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How to get process' CPU usage knowing PID?

18 New Member
I'm trying to send out an alert in case when process takes more than certain % of CPU. I'm using the following code to get it:

PerformanceCoun ter pcProcess = new PerformanceCoun ter();
pcProcess.Categ oryName = "Process";
pcProcess.Count erName = "% Processor Time";
pcProcess.Insta nceName = "ProcessNam e";
pcProcess.NextV alue();
System.Threadin g.Thread.Sleep( 1000);
double d = pcProcess.NextV alue();
//Console.WriteLi ne("Process:{0 } CPU% {1}", strProcessName, d);

After that I'm using d variable to check if alert needs to be sent out or not.

But the problem is my program is running in many instances meaning all those instances have the same process name in task manager and therefore I don't know which one is which. So the point is I want each instance to check its own % process time, how do I separate them? I can get PID using Process class but how would I use it?
Or maybe you know the way to set a process name in the beginning of the code for each instance?
Also say there are 3 processes with the same name, which one's % Processor Time would PerformanceCoun ter get using the code above?

Thank you in advance!
Jul 26 '07 #1
17 17975
Dimon
18 New Member
please need help ASAP!
Jul 26 '07 #2
Plater
7,872 Recognized Expert Expert
If you are running your .exe 3 times, each will have a different PID.
If they are running as threads, you can use the thread ID.

Other then that I'm not sure what you are asking?
Jul 26 '07 #3
Dimon
18 New Member
If you are running your .exe 3 times, each will have a different PID.
If they are running as threads, you can use the thread ID.

Other then that I'm not sure what you are asking?
Yes, that's the whole point - I can get PID for each one but how would I use it to get CPU usage for every instance? Using PerformanceCoun ter class I can retrieve CPU usage knowing process name, but since process name is the same for all three instances I need to distinguish them somehow so that I know what instance is related to what CPU usage.
Jul 26 '07 #4
Plater
7,872 Recognized Expert Expert
Cannot you get process usage information based on PID? Because I am pretty sure you can get at that from withen the code.
Or you can go through the Process class and maybe find it.
Jul 26 '07 #5
Dimon
18 New Member
Cannot you get process usage information based on PID? Because I am pretty sure you can get at that from withen the code.
Or you can go through the Process class and maybe find it.
Well, if I could get this information based on PID I wouldn't post :)
I tried to go through Process class but couldn't find anything except this
Process.GetCurr entProcess().To talProcessorTim e, but I'm not sure how it's related to CPU usage (%) that you can see in task manager.
Jul 26 '07 #6
TRScheel
638 Recognized Expert Contributor
Well, if I could get this information based on PID I wouldn't post :)
I tried to go through Process class but couldn't find anything except this
Process.GetCurr entProcess().To talProcessorTim e, but I'm not sure how it's related to CPU usage (%) that you can see in task manager.
Expand|Select|Wrap|Line Numbers
  1. static void Main(string[] args)
  2. {
  3.     foreach (Process p in Process.GetProcesses())
  4.     {
  5.         PerformanceCounter pc = new PerformanceCounter();
  6.         pc.InstanceName = p.ProcessName;
  7.  
  8.         Thread TestThread = new Thread(new ParameterizedThreadStart(GetCPUPercentage));
  9.         TestThread.Start(pc);
  10.     }
  11.     ConsoleUtilities.PressAnyKey("");
  12. }
  13.  
  14. static void GetCPUPercentage(Object pc)
  15. {
  16.     try
  17.     {
  18.         ((PerformanceCounter)pc).CategoryName = "Process";
  19.         ((PerformanceCounter)pc).CounterName = "% Processor Time";
  20.         ((PerformanceCounter)pc).NextValue();
  21.         Thread.Sleep(1000);
  22.         Console.WriteLine("{0}: {1}%", ((PerformanceCounter)pc).InstanceName, ((PerformanceCounter)pc).NextValue());
  23.     }
  24.     catch { }
  25. }
  26.  
That can be easily modified to grab the process in question. For instance, if you passed an array to GetCpuPercentag e, and in one item you had the performance counter and in another you had the process, you could grab the PID of the problematic instance.


