diff --git a/src/pcp/pidstat/pcp-pidstat.py b/src/pcp/pidstat/pcp-pidstat.py
index 0aa0062b1..4f3bf494d 100644
--- a/src/pcp/pidstat/pcp-pidstat.py
+++ b/src/pcp/pidstat/pcp-pidstat.py
@@ -131,7 +131,7 @@ def system_percent(self):
 
     def total_percent(self):
         if self.user_percent() is not None and self.guest_percent() is not None and self.system_percent() is not None:
-            return self.user_percent()+self.guest_percent()+self.system_percent()
+            return float("%.2f"%(self.user_percent()+self.guest_percent()+self.system_percent()))
         else:
             return None
 
@@ -460,20 +460,27 @@ def extraOptions(self, opt,optarg, index):
         elif opt == 'U':
             PidstatOptions.show_process_user = True
             PidstatOptions.filtered_process_user = optarg
-        elif opt == 'P':
+        elif opt == 'p':
             if optarg == "ALL" or optarg == "SELF":
                 PidstatOptions.pid_filter = optarg
             else:
                 PidstatOptions.pid_filter = "ALL"
                 try:
-                    PidstatOptions.pid_list = map(lambda x:int(x),optarg.split(','))
+                    PidstatOptions.pid_list = list(map(lambda x:int(x),optarg.split(',')))
                 except ValueError as e:
                     print ("Invalid Process Id List: use comma separated pids without whitespaces")
                     sys.exit(1)
 
+    def override(self, opt):
+        """ Override standard PCP options to match pidstat(1) """
+        if (opt == 'p'):
+            return 1
+        return 0
+
     def __init__(self):
-        pmapi.pmOptions.__init__(self,"a:s:t:G:IU::P:RrkV?")
+        pmapi.pmOptions.__init__(self,"a:s:t:G:IU::p:RrkV?")
         self.pmSetOptionCallback(self.extraOptions)
+        self.pmSetOverrideCallback(self.override)
         self.pmSetLongOptionHeader("General options")
         self.pmSetLongOptionArchive()
         self.pmSetLongOptionSamples()
@@ -481,7 +488,7 @@ def __init__(self):
         self.pmSetLongOption("process-name",1,"G","NAME","Select process names using regular expression.")
         self.pmSetLongOption("",0,"I","","In SMP environment, show CPU usage per processor.")
         self.pmSetLongOption("user-name",2,"U","[USERNAME]","Show real user name of the tasks and optionally filter by user name.")
-        self.pmSetLongOption("pid-list",1,"P","PID1,PID2..  ","Show stats for specified pids, Use SELF for current process and ALL for all processes.")
+        self.pmSetLongOption("pid-list",1,"p","PID1,PID2..  ","Show stats for specified pids, Use SELF for current process and ALL for all processes.")
         self.pmSetLongOption("",0,"R","","Report realtime priority and scheduling policy information.")
         self.pmSetLongOption("",0,"r","","Report page faults and memory utilization.")
         self.pmSetLongOption("",0,"k","","Report stack utilization.")