cpu

modules/cpu.sh

@@ -0,0 +1,76 @@
+#!/bin/sh
+
+name='CPU Load'
+recommend=1
+available=1
+
+cpu_count=
+set +e # Disable exit on error for this section
+
+
+# BSD / macOS
+if [ -z "$cpu_count" ]; then
+    cpu_count=$(sysctl -n hw.ncpu 2>/dev/null)
+fi
+
+# Linux: /proc/cpuinfo
+if [ -z "$cpu_count" ]; then
+    if [ -r /proc/cpuinfo ]; then
+        cpu_count=$(awk '/^processor[[:space:]]*:/ {n++} END{print n}' /proc/cpuinfo 2>/dev/null)
+    fi
+fi
+
+# Solaris
+if [ -z "$cpu_count" ]; then
+    cpu_count=$(psrinfo -p 2>/dev/null)
+fi
+
+# AIX
+if [ -z "$cpu_count" ]; then
+    cpu_count=$(lsdev -Cc processor 2>/dev/null | wc -l | awk '{print $1}')
+fi
+
+# HP-UX
+if [ -z "$cpu_count" ]; then
+    cpu_count=$(ioscan -kC processor 2>/dev/null | grep processor | wc -l | awk '{print $1}')
+fi
+
+
+set -e  # Re-enable exit on error
+
+if [ -z "$cpu_count" ] || [ "$cpu_count" -lt 1 ] 2>/dev/null; then
+    # could not determine cpu count.
+    available=0
+fi
+
+
+check() {
+    # Extract last three numeric fields; remove commas.
+    set -- $(uptime | awk '
+    {
+        for (i = NF - 2; i <= NF; i++) {
+            gsub(",", "", $i);
+            printf "%s ", $i;
+        }
+    }
+    ')
+
+    load1="$1"
+    load5="$2"
+    load15="$3"
+
+    warn1=$(awk -v l="$load1" -v c="$cpu_count" 'BEGIN { print (l >= c) ? 1 : 0 }')
+    warn5=$(awk -v l="$load5" -v c="$cpu_count" 'BEGIN { print (l >= c) ? 1 : 0 }')
+
+    if [ "$warn1" -eq 1 ] 2>/dev/null; then
+        warn "load_1m" "$load1" "High 1-minute load average: $load1 (>= $cpu_count CPUs)"
+    else
+        ok "load_1m" "$load1" "1-minute load average is normal: $load1 (< $cpu_count CPUs)"
+    fi
+
+    if [ "$warn5" -eq 1 ] 2>/dev/null; then
+        warn "load_1m" "$load5" "High 5-minute load average: $load5 (>= $cpu_count CPUs)"
+    else
+        ok "load_1m" "$load5" "5-minute load average is normal: $load5 (< $cpu_count CPUs)"
+    fi
+}