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SYS/BIOS C6678 SRIO Broadcast Message

Lawrence Wong
Genius 15770 points

Question from customer about SRIO on C6678 running BIOSMCSDK

Is it possible to "broadcast" the incoming SRIO data to specific cores? i.e. If I have 4 cores that need the same incoming data. Is there a way to simultaneously send the same data to those specific 4 cores instead of having to send the same SRIO data 4 times? This would greatly benefit our throughput.



  • 0
    TI__Mastermind 23525 points

    Lawrence,


    Not explicitly, but you can maybe accomplish the same thing in other ways than having to resend data and use up link bandwidth.  First question are you using directIO or messaging? 

    - If DirectIO, then the packet payloads are specifically written to the address in the incoming packet.  So you could do things like, write to DDR or SL2 area, then either interrupt more than one core or interrupt one core and have the core set an IPC interrupt to the others.

    - If messaging, I'll have to ask some of the experts for details, but you can use the Navigator to copy/share the message between cores.

    Regards,

    Travis

  • 0 in reply to tscheck
    TI__Mastermind 23525 points

    Ok, we probably don't have exactly what is being asked for here already available, but there is a PA example in the MCSDK that can be used as a good starting point.  The PA unit tests project has test8.c that shows multirouting and test9.c that shows SRIO routing.

     

    C:\TI\mcsdk_xx_xx_xx_xx\pdk_C6678_x_x_x_x\packages\ti\drv\exampleProjects\PA_UnitTest_testProject

    Regards,

    Travis