Trying to find a simple way of getting a Process current CPU Usage

[dittytwo]

Hi all
I have been looking around the web
and can't seem to find a solution the solution that i have found and manipulated seems to bring back the whole list of currently running process's which hogs a lot of CPU time in its self..

basic idea of my program is i have multiple threads doing things and i have a thread that gathers data within this thread i can currently get all sorts of information using

b=str(gatherIt("firefox","Working Set"))
 
def gatherIt(whoIt,whatIt):
    #this is the data gathering function thing
    data = win32pdhutil.FindPerformanceAttributesByName(whoIt, counter=whatIt)
    return data
 

this then runs every 10 seconds and out puts the information along with a load of other data into a CSV file.
what i can't seem to do is get the cpu usage of a process.
the process i have found is this

import time
import wmi,win32api,win32process
 
 
c = wmi.WMI ()
d=win32process.GetProcessTimes(1)
print d
process_info = {}
while True:
  for process in c.Win32_Process ():
    if process.Caption == 'firefox.exe':
      id = process.ProcessID
      for p in c.Win32_PerfRawData_PerfProc_Process (IDProcess=id):
        n1, d1 = long (p.PercentProcessorTime), long(p.Timestamp_Sys100NS)
        n0, d0 = process_info.get (id, (0, 0))
 
      try:
        percent_processor_time = (float (n1 - n0) / float (d1 - d0)) *100.0
      except ZeroDivisionError:
        percent_processor_time = 0.0
      process_info[id] = (n1, d1)
 
      #if percent_processor_time > 0.01:
      print process.Caption, percent_processor_time
 
    print
  time.sleep (5)
 

this seems to take ages to get a result and and if i limit it to that single process it prints out the information as if it was ignoring but still gathering the other process's information and it takes 50% CPU usage... not good
there must be a simpler way to get a single process's cpu usage
please help

[dittytwo]

Hi all
i have managed to fix the 50% thing
bad coding had a while loop checking for the existence of something and no pause.. = loads of CPU resource.
i still need the %cpu-usage for a process any help would be great

[dittytwo]

Ok
I solved my own problem with a little help from SC (cheers Si)
worst thing is he doesn't even understand python... oh well here is the answer to get a process's CPU usage

import wmi,win32api,win32process
c = wmi.WMI ()
process_info = {}
  for p in c.Win32_PerfRawData_PerfProc_Process (name='firefox'):
    n1, d1 = long (p.PercentProcessorTime), long(p.Timestamp_Sys100NS)
    n0, d0 = process_info.get (id, (0, 0))
    try:
      percent_processor_time = (float (n1 - n0) / float (d1 - d0)) *100.0
    except ZeroDivisionError:
      percent_processor_time = 0.0
    process_info[id] = (n1, d1)
    print p.Caption, percent_processor_time
 

(NOTE: that you don't have to have the .exe at the end

simple really
I hope this helps someone else (this will be added to ASPN's python cook book.

cheers
D2

[bvdet]

Ok
I solved my own problem with a little help from SC (cheers Si)
worst thing is he doesn't even understand python... oh well here is the answer to get a process's CPU usage

import wmi,win32api,win32process
c = wmi.WMI ()
process_info = {}
  for p in c.Win32_PerfRawData_PerfProc_Process (name='firefox'):
    n1, d1 = long (p.PercentProcessorTime), long(p.Timestamp_Sys100NS)
    n0, d0 = process_info.get (id, (0, 0))
    try:
      percent_processor_time = (float (n1 - n0) / float (d1 - d0)) *100.0
    except ZeroDivisionError:
      percent_processor_time = 0.0
    process_info[id] = (n1, d1)
    print p.Caption, percent_processor_time
 

(NOTE: that you don't have to have the .exe at the end

simple really
I hope this helps someone else (this will be added to ASPN's python cook book.

cheers
D2

Thanks for sharing this with the Forum. I wish I could have helped, but I know little about interfacing with the operating system.