mirror of
https://github.com/netdata/netdata.git
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90 lines
2.5 KiB
Bash
90 lines
2.5 KiB
Bash
# shellcheck shell=bash
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# no need for shebang - this file is loaded from charts.d.plugin
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# SPDX-License-Identifier: GPL-3.0-or-later
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# netdata
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# real-time performance and health monitoring, done right!
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# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
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#
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# if this chart is called X.chart.sh, then all functions and global variables
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# must start with X_
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cpufreq_sys_dir="${NETDATA_HOST_PREFIX}/sys/devices"
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cpufreq_sys_depth=10
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cpufreq_source_update=1
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# _update_every is a special variable - it holds the number of seconds
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# between the calls of the _update() function
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cpufreq_update_every=
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cpufreq_priority=10000
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cpufreq_find_all_files() {
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find "$1" -maxdepth $cpufreq_sys_depth -name scaling_cur_freq 2>/dev/null
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}
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# _check is called once, to find out if this chart should be enabled or not
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cpufreq_check() {
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# this should return:
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# - 0 to enable the chart
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# - 1 to disable the chart
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[ -z "$( cpufreq_find_all_files "$cpufreq_sys_dir" )" ] && return 1
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return 0
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}
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# _create is called once, to create the charts
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cpufreq_create() {
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local dir file id i
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# we create a script with the source of the
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# cpufreq_update() function
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# - the highest speed we can achieve -
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[ $cpufreq_source_update -eq 1 ] && echo >"$TMP_DIR/cpufreq.sh" "cpufreq_update() {"
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echo "CHART cpu.cpufreq '' 'CPU Clock' 'MHz' 'cpufreq' '' line $((cpufreq_priority + 1)) $cpufreq_update_every"
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echo >>"$TMP_DIR/cpufreq.sh" "echo \"BEGIN cpu.cpufreq \$1\""
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i=0
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for file in $( cpufreq_find_all_files "$cpufreq_sys_dir" | sort -u )
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do
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i=$(( i + 1 ))
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dir=$( dirname "$file" )
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cpu=
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[ -f "$dir/affected_cpus" ] && cpu=$( cat "$dir/affected_cpus" )
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[ -z "$cpu" ] && cpu="$i.a"
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id="$( fixid "cpu$cpu" )"
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debug "file='$file', dir='$dir', cpu='$cpu', id='$id'"
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echo "DIMENSION $id '$id' absolute 1 1000"
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echo >>"$TMP_DIR/cpufreq.sh" "echo \"SET $id = \"\$(< $file )"
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done
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echo >>"$TMP_DIR/cpufreq.sh" "echo END"
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[ $cpufreq_source_update -eq 1 ] && echo >>"$TMP_DIR/cpufreq.sh" "}"
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# ok, load the function cpufreq_update() we created
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# shellcheck disable=SC1090
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[ $cpufreq_source_update -eq 1 ] && . "$TMP_DIR/cpufreq.sh"
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return 0
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}
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# _update is called continuously, to collect the values
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cpufreq_update() {
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# the first argument to this function is the microseconds since last update
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# pass this parameter to the BEGIN statement (see bellow).
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# do all the work to collect / calculate the values
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# for each dimension
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# remember: KEEP IT SIMPLE AND SHORT
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# shellcheck disable=SC1090
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[ $cpufreq_source_update -eq 0 ] && . "$TMP_DIR/cpufreq.sh" "$1"
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return 0
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}
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