mirror of
https://github.com/munin-monitoring/muninlite.git
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dc242d3631
Previously only CPU entries with a single digit (0..9) were parsed.
The improved regular expression simplifies the calculation of the CPU
count, since the combined entry ("cpu" without digits) is skipped.
84 lines
3 KiB
Text
84 lines
3 KiB
Text
config_cpu() {
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extinfo=""
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if grep '^cpu \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\}' /proc/stat >/dev/null 2>&1; then
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extinfo="iowait irq softirq"
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fi
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# shellcheck disable=SC2126
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NCPU=$(grep '^cpu[0-9]\+ ' /proc/stat | wc -l)
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PERCENT=$(($NCPU * 100))
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graphlimit=$PERCENT
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SYSWARNING=$(($PERCENT * 30 / 100))
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SYSCRITICAL=$(($PERCENT * 50 / 100))
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USRWARNING=$(($PERCENT * 80 / 100))
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echo "graph_title CPU usage"
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echo "graph_order system user nice idle $extinfo" | sed 's/ $//'
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echo "graph_args --base 1000 -r --lower-limit 0 --upper-limit $graphlimit"
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echo "graph_vlabel %"
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echo "graph_scale no"
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echo "graph_info This graph shows how CPU time is spent."
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echo "graph_category system"
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echo "graph_period second"
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echo "system.label system"
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echo "system.draw AREA"
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echo "system.max 5000"
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echo "system.min 0"
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echo "system.type DERIVE"
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echo "system.warning $SYSWARNING"
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echo "system.critical $SYSCRITICAL"
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echo "system.info CPU time spent by the kernel in system activities"
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echo "user.label user"
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echo "user.draw STACK"
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echo "user.min 0"
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echo "user.max 5000"
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echo "user.warning $USRWARNING"
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echo "user.type DERIVE"
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echo "user.info CPU time spent by normal programs and daemons"
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echo "nice.label nice"
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echo "nice.draw STACK"
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echo "nice.min 0"
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echo "nice.max 5000"
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echo "nice.type DERIVE"
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echo "nice.info CPU time spent by nice(1)d programs"
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echo "idle.label idle"
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echo "idle.draw STACK"
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echo "idle.min 0"
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echo "idle.max 5000"
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echo "idle.type DERIVE"
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echo "idle.info Idle CPU time"
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if [ ! -z "$extinfo" ]; then
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echo "iowait.label iowait"
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echo "iowait.draw STACK"
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echo "iowait.min 0"
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echo "iowait.max 5000"
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echo "iowait.type DERIVE"
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echo "iowait.info CPU time spent waiting for I/O operations to finish"
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echo "irq.label irq"
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echo "irq.draw STACK"
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echo "irq.min 0"
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echo "irq.max 5000"
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echo "irq.type DERIVE"
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echo "irq.info CPU time spent handling interrupts"
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echo "softirq.label softirq"
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echo "softirq.draw STACK"
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echo "softirq.min 0"
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echo "softirq.max 5000"
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echo "softirq.type DERIVE"
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echo "softirq.info CPU time spent handling 'batched' interrupts"
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fi
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}
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fetch_cpu() {
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extinfo=""
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if grep '^cpu \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\} \{1,\}[0-9]\{1,\}' /proc/stat >/dev/null 2>&1; then
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extinfo="iowait irq softirq"
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fi
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CINFO=$(grep '^cpu ' /proc/stat | cut -c6-)
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echo "user.value" "$(echo "$CINFO" | cut -d " " -f 1)"
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echo "nice.value" "$(echo "$CINFO" | cut -d " " -f 2)"
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echo "system.value" "$(echo "$CINFO" | cut -d " " -f 3)"
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echo "idle.value" "$(echo "$CINFO" | cut -d " " -f 4)"
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if [ -n "$extinfo" ]; then
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echo "iowait.value" "$(echo "$CINFO" | cut -d " " -f 5)"
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echo "irq.value" "$(echo "$CINFO" | cut -d " " -f 6)"
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echo "softirq.value" "$(echo "$CINFO" | cut -d " " -f 7)"
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fi
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}
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