De1Soc Mutlithreading

Altera_Forum · ‎03-22-2018

Hi,

My question is, does De1soc capable of mutlithreading? I know it has Arm Cortex9 with 2 core. Does it support OpenMP?

The reason is, i have this task and it is taking longer than i expected.

void transpose(int h, int w, float *x){    int i, j;
    float *temp = (float *) calloc(h*w, sizeof(float));
    (float *)memcpy(temp,x,h*w*sizeof(float));
   # pragma omp parallel for
    for ( i = 0; i < h ; ++i){
        for( j = 0 ; j < w ; ++j){
            x = temp;
        }
    }
    free(temp);
}

I tried compile with the -fopenmp flag and ran on de1soc. Results were the same.

Altera_Forum · ‎03-22-2018

Cortex-A9 is an ARMv7 architecture. According to the ARM web site, architectures earlier than ARMv8 are not

supported by the ARM compiler for HPC:

https://developer.arm.com/products/software-development-tools/hpc/documentation/supported-platforms

Altera_Forum · ‎03-22-2018

Thanks Austin, so i assume there is no other way to mutlithread except pthreading?

Altera_Forum · ‎03-22-2018

I don't know, I have not investigated using multithreading on the Terasic platforms.