TDA4VM: PSDK-RTOS-J721E/TIDL/IVISION: Parallel execution of algProcess

Hello,

Is there any news on this topic?

I used a mutex for algProcess execution from two parallel threads, and observed that both threads execute to completion without any trouble. But I am still not able to execute the algProcess calls simultaneously from the two threads without the mutex.

Thanks and regards.

Hi Sagar,

Multithreading is expected to work. Each thread shall have a separate algHandle.  Could you confirm that you are creating two algorithm instances in this case?

Hello Kumar,

Yes, I can confirm that I am creating two algorithm instances with separate algHandles. The relevant code snippets are pasted below for your reference.

/*************************** tidl_tb.c ***************************/
...
void* TIDLRT_invoke_mt(void *args)
{
    ...
    currentArgs = (MTArgs*)args;
    void *handle = currentArgs->handle;
    ...
    //original TIDLRT_invoke function modified to post status via 4th argument
    TIDLRT_invoke(handle, in, out, &ret_status);
    ...
}
int32_t tidlMultiInstanceTest(int8_t** configNames, int32_t totalInsts, void * udmaDrvObjPtr, int32_t argc, char** argv, int32_t currConfigIdx)
{
    ...
    for(configCnt = 0; ((configCnt < totalInsts) && (status == IALG_EOK)); configCnt++)
    {
        ...
        for(k=0; k<2; k++)
        {
            arr_status[k] = TIDLRT_create(&prms, &arr_handle[k]);
            ...
        }
        ...
    }
    for(i = gParams.startFrameIdx; ((i < (gParams.startFrameIdx + gParams.numFrames)) && (status == IALG_EOK)); i++)
    {
        ...
        for(k=0; k<2; k++)
        {
            arr_args[k]->handle = arr_handle[k];
            ...
        }
        ...
        for(k=0; k<2; k++)
        {
            pthread_create(&arr_threads[k], NULL, TIDLRT_invoke_mt, (void*)arr_args[k]);
        }
        for(k=0; k<2; k++)
        {
            pthread_join(arr_threads[k], NULL);
        }
        for(k=0; k<2; k++)
        {
            pthread_detach(arr_threads[k]);
        }
        ...
    }
}

Am I missing something here?

Thanks and regards.

Please use the below example to create the multi-instance.

ti_dl/rt/test/pc/main.c

the one in below does not use the right library

ti_dl/test/src/pc_linux/main.c

BTW, You can also consider using the below simple TIDL-RT based example, this doesn't have many complexities compared to above

github.com/.../tidlrt_cpp