[python-win32] win32pdhutil Processor Time always returns 99

[Martin Richard]

I found a solution by searching the archives.  Here some code cut out of some other performance collecting code I put together.

Rick

import os
import time
import win32pdh
import win32pdhquery
import win32pdhutil

class HostCPU:
    # 
    def __init__(self):
        path = win32pdh.MakeCounterPath((None,"Processor","_Total",
                                         None, -1, "% Processor Time"))
        self.base = win32pdh.OpenQuery()
        self.counter = win32pdh.AddCounter(self.base, path)
        self.reset()
    #
    def reset(self):
        ''' Need to do this to initialize first data point.  The win32
        internals will calculate the CPU usage that occurs between a reset
        and getUsage or between successive getUsage calls.
        '''
        win32pdh.CollectQueryData(self.base)
    #
    def getUsage(self):
        ''' see HostCPU.reset.__doc_ '''
        win32pdh.CollectQueryData(self.base)
        # Get the formatted value of the counter
        return win32pdh.GetFormattedCounterValue(self.counter,
                                                 win32pdh.PDH_FMT_LONG)[1]



-----Original Message-----
From: Martin Beckett [mailto:martin at datactics.co.uk]
Sent: Friday, December 12, 2003 11:24 AM
To: python-win32 at python.org
Subject: [python-win32] win32pdhutil Processor Time always returns 99


I am trying to get the % CPU load in python on win32

win32pdhutil.GetPerformanceAttributes("Processor(_Total)","% Processor 
Time")
only ever returns 99 whatever the machine load ?

Running on Windows XP-pro + ActivePython 2.3.2 Build 231

   Any ideas ?


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