Program Crashes with Performance Analyzer

[Rajesh_k_1]

Hi , I am currently experimenting with the Intel Vtune Performance Analyzer 2013 on Windows 7. My release build application seems to work fine however when I attempt to run the application from Performance Analyzer my 32 bit application just hangs. I am using VS2010 and QT. Any suggetsions on what might be going wrong ?

[SergeyKostrov]

Create a console Window with Win32 API and output some information there using printf CRT-function from several check-points created in sources. At least you will be able to see what application does when it hangs.

[Rajesh_k_1]

So after creating a log file. I noticed that it hangs during creation of threads. I have a for loop that creates a specific noumber of threads (That vary from 4 to 15) and if a no is large it simply hangs up. Any suggestions on how i may resolve that issue ?

[Bernard]

>>>So after creating a log file. I noticed that it hangs during creation of threads. I have a for loop that creates a specific noumber of threads (That vary from 4 to 15) and if a no is large it simply hangs up. Any suggestions on how i may resolve that issue ?>>>

How do you create threads?Do you use WinApi CreateThread() function?If you do can you put a breakpoint on this function call and inspect return value.

You mentioned log file please post it?

[Rajesh_k_1]

No I am using Boost thread to create the threads. I believe it uses the Win32 API underneath to create the threads. The log file I generated was custom made it just helped me diagnose where my program was hanging when launched by the performance analyzer

[Bernard]

>>>No I am using Boost thread to create the threads. I believe it uses the Win32 API underneath to create the threads>>>

Probably yes.

>>>and if a no is large it simply hangs up.>>>

What do you mean by writing this?Is this related to number of threads created.

[Rajesh_k_1]

Yes I believe it has something to do with the number of threads created. I am not sure why it has an issue with that.

[Bernard]

Are you running low on memory?Or do you have  large memory allocation?If you could post return value of CreateThread function,but you will need to use debugger for this.

[SergeyKostrov]

>>...Yes I believe it has something to do with the number of threads created. I am not sure why it has an issue with that... On 32-bit and 64-bit Windows platforms you could create thousands of threads and an actual number of threads depends on how much memory is allocated for the stack of a thread and how much total memory ( Physical plus Virtual ) a system has. I'll give you some example later. Try to debug the codes since the description of the problem is too generic in order to understand what could be wrong.

[SergeyKostrov]

>>...If you could post return value of CreateThread function, but you will need to use debugger for this... Debugger is Not needed to get an error code and a call to GetLastError Win32 function should provide you with exact reason why some thread was not created.

[SergeyKostrov]

Here are a couple of threads related to threads creation on a Windows platform: Forum Topic: Relationship between number of threads in OpenMP application and memory used Web-link: http://software.intel.com/en-us/forums/topic/279381 Forum Topic: Stress testing of Intel OpenMP library - More than 18,600 OpenMP threads created in a parallel region Web-link: http://software.intel.com/en-us/forums/topic/278302 Forum Topic: Couldn't create more than 64 OpenMP threads in a test application Web-link: http://software.intel.com/en-us/forums/topic/279487 Here are some numbers for a 32-bit Windows XP OS: [cpp] ... // Release configuration // RTuint uiStackSize; // Operating System: Windows XP 32-bit // C++ compiler MSC BCC MGW ICC // #define _STACK_SIZE 0 // Threads created: // #define _STACK_SIZE 1024 // 30,548 30,575 30,716 30,533 // #define _STACK_SIZE 2048 // 30,548 30,575 30,716 30,533 // #define _STACK_SIZE 4096 // 30,548 30,575 30,716 30,533 // #define _STACK_SIZE 8192 // 30,548 30,575 30,716 30,533 // #define _STACK_SIZE 16384 // 30,548 30,575 30,716 30,533 // #define _STACK_SIZE 32768 // 30,548 30,575 30,716 30,533 // #define _STACK_SIZE 65536 // 30,548 30,575 30,716 30,533 // #define _STACK_SIZE 131072 // 15,735 15,750 15,823 15,727 // #define _STACK_SIZE 262144 // 7,985 7,995 8,032 7,980 // #define _STACK_SIZE 524288 // 4,019 4,027 4,047 4,017 // #define _STACK_SIZE 1048576 // 2,016 2,021 2,031 2,015 // #define _STACK_SIZE 2097152 // 1,006 1,011 1,015 1,005 // #define _STACK_SIZE 4194304 // 501 504 507 500 ... [/cpp]

[Bernard]

Sergey Kostrov wrote:

>>...If you could post return value of CreateThread function, but you will need to use debugger for this...

Debugger is Not needed to get an error code and a call to GetLastError Win32 function should provide you with exact reason why some thread was not created.

Overlooked that options.

[Bernard]

I do not think that problem can be related to creation dozen of threads.

@Rajesh

if you would like to investigate your issue deeper there is one great tool or script which can dump hang process.It is called ADPlus.

[Rajesh_k_1]

iliyapolak wrote:

I do not think that problem can be related to creation dozen of threads.

@Rajesh

if you would like to investigate your issue deeper there is one great tool or script which can dump hang process.It is called ADPlus.

I will defnitely investigate this issue and post back here. Ill look over ADPlus

[Bernard]

>>>I will defnitely investigate this issue and post back here. Ill look over ADPlus>>>

ADPlus works with windbg.

[SergeyKostrov]

>>...No I am using Boost thread to create the threads. I believe it uses the Win32 API underneath to create the threads. >>The log file I generated was custom made it just helped me diagnose where my program was hanging when >>launched by the performance analyzer... >>... >>Yes I believe it has something to do with the number of threads created. I am not sure why it has an issue with that... I understood that you've found a reason, right? If Yes, How many threads were successfully created before the application hang?

[Bernard]

Hi Rajesh

do you have any updates?Did you try to use ADPlus?