[Coral-dev] Printing packet stats: 0 packets received?

[Jeff Terrell]

On Tue, Jul 6, 2010 at 1:00 PM, Srinivas Krishnan <krishnan at cs.unc.edu> wrote:
>> I'd like to periodically print the number of packets that CoralReef
>> has dropped and the number it has received.  The interval
>> functionality seems to be a great mechanism for this.  However, I
>> think the statistics it is reporting to me are incorrect.
>
> I use coral_read_pkts (instead of read_pkt) and pass in a callback, which
> gets called at `interval' seconds to print out stats. In the past I have had
> issue with read_pkt where the struct would get zeroed out when I tried to
> read it at interval seconds. Using the callback, forces the library to call
> the handler and break out of the processing loop.
>
> Something like this:
>   coral_read_pkts(NULL, NULL, &process_pkt_handler, NULL, print_pkt_stats,
>                   &default_interval, stats);
>
> To the handler I pass in a stats struct,  Though, I think the
> post_interval_handler receives the  const coral_pkt_stats_t *stats,
> which has drops, received etc as well.
>
> -srinivas

Good suggestion--thanks, Srinivas!

I changed my little example program to use the coral_read_pkts()
callback-based interface, and I still have the same problem.  My
packet-handling callback is getting called the correct number of
times, but all of the stats counters are still 0.  My revised program
is here:

http://pastebin.com/8AQnKG6Y

So, I'm still at a loss here.  Any other ideas?

Thanks,
-Jeff T.