Stacks in OpenMP

IChung

Intellectual 440 points

Other Parts Discussed in Thread: TMS320C6678

I am writing an OpenMP code with bare-metal mode configuration using OpenMP runtime 2.x.

There are two kinds of stacks in the code.

One is "program.stack = 0x10000;" in the .cfg file and

the other is " __TI_omp_config_thread_stack(1, 0x20000);" in the C file.

How do the two stacks differ? What are the respective roles of the stacks?

over 10 years ago

0 Raja over 10 years ago

TI__Guru* 81335 points

Hi IChung,
What is the target DSP used?

0 IChung over 10 years ago in reply to Raja

Intellectual 440 points

The target DSP is TMS320C6678.

0 Ajay Jayaraj over 10 years ago

TI__Expert 3350 points

The default OpenMP Runtime configuration places the stack in each core's L2SRAM and sizes them to 128KB setting program.stack to
0x20000 in the RTSC config file. Refer openmp_dsp_2_<version>/packages/examples/hello/omp_config.cfg.

It is possible to configure the runtime to place the stacks in MSMCSRAM or DDR. This is done via the __TI_omp_config_thread_stack API. Refer section "Reducing Memory Footprint in L2SRAM" in the User Guide for details on how to perform this configuration in bare-metal mode or BIOS mode.

Ajay

Processors

Processors forum

Stacks in OpenMP