How to convert a tasklist's CPU time to CPU % usage?

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?

Accepted Answer

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 :)

How to convert a tasklist's CPU time to CPU % usage?

Solution

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