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

Answer 1

It doesn't look like there's an easy way to do this with tasklist, so I would suggest either doing this in VBscript or another scripting language, or using a different approach. If you're constrained to batch files then you could use the WMIC command to get the list of running processes with their respective CPUTime:

C:\> wmic path Win32_PerfFormattedData_PerfProc_Process get Name,PercentProcessorTime

Name                 PercentProcessorTime
Idle                 0
System               0
Smss                 0
csrss                0
winlogon             0
services             0
lsass                0

[...]

wmiprvse             100
wmic                 0
_Total               100

Note that this in my testing showed wmipsrv.exe as having 100% CPU, because it spiked while executing the WMI query. You should account for that in your script or you'll end up trying to kill the WMI service constantly ;)

Reference:
http://waynes-world-it.blogspot.com/2008/09/useful-general-command-line-operations.html
http://technet.microsoft.com/en-us/library/bb742610.aspx