Re: psutil does not match Task Manager

[Giampaolo Rodola']

Please do not cross post. You have created 2 messages on the ml and filed an issue on the bug tracker.

As for your question: the 2 *single* CPU usage values cannot be exactly the same if you compare them at an exact moment in time.

To have a meaningful result you should collect, say, 10 values with 1 second interval and then calculate the average as in (a + b + ...) / 10.

On Monday, May 20, 2013 8:39:08 AM UTC+2, senzh...@gmail.com wrote:

I have a task which needs to detect CPU usage of a process. 

I am using psutil library. When the program is running, Task Manager 
shows that it is using(35%), however when I use this code

import psutil

psutil.get_pid_list()

p = psutil.Process(3256)

print p.name

print  p.get_cpu_percent(interval=1)

it shows : CPU usage is 79.7%

Why there is such a big difference between Task Manager data and 
psutil? 
why psutil does not match Task Manager ?