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Beginner
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Offload from dynamic link library

Hello,

I am new to programming for the Xeon Phi, and I am having trouble getting explicit offload to work when the offload is done in a dynamic-link library. The code fails at run time at the offload location, with a messages:

"offload error: Cannot find host executable
offload error: cannot start process on the device 0 (error code 6)"

If I am setting environment variable OFFLOAD_INIT=on_start I get the next message:

"[Offload] [MIC 0] [File]                    c:\temp\init_xeon.cpp
[Offload] [MIC 0] [Line]                    28
[Offload] [MIC 0] [Tag]                     Tag 0
offload error: cannot create pipeline on the device 0 (error code 14)"

I am using C++ on  Windows Server 2012R2, using Parallel Studio XE 2015 Update 6 Cluster Edition, MPSS version 3.6.1.

A simple example of what I'm trying to do is below :

A basic main program which loads the dynamic library and calls the function in it :

int _tmain(int argc, _TCHAR* argv[])
{
	HINSTANCE hInstLib = LoadLibraryA("TestXeonDll.dll");
 
	_StartDllXeonInit	StartDllXeonInit	= (_StartDllXeonInit)	GetProcAddress(hInstLib, "StartDllXeonInit");
 
 	StartDllXeonInit();
 
 	FreeLibrary(hInstLib);
	
	return 0;
}

And the contents of dynamic library:

void StartDllXeonInit()
{
	init_xeon();
}


void init_xeon()
{
	uint32_t  a = 0;

#pragma offload target(mic) inout(a)
	{
		a += 1;
	}
}

If I do the offload in the main program, it works fine. Any clues as to what I'm doing wrong ?

Thanks,

Fedor.

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1 Reply
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Beginner
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 Hi,Fedor Z !  

      Nowadays,  I have the same problem with you, have you solved this problem?  

      I'm  nearly crazy about this problem, so I very looking forward your help.

      Thanks !

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