Instrumentation Hot Path or Call Tree depth

Question

Hi,
I have a basic question regarding the profiler in Visual Studio 2013 running an Instrumentation report against a Console Application.
When I run an instrumentation profiler report against my programs often the Hot Path and Call Tree does not contain enough "depth" or "levels" of subroutines meaning whilst I can see at a high level where time is being spent I cannot
see at a detailed level.
I have created a basic test program to highlight this problem:-
Sub Main()
Number1()
End Sub
Sub Number1()
Number2()
End Sub
Sub Number2()
Number3()
End Sub
Sub Number3()
Number4()
End Sub
Sub Number4()
Number5()
End Sub
Sub Number5()
Threading.Thread.Sleep(10000)
End Sub
When I run an instrumentation profile on this program I get the following call tree
Function Name Number of Calls Elapsed Inclusive Time % Elapsed Exclusive Time % Avg Elapsed Inclusive Time Avg Elapsed Exclusive Time Module Name
Test.exe 0 100.00 0.00 0.00 0.00
Test.Module1.Main() 1 100.00 0.73 11,273.05 82.05 Test.exe
Test.Module1.Number1() 1 88.74 0.01 10,004.19 0.67 Test.exe
Test.Module1.Number2() 1 88.74 0.01 10,003.53 0.73 Test.exe
Test.Module1.Number3() 1 88.73 0.01 10,002.80 0.67 Test.exe
Test.Module1.Number4() 1 88.73 88.73 10,002.13 10,002.13 Test.exe
What happened to subroutine Number5() which is the subroutine that actually contains the problem?
I have tried many options in VS (including Exclude small functions option in vsp project) to try and get the call tree to "go deeper" but it wont and I find myself having to go back to 3rd party products.  Am I doing something wrong?
Regards

Answer 1

Hi SB040404,
>>What happened to subroutine Number5() which is the subroutine that actually contains the problem?
If you remove the code "Threading.Thread.Sleep(10000)", and then add some simple code, profile your app again, could you get the information about the "Number5()"?
I doubt that it would be a limitation:
https://social.msdn.microsoft.com/Forums/en-US/28f712b8-1280-4d2a-93fb-a8eebc84aa9c/exclude-calls-to-threadsleep-in-instrumentation-mode?forum=vstsprofiler
Best Regards,
Jack
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