How to define extra memory for openmp example

JGarcia

Other Parts Discussed in Thread: SYSBIOS

Hi

I am trying to test my code using openmp  with 8 cores,

example modified to 8 cores works well but I added my code

that needs some memory about 5Mbytes in global variables, and the compiler

shows next errors

<Linking>
"./configPkg/linker.cmd", line 249: error #10099-D: program will not fit into

   available memory. run placement with alignment fails for section ".far"
>> Compilation failure
   size 0xfd64b4 . Available memory ranges:
   MSMCSRAM_NOCACHE   size: 0x300000     unused: 0x27fee0     max hole:
   0x27fee0
"./configPkg/linker.cmd", line 120: error #10099-D: program will not fit into
   available memory. run placement with alignment fails for section
   ".localfar" size 0x40ae5c . Available memory ranges:
   L2SRAM       size: 0x80000      unused: 0x7eedc      max hole: 0x7eedc
error #10010: errors encountered during linking; "hello_openmp_evm6678.out" not
   built
gmake: *** [hello_openmp_evm6678.out] Error 1
gmake: Target `all' not remade because of errors.

**** Build Finished ****

Somebody could tell me how to modified the amount of memory to  get this example works

properly.

Thanks in advance.

Julian

over 12 years ago

0 Uday over 12 years ago

TI__Expert 4920 points

Julian

For large data buffers it's best to control where you place these global variables by adding something like the following code:

CFG file

Program.sectMap[".inputbuff"] = "DDR3";

C file

#pragma DATA_SECTION(buffer, ".inputbuff");
#pragma DATA_ALIGN(buffer, 128);
char buffer[bufsize];

main () {

}

0 JGarcia over 12 years ago in reply to Uday

Expert 1270 points

Uday,

I have changed data definition with DATA_SECTION and it works

well. I tested my functions and they work well, these functions process a couple of arrays in a for loop, until here

everything is alright.

But when I add the #pragma omp for directive before for loop, this cause the running ends suddenly and the console shows:

[C66xx_0] ti.sysbios.knl.Task: line 355: E_stackOverflow: Task 0x90000088 stack overflow.
xdc.runtime.Error.raise: terminating execution

I have opened ROV and this is what it shows.

I search for omp utils and I found that in omp_config_pe66.c is defined the stack

/* stackSize__C */
__FAR__ const CT__ti_omp_utils_OpenMP_stackSize ti_omp_utils_OpenMP_stackSize__C = (xdc_SizeT)0x8000;

so the question is It is posible modify it?, because I can not write on that file or maybe Is there other place where I can modify

this StackSize value?.

Regards

Julian

0 JGarcia over 12 years ago in reply to JGarcia

Expert 1270 points

Hi,

I have added the follow line to cfg file

OpenMP.stackSize = 0x9000;

and it modifies the line

/* stackSize__C */
__FAR__ const CT__ti_omp_utils_OpenMP_stackSize ti_omp_utils_OpenMP_stackSize__C = (xdc_SizeT)0x8000;

/* stackSize__C */
__FAR__ const CT__ti_omp_utils_OpenMP_stackSize ti_omp_utils_OpenMP_stackSize__C = (xdc_SizeT)0x9000;

and it seems to solve the problem.

Regards

Julian

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How to define extra memory for openmp example