EDIT: ConsoleUtilitie s is a library I built of common things I do on the console (such as, say "Press any key to continue")
Jul 26 '07 #7
Dimon
18 New Member
Expand|Select|Wrap|Line Numbers
  1. static void Main(string[] args)
  2. {
  3.     foreach (Process p in Process.GetProcesses())
  4.     {
  5.         PerformanceCounter pc = new PerformanceCounter();
  6.         pc.InstanceName = p.ProcessName;
  7.  
  8.         Thread TestThread = new Thread(new ParameterizedThreadStart(GetCPUPercentage));
  9.         TestThread.Start(pc);
  10.     }
  11.     ConsoleUtilities.PressAnyKey("");
  12. }
  13.  
  14. static void GetCPUPercentage(Object pc)
  15. {
  16.     try
  17.     {
  18.         ((PerformanceCounter)pc).CategoryName = "Process";
  19.         ((PerformanceCounter)pc).CounterName = "% Processor Time";
  20.         ((PerformanceCounter)pc).NextValue();
  21.         Thread.Sleep(1000);
  22.         Console.WriteLine("{0}: {1}%", ((PerformanceCounter)pc).InstanceName, ((PerformanceCounter)pc).NextValue());
  23.     }
  24.     catch { }
  25. }
  26.  
That can be easily modified to grab the process in question. For instance, if you passed an array to GetCpuPercentag e, and in one item you had the performance counter and in another you had the process, you could grab the PID of the problematic instance.


EDIT: ConsoleUtilitie s is a library I built of common things I do on the console (such as, say "Press any key to continue")
Thank you.
But I'm not sure how your code helps me. Let's look at the example:
I have program named test.exe. There are three scheduled tasks that runs this program with different parameters on the same server, say "test 1/2/3". If you look at the task manager u'll see 3 processes with the "test" name.
Using your code in main method in loop through the processes it gets process with the "test" name and passes it in to the GetCpuPercentag e method, but how does it know what "test" process from the list of processes to grab? There are three of them. I need to write it the way so say instance test1 checks just process that was created by this instance and doesn't touch other two with the same name.

BTW, forgot to mention - I'm working with Framework 1.1 (trying to convince management to switch to at least 2 version), so ParameterizedTh readStart won't really work. I'm not even sure what it's for as I never dealt with such Thread constructor :)
Jul 26 '07 #8
TRScheel
638 Recognized Expert Contributor
Thank you.
But I'm not sure how your code helps me. Let's look at the example:
I have program named test.exe. There are three scheduled tasks that runs this program with different parameters on the same server, say "test 1/2/3". If you look at the task manager u'll see 3 processes with the "test" name.
Using your code in main method in loop through the processes it gets process with the "test" name and passes it in to the GetCpuPercentag e method, but how does it know what "test" process from the list of processes to grab? There are three of them. I need to write it the way so say instance test1 checks just process that was created by this instance and doesn't touch other two with the same name.

BTW, forgot to mention - I'm working with Framework 1.1 (trying to convince management to switch to at least 2 version), so ParameterizedTh readStart won't really work. I'm not even sure what it's for as I never dealt with such Thread constructor :)

Well, I was getting to the fact that if you pass the process into the thread start function as well, you will have all the information about that specific process (such as the PID, etc).

ParameterizedTh readStart lets you pass variables into a thread start. Without this, you will need to rethink how my method works.

Here is the updated code (and please note, its a staple example of ugly arse code, coded for functionality):

Expand|Select|Wrap|Line Numbers
  1. static void Main(string[] args)
  2. {
  3.     foreach (Process p in Process.GetProcesses())
  4.     {
  5.         PerformanceCounter pc = new PerformanceCounter();
  6.         pc.InstanceName = p.ProcessName;
  7.  
  8.         Thread TestThread = new Thread(new ParameterizedThreadStart(GetCPUPercentage));
  9.         ArrayList al = new ArrayList();
  10.         al.Add(pc);
  11.         al.Add(p);
  12.         TestThread.Start(al);
  13.     }
  14.     ConsoleUtilities.PressAnyKey("");
  15. }
  16.  
  17. static void GetCPUPercentage(Object Params)
  18. {
  19.     PerformanceCounter pc = (PerformanceCounter)((ArrayList)Params)[0];
  20.     Process p = (Process)((ArrayList)Params)[1];
  21.     try
  22.     {
  23.         pc.CategoryName = "Process";
  24.         pc.CounterName = "% Processor Time";
  25.         pc.NextValue();
  26.         Thread.Sleep(1000);
  27.         Console.WriteLine("{0} | {1}: {2}%", pc.InstanceName, p.Id, pc.NextValue());
  28.     }
  29.     catch { }
  30. }
  31.  
Jul 27 '07 #9
Plater
7,872 Recognized Expert Expert
The process class contains a thing that lets you see what the command line arguments to the program was. So if you started the programs:
"test.exe 123"
"test.exe 4-6-7"
"test.exe blah"

You would be able to see the "123", "4-6-7", "blah" in the Process class.
Jul 27 '07 #10

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