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I'm use wmic command to get current CPU utilization, the command are:

wmic cpu get LoadPercentage /value
It's works fine at first, but somehow it doesn't shows the LoadPercentage, but always returns with empty result like:
C:\Users\Administrator>wmic cpu get LoadPercentage /value
LoadPercentage=
It's so weird and I'm pretty sure that the result don't match with the taskmgr.exe. I also tried this command without /value, the result is still the same.
I have copy a large file in my server, and the CPU usage in TaskManager and wmic is like:
no matter what value is in TaskManager, the wmic always return empty value.
                It seems this happen when the percentage is zero, that is, it show LoadPercentage= instead of LoadPercentage=0
– Aacini
                Jul 1, 2014 at 10:20
                No, my system's CPU load is not zero and I have monitored the TaskManager, it's CPU load is not match with wmic's result.
– leeyiw
                Jul 2, 2014 at 1:15
                I believe Aacini is correct. I was able to get LoadPercentage= once out of ~30 tries on my PC. I also occasionally see CPU usage of 0% in task manager. The value is transient and variable, so trying to match WMIC value with task manager seems impossible.
– dbenham
                Jul 2, 2014 at 11:58
        
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