -d $filepath ]; then
return;
fi
local files=`ls $filepath`
echo "Printing directory: $filepath"
echo ""
for file in $files; do
if [ -f $filepath/$file ]; then
echo "$file:"
cat $filepath/$file
else
echo ""
__read_cpufreq_files "$filepath/$file"
fi
done
echo ""
}
# $1: directory path
# $2: cpu
read_cpufreq_files_for_cpu()
{
local filepath=$CPU_PATH/$2/$1
__read_cpufreq_files $filepath
}
read_all_cpufreq_files()
{
echo "** Test: Running ${FUNCNAME[0]} **"
echo ""
__read_cpufreq_files $GLOBAL_CPUFREQ
echo ""
for_each_cpu read_cpufreq_files_for_cpu "cpufreq"
echo "------------------------------------------------"
echo ""
}
# UPDATE CPUFREQ FILES
# $1: directory path
__update_cpufreq_files()
{
local filepath=$1
# Exit if cpu isn't mananged by cpufreq core
if [ ! -d $filepath ]; then
return;
fi
local files=`ls $filepath`
echo "Updating directory: $filepath"
echo ""
for file in $files; do
if [ -f $filepath/$file ]; then
# file is writable ?
local wfile=$(ls -l $filepath/$file | awk '$1 ~ /^.*w.*/ { print $NF; }')
if [ ! -z $wfile ]; then
local val=$(cat $filepath/$file)
echo "Writing $val to: $file"
echo $val > $filepath/$file
fi
else
echo ""
__update_cpufreq_files "$filepath/$file"
fi
done
echo ""
}
# $1: directory path
# $2: cpu
update_cpufreq_files_for_cpu()
{
local filepath=$CPU_PATH/$2/$1
__update_cpufreq_files $filepath
}
# Update all writable files with their existing values
update_all_cpufreq_files()
{
echo "** Test: Running ${FUNCNAME[0]} **"
echo ""
__update_cpufreq_files $GLOBAL_CPUFREQ
echo ""
for_each_cpu update_cpufreq_files_for_cpu "cpufreq"
echo "------------------------------------------------"
echo ""
}
# CHANGE CPU FREQUENCIES
# $1: cpu
# $2: frequency
set_cpu_frequency()
{
echo $2 > $CPU_PATH/$1/cpufreq/scaling_setspeed
}
# $1: cpu
test_all_cpu_frequencies()
{
local filepath="$CPU_PATH/$1/cpufreq"
# Exit if cpu isn't mananged by cpufreq core
if [ ! -d $filepath ]; then
return;
fi
local found=$(switch_governor $1 "userspace")
if [ $found = 1 ]; then
echo "${FUNCNAME[0]}: userspace governor not available for: $1"
return;
else
echo "Switching governor for $1 to userspace"
fi
local freqs=$(cat $filepath/scaling_available_frequencies)
echo "Available frequencies for $1: $freqs"
# Set all frequencies one-by-one
for freq in $freqs; do
set_cpu_frequency $1 $freq
done
}
# $1: loop count
shuffle_frequency_for_all_cpus()
{
echo "** Test: Running ${FUNCNAME[0]} for $1 loops **"
echo ""
for i in `seq 1 $1`; do
for_each_cpu test_all_cpu_frequencies
done
echo "------------------------------------------------"
echo ""
}
# Calls the routine $1 passed to it and dumps all messages in:
# - script output: $2.txt
# - cpufreq messages: $2.cpufreq.txt
# - complete dmesg: $2.full.txt
call_routine()
{
# call routine
$1 > $2.txt
dmesg | grep cpufreq > $2.cpufreq.txt
# We may need the full logs as well
dmesg --read-clear > $2.full.txt
}
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