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# shellcheck shell=bash
# no need for shebang - this file is loaded from charts.d.plugin
# SPDX-License-Identifier: GPL-3.0-or-later
# netdata
# real-time performance and health monitoring, done right!
# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
#
# if this chart is called X.chart.sh, then all functions and global variables
# must start with X_
cpufreq_sys_dir="${NETDATA_HOST_PREFIX}/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")"
debug "file='$file', dir='$dir', cpu='$cpu', id='$id'"
echo "DIMENSION $id '$id' absolute 1 1000"
echo >>"$TMP_DIR/cpufreq.sh" "echo \"SET $id = \"\$(< $file )"
done
echo >>"$TMP_DIR/cpufreq.sh" "echo END"
[ $cpufreq_source_update -eq 1 ] && echo >>"$TMP_DIR/cpufreq.sh" "}"
# ok, load the function cpufreq_update() we created
# shellcheck disable=SC1090
[ $cpufreq_source_update -eq 1 ] && . "$TMP_DIR/cpufreq.sh"
return 0
}
# _update is called continuously, 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
# shellcheck disable=SC1090
[ $cpufreq_source_update -eq 0 ] && . "$TMP_DIR/cpufreq.sh" "$1"
return 0
}
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