get cpu usage programatically

[test_man]

Is there anyway to receive total CPU usuage and cpu usuage by a program programatically?

[Wim S]

Hello Sheetal,

Take a look at the .NET example: c:\Program Files\National Instruments\CVI80\samples\dotnet\SimpleTaskMonitor

I never looked at the code, but it seems to me that this kinda does what you are looking for.

Good luck

Message Edited by Wim S on 03-01-2007 09:35 AM

[test_man]

Hi,

Thanks for your reply. This is exactly what I need. Only problem is CPU activity is always 0!

[Brandon_V]

Are you sure you have the .NET Framework installed? This example should give you CPU usage as long as it can make calls to .NET.

[test_man]

i have framework 2.0 installed.

[test_man]

I verified this on another PC and same results. CPU usuage is always 0. I do have framework 2.0 installed. CVI version 8.0.1.

[Patrick_P.]

Do you see anything?  Does the memory usage change at all and does it list the current processes?  Are either of these machines dual core machines?  Because it could be possible that the line that sets up the performance counter for the processor could be different if you have two processors.  It is located in the Initialize funciton.  Hope this helps!

[test_man]

Thanks for the reply.

Yes. I see 0% CPU usuage and bar keep going from left to right.

No, Memory usuage does not change. (memory Usage tab)

No, it is not dual core machine.

I do see all applications listed in Process tab and memory Usage does change there after I click refresh button.

[test_man]

When following called both     gCPUCounter = NULL and gCommittedBytesCounter=NULL.

System_Diagnostics_PerformanceCounter__Create_2(&gCPUCounter, "Processor",
        "% Processor Time", "_Total", 0);
    System_Diagnostics_PerformanceCounter__Create_4(&gCommittedBytesCounter,
        "Memory", "Committed Bytes", 0);

[Patrick_P.]

Hey Sheetal,

These counters are the same ones being used in performance monitor.  We can check to make sure these are working properly.  You should be able to go to Start>>Run and type in perfmon.  This should open performance monitor.  You can then right click on the graph and select to add a counter.  These should directly correspond to what is in CVI (Performance Object = Processor, Counter = % Processor Time).  You can test it here to make sure that you can see the CPU Usage.  Also what operating system are you running, Win XP SP2?