THANKS for the code! Some machines don’t have perf counters installed correctly so this is great!

Some quick tips:
* Instead of using DateTime.Now, .UtcNow would be better as it’s both faster and less dependent on user settings. But even better is Environment.TickCount since it is not dependent on the user not touching their clock.

* SubtractTimes can be static.

* I rolled the two properties into the code, inline, since they were only used once. Probably personal preference but the code seemed more readable for me that way.

But mostly THANKS again for the code!

Adam

the conversion in C# SubtractTimes (((UInt64)(a.dwHighDateTime << 32)) | (UInt64)a.dwLowDateTime) is incorrect. The correct conversion is (((UInt64)f.dwHighDateTime) << 32) | (UInt32)f.dwLowDateTime.

any help

thanks

As you have mentioned that your code is working for single process or program ,
please let me know what i need to add to the exiting code.
please!!
i want a code that takes a program name as argument and gives it cpu utilization as output.

thank u.

Idle time returned from GetSystemTimes is most probably a part of the Kernel time.

GetProcessTimes returns Kernel time without any Idle time periods because they belong to a different process.

So, the calculation takes the Idle time into account but I would say, it is correct.

For GetSystemTimes(), I think your only solution is to use the officially-unsupported function NtQuerySystemInformation (http://msdn.microsoft.com/en-us/library/ms724509(VS.85).aspx, look for SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION). I would put usage of this inside some #ifdef so it’s only used in Windows 2000/XP, because this method could change or be removed in future versions of Windows.

I wanted to use your program for my project, but the code uses GetSystemTimes() and GetTickCounts() which don’t seem to be supported by XP/2000. Is there a quick fix for that?

Thanks ,
Remy

p/s: Nice to meet you.

I would not expect it to match task manager exactly–they are measuring the program at different times, so there will be a little difference. Over time, they should average out to the same, though.

static void Main(string[] args)
{
Console.WriteLine(“Input:”);
string processName = Console.ReadLine();
usage.setProcessName(processName);

ThreadPool.QueueUserWorkItem(EatItThreadProc);
ThreadPool.QueueUserWorkItem(EatItThreadProc);

ThreadPool.QueueUserWorkItem(WatchItThreadProc);
ThreadPool.QueueUserWorkItem(WatchItThreadProc);

while (true)
{
Thread.Sleep(1000);
}
}

Can you explain for me?

Moreoverer, I try to compare your program and Task manager of Window, they have a little difference. So, your program ran exactly?

Thanks for your reply!

Thanks,
Bharath