topic this is my code in Intel® oneAPI Math Kernel Library

mkl_freeBuffer() access violation exception error

mmmmm__hamed — Sun, 13 Jul 2014 13:15:38 GMT

i use mkl c++ compiler 11.0.066 and mkl10.1 and c++/clr vs2008

i use fft and conv function from mkl in multi thread realtime application (each thread exec fft and conv parallel)

but after little time usage memory go up and application crash.

with any leak detector i cant find any leakage in my code .

recently i study mkl help and find i must use mkl_FreeBuffer() after mkl function for avoidance memory leakage

but when i call mkl_freeBuffer Application crash with access violation exception.

what shoud i do?

i use 64 bit mkl

additional library directory -> em64t\lib

additional dependecy -> mkl_intel_lp64_dll.lib ; mkl_intel_thread_dll.lib ; mkl_core_dll.lib

thanks for you.

Do you have callstack info?

Bernard — Mon, 14 Jul 2014 09:19:51 GMT

Do you have callstack info?

Judith_W_Intel — Mon, 14 Jul 2014 14:03:01 GMT

This question would probably be more appropriate for the MKL forum not the compiler forum.

https://software.intel.com/en-us/forums/intel-math-kernel-library

Good luck,

Judy

Hi,

KitturGanesh — Mon, 14 Jul 2014 23:15:18 GMT

Hi,

I'll transfer this issue to MKL forum so someone from that group can address this accordingly....

_Kittur

Can you give us the example

Gennady_F_Intel — Tue, 15 Jul 2014 02:59:29 GMT

Can you give us the example of your test which we can compile and check the problem with the latest version of MKL?

or you can try to evaluate the latest updates by yourself.

this is my code

mmmmm__hamed — Wed, 16 Jul 2014 08:00:02 GMT

this is my code

mkl_complex16* intelForwardFft (MKL_Complex16* input,int length)

{

DFTI_DESCRIPTOR *fft_handle;

dfticreatedescriptor(&fft_handle,dfti_double,dfti_complex,1,length) ;

dftisetvalue(fft_handle,dfti_placement,dfti_inplace);

dfti_computeforward(fft_handle,input);

dftifreedescriptor(&fft_handle);

mkl_FreeBuffers();

return input; ===>cursor stop here

}

MKL_Complex16* Convolution(MKL_Complex16* x,int xlength, MKL_Complex16* y , int ylength )

{

int convResLength=xlength+ylength-1;

VSLCONVTASKPTR task;

VSLCONVTASKPTR* task-ptr;

int iy0=0;

int *start=&iy0;

MKL_Complex16* res= (MKL_Complex16*) malloc(sizeof(MKL_Complex16) * convResLength);

memset( res, 0 , sizeof(MKL_Complex16) * ConvResLength );

int status;

int a= vslzConvNewTask1D( task_ptr , VSL_Conv_Mode_Auto , xlength , ylength ,convResLength );

int b = vslzConvSetStart( task , start);

status = vslzConvExec1D( task , x ,1 , y ,1, res , 1 );

vslconvdeletetask(task_ptr);

mkl_FreeBuffers();

return res;

}

>>>but when i call mkl

Bernard — Wed, 16 Jul 2014 09:16:35 GMT

>>>but when i call mkl_freeBuffer Application crash with access violation exception>>>

Probably heap corruption or double free.

Hi iliyapolak my code exist

mmmmm__hamed — Wed, 16 Jul 2014 10:08:56 GMT

Hi iliyapolak my code exist in above comment . no double free.

only function Result ( res variable ) will be released after use.

are you have idea?

Without the callstack of

Bernard — Wed, 16 Jul 2014 11:27:22 GMT

Without the callstack of crash is very hard to tell what has happend