cpu-usage: On Windows, exclude "System Idle Process" from the Top3 list

CHANGELOG.md

@@ -58,6 +58,7 @@ Monitoring Plugins:
 
 * All plugins: Consistently reporting errors using cu() instead of oao()
 * about-me: Show systemd timers with next runtime
+* cpu-usage: On Windows, exclude "System Idle Process" from the Top3 list
 * disk-smart: Skip unsupported disks (fix #672)
 * fail2ban: Improve output, add unit-test
 * grafana-version: Add Grafana v9.5

check-plugins/cpu-usage/cpu-usage

@@ -29,7 +29,7 @@ except ImportError:
 
 
 __author__ = 'Linuxfabrik GmbH, Zurich/Switzerland'
-__version__ = '2023071301'
+__version__ = '2023092101'
 
 DESCRIPTION = """Mainly provides utilization percentages for each specific CPU time. Takes a time
                 period into account: the cpu usage within a certain amount of time has to be equal
@@ -217,12 +217,18 @@ def main():
     if lib.version.version(psutil.__version__) >= lib.version.version('5.3.0'):
         try:
             for p in psutil.process_iter(attrs=['name', 'cpu_times']):
+                if lib.base.WINDOWS and p.info['name'] == 'System Idle Process':
+                    # yes, the System Idle Process on Windows consumes CPU time
+                    continue
                 cnt[p.info['name']] += sum(p.info['cpu_times'][:2])
         except psutil.NoSuchProcess:
             pass
     else:
         try:
             for p in [x.as_dict(attrs=['name', 'cpu_times']) for x in psutil.process_iter()]:
+                if lib.base.WINDOWS and p['name'] == 'System Idle Process':
+                    # yes, the System Idle Process on Windows consumes CPU time
+                    continue
                 cnt[p['name']] += sum(p['cpu_times'][:2])
         except psutil.NoSuchProcess:
             pass