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#!/bin/sh
# if this chart is called X.chart.sh, then all functions and global variables
# must start with X_
cpufreq_sys_dir="/sys/devices"
cpufreq_sys_depth=10
cpufreq_source_update=1
# _update_every is a special variable - it holds the number of seconds
# between the calls of the _update() function
cpufreq_update_every=
cpufreq_priority=10000
cpufreq_find_all_files() {
find $1 -maxdepth $cpufreq_sys_depth -name scaling_cur_freq 2>/dev/null
}
# _check is called once, to find out if this chart should be enabled or not
cpufreq_check() {
# this should return:
# - 0 to enable the chart
# - 1 to disable the chart
[ -z "$( cpufreq_find_all_files $cpufreq_sys_dir )" ] && return 1
return 0
}
# _create is called once, to create the charts
cpufreq_create() {
local dir= file= id= i=
# we create a script with the source of the
# cpufreq_update() function
# - the highest speed we can achieve -
[ $cpufreq_source_update -eq 1 ] && echo >$TMP_DIR/cpufreq.sh "cpufreq_update() {"
echo "CHART cpu.cpufreq '' 'CPU Clock' 'MHz' 'cpufreq' '' line $[cpufreq_priority + 1] $cpufreq_update_every"
echo >>$TMP_DIR/cpufreq.sh "echo \"BEGIN cpu.cpufreq \$1\""
i=0
for file in $( cpufreq_find_all_files $cpufreq_sys_dir | sort -u )
do
i=$(( i + 1 ))
dir=$( dirname $file )
cpu=
[ -f $dir/affected_cpus ] && cpu=$( cat $dir/affected_cpus )
[ -z "$cpu" ] && cpu="$i.a"
id="$( fixid "cpu$cpu" )"
echo >&2 "charts.d: cpufreq: on file='$file', dir='$dir', cpu='$cpu', id='$id'"
echo "DIMENSION $id '$id' absolute 1 1000"
echo >>$TMP_DIR/cpufreq.sh "printf \"SET $id = \"; cat $file "
done
echo >>$TMP_DIR/cpufreq.sh "echo END"
[ $cpufreq_source_update -eq 1 ] && echo >>$TMP_DIR/cpufreq.sh "}"
# cat >&2 $TMP_DIR/cpufreq.sh
# ok, load the function cpufreq_update() we created
[ $cpufreq_source_update -eq 1 ] && . $TMP_DIR/cpufreq.sh
return 0
}
# _update is called continiously, to collect the values
cpufreq_update() {
# the first argument to this function is the microseconds since last update
# pass this parameter to the BEGIN statement (see bellow).
# do all the work to collect / calculate the values
# for each dimension
# remember: KEEP IT SIMPLE AND SHORT
[ $cpufreq_source_update -eq 0 ] && . $TMP_DIR/cpufreq.sh $1
return 0
}
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