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Why aren't the low-level Ethernet statistics updating?

Steve Ziuchkovski
Expert 1255 points

I'm troubleshooting Ethernet issues we're having with our board and a C6655 DSP. See here for a related question I posted over in the DSP forums.

I have the following code executing every half second, printing the statistics using platform_write():

#include <stack/inc/rawethif.h>
#include <stack/inc/rawif.h>
#include <stack/inc/ipif.h>
#include <stack/inc/tcpif.h>

void half_second_debug()
{
	platform_write("Raw Ethernet : Rx: %d  RxDrop: %d  Tx: %d  TxFailMem: %d\n", raweths.RcvTotal, raweths.RcvDrops, raweths.SndTotal, raweths.SndNoPacket);
	platform_write("Raw Transport: Rx: %d  RxFull: %d  Tx: %d  TxFail   : %d\n", raws.RcvTotal, raws.RcvFull, raws.SndTotal, raws.SndNoPacket);
	platform_write("IP           : TotalPkt: %d\n", ips.Total);
	platform_write("TCP          : RxBytes: %d  TxBytes: %d\n", tcps.RcvByte, tcps.SndByte);
}

However, the raweths and raws statistics are not updating. This is the output after running for a bit:

Raw Ethernet : Rx: 0  RxDrop: 0  Tx: 0  TxFailMem: 0
Raw Transport: Rx: 0  RxFull: 0  Tx: 0  TxFail   : 0
IP           : TotalPkt: 974
TCP          : RxBytes: 30330  TxBytes: 56521

Why aren't they updating? The network stack is operational and packets are being sent and received, as indicated by the ips and tcps stats.

  • 0
    TI__Mastermind 26780 points

    Steve,

    I’m wondering if the statistics updating is fully enabled in your driver.  (I don’t have these driver sources with me.)  Can you check your driver source to see that the stat updates are indeed enabled?  I heard of a case where these were #ifdef-disabled as a default for one driver.  And the driver had to be rebuilt to enable these statistics.)  I don’t know if this applies to you, but it is one possibility.

    Low-level driver questions are usually handled on the device forums.  You have that thread on the C6000 multicore forum.  And I see the message that the response to you might be delayed.  Hopefully they get back to you soon, as they can provide the best support for questions about dynamic updates to raweths stats…

    Regards,
    Scott