Multiproc_self() always returns 0

Rao Munzir

Hi,

I am using IPC in a sample project for EVMK2H. But I am experiencing strange behavior of Multiproc_self() function. it always returns 0. My code is as:

/*
 *  ======== taskFxn ========
 */
Void taskFxn(UArg a0, UArg a1)
{

    UInt16 coreID = MultiProc_self();

    	System_printf("enter taskFxn() by Core %d\n", coreID);



    System_printf("exit taskFxn()\n");

    System_flush(); /* force SysMin output to console */
}

/*
 *  ======== main ========
 */
Int main()
{ 
    Task_Handle task;
    Error_Block eb;
    Int status;

    System_printf("enter main()\n");

    Error_init(&eb);
    status = Ipc_start();
    if (status < 0)
    {
        System_abort("Ipc_start failed\n");
    }

    task = Task_create(taskFxn, NULL, &eb);
    if (task == NULL)
    {
        System_printf("Task_create() failed!\n");
        BIOS_exit(0);
    }



    BIOS_start();    /* does not return */
    return(0);
}

when I load .out using linux utility mpmcl on dsp0,dsp1,dsp2,dsp3. I always get coreID = 0

Regards

over 9 years ago

0 Shankari G over 9 years ago

TI__Mastermind 43955 points

Hi Rao Munzir,
Have you tried this example through CCS and got the expected COREID no on all the cores?
processors.wiki.ti.com/.../MultiProc_Module

0 Rao Munzir over 9 years ago in reply to Shankari G

Expert 1070 points

I get right ID using DNUM but why can't I get it right with MultiProc_self();.

0 Rao Munzir over 9 years ago in reply to Rao Munzir

Expert 1070 points

I just checked in my .cfg file. There was issue as I didn't set MultiProc.setConfig(). I set this with syntax

var Ipc = xdc.useModule('ti.sdo.ipc.Ipc');
Ipc.procSync = Ipc.ProcSync_ALL;
Ipc.sr0MemorySetup = true;

var MultiProc = xdc.useModule('ti.sdo.utils.MultiProc');
var procNameAry = [ "CORE0", "CORE1", "CORE2", "CORE3", "CORE4", "CORE5",
        "CORE6", "CORE7","HOST" ];
MultiProc.setConfig(null, procNameAry);

But after doing that Ipc_start() hangs i.e doesn't return.

then I removed

//Ipc.procSync = Ipc.ProcSync_ALL;

after that I get VirtQueue_init(): MultiProc_self already set!. Even Main is not executed

0 Shankari G over 9 years ago in reply to Rao Munzir

TI__Mastermind 43955 points

Rao,

In the cfg file, add appropriate modules to use the function, Multiproc_self() below.

I have tested this function independently in using one of the K2H examples and able to get the core ID promptly.

In *.cfg
================================
/* IPC */
var MultiProc = xdc.useModule('ti.sdo.utils.MultiProc');
xdc.useModule('ti.sdo.ipc.Ipc');

MultiProc.setConfig(null, ["CORE0", "CORE1", "CORE2", "CORE3",
"CORE4", "CORE5", "CORE6", "CORE7"]);

================================
In app.c

int main(void)
{
uint16_t CoreID = 0;

CoreID = MultiProc_self();
printf("CoreID is %d\n",CoreID);

/* Start BIOS */
BIOS_start();
return (0);
}

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Multiproc_self() always returns 0