Network error

[Chris Johns]

Steve Holle wrote:
> At 01:48 PM 12/7/2004, Joel Sherrill <joel at OARcorp.com> wrote:
> 
>> Steve Holle wrote:
>>
>>> I'm trying to stream 16-bit audio samples at 8ksps over the network 
>>> using datagram packets.  After running for a cople of minutes RTEMS 
>>> halts with "RETMS: Can't obtain network semaphore."  These samples 
>>> are sent in packets of  128 16-bit words ( 256 8-bit bytes ) every 16mS.
>>> All that's in the DDD backtrace after the crash is :
>>> ZEROLOOPTEST();
>>> boot_card() at bootcard.c:133
>>> sp_cleanup() at bspclean.c:34
>>> Any idea what could be causing this?
>>
>>
>> Are you trying to access the network stack from an ISR by any chance?
> 
> 
> No.  I load up buffers in my interrupt and send a pointer to the buffer 
> and length through an RTEMS message queue.  The network send and receive 
> are handled in independant threads.
> 
> 

Are your stack sizes large enough ?

Any chance you can run with a debugger and set a break point on the line 
312 of cpukit/libnetworking/rtems/rtems_glue.c ?

We can then see which thread is failing.

Are your networking threads higher or lower in priority than the network 
stack and drivers ?

-- 
  Chris Johns