Now i'm working on a windows project and encountered below problem.
System are with 32 Cpus. And for my process "aaa", i made Cpu affinty on it with CPU0,1.
Then running some script stress on process "aaa".
I record the counter data for process "aaa"'s "%processor time" for about 1 min by every 30/sec
Then i calculate the average Cpu utilization for process "aaa" as (190+199)/2 /2 = 97.25
So i thought the average Cpu utilization for Cpu0 and Cpu1 is about 97.25% (For process "aaa" there was only 2 Cpu System)
But some person in my team said my calculation is wrong and should be (190+199)/2 / 32 = 6.0
6.0 is the total Cpu utilization of process "aaa"
So here is the problem which one is correct?
Thanks for helping on this!
This is not an easy value to get out of perfmon. This is the way it has been explained to me.
Assume 1 CPU here.
First you need to know Processor\% User Time\_total value.
Then you need to know your Process\% Processor time\(your application).
The amount of CPU you are using is (Processor\% User Time\_total)*(Process\% Processor time\(your application))
For example Processor\% User Time\_total averaged 25%
Process\% Processor time\(your application) = 50%
Your application is using 25%*50% or 12.5% of your CPU
Now lets add 4 process
The max value for (Process\% Processor time\(your application) is 400% (100% * number of processor)
So this would be the equation for multi processor box.
(Processor\% User Time\_total)*((Process\% Processor time\(your application)/Number of CPU))
Bruce Adamczak Please click "Mark as Answered" if a post solves your problem Please click "Vote As Helpful" if you find the answer helpful