Question

I’m trying to use tasklist to find out which process is consuming more than X percent of my CPU (to later kill it with taskkill.)

How do I know what percent a time format represents?

The documentations says:

TASKLIST options  /FI   filter                

And one filter may be:

CPUTIME         eq, ne, gt, lt, ge, le        CPU time in the format: hh:mm:ss.                                               hh - number of hours,                                               mm - minutes, ss - seconds 

If I try

tasklist /FI 'CPUTIME gt 00:00:10'  

it works.

But if I

tasklist /FI 'CPUTIME gt 90' 

it doesn’t.

How can I know that time format represent 90%? Or 80%? What’s the relationship between CPU usage time and the CPU usage percent?

Answer 1

Tasklist’s CPUTime is a measure of how much CPU time (cycles) have been used since the start of the process, so to convert that to a percent, it would be

 (TotalProcessRuntime / CpuTime) / 100 

At least, thats what I gather 🙂