[SET_CPU_AFFINITY] IrqBalanceMgr uses service to check the status

scripts/set_cpu_affinity

@@ -357,8 +357,12 @@ class IrqBalanceMgr:
 
     @classmethod
     def getActive(klass):
-        cmd = ['bash', '-c', 'ps -ef | grep -v grep | grep irqbalance']
-        return SystemCmd(cmd).execute() == 0
+        cmd = SystemCmd(['service', 'irqbalance', 'status'])
+        service = cmd.doPopen(stdout=PIPE, text=True)
+        for l in service.stdout:
+            if l.strip().startswith('Active'):
+                return 'running' in l
+        raise RuntimeError('Could not check irqbalance service')
 
     @classmethod
     def setActive(klass, active):