Re: [Discuss-gnuradio] Error while receiving

[kaleem ahmad]

Thanks Eric,

Can you give me a bit more explanation about why it is 'doomed to fail and
will sooner or later exhaust all memory'. Actually my plan is to run this
graph for ever and I dont have any idea why a graph(especially this one) 
will exhibit such behavior and what measure can be taken to avoid this....?

Any clue will be great help for me.

Best Regards
Kaleem Ahmad



Eric Blossom wrote:
> 
> On Thu, Oct 09, 2008 at 07:29:51AM -0700, kaleem ahmad wrote:
>> 
>> Hi,
>> 
>> I am using USRP+RFX1400+SUSI
>> 
>> I am using following flow graph to receive data>
>> 
>> usrp_source_c -> gr.fir_filter_ccf -> gr.quadrature_demod_cf ->
>> gr.simple_correlator -> gr.vector_sink_b
>> 
>> Some time I receive following error:
>> 
>> *** glibc detected *** python: free(): invalid next size (fast):
>> 0x08fcd970
>> ***
>> Segmentation fault
>> 
>> Can you suggest what can be the problem and what can I do to solve it.
>> 
>> Thanks
>> Kaleem Ahmad
> 
> Not sure where it's actually blowing up (definitely a bug somewhere).
> A stack trace from gdb would provide clues.
> 
> However, the flow graph you give above is doomed to fail.  It will
> sooner or later exhaust all memory on your system.  When this happens
> is should fail gracefully, but it may not.
> 
> Eric
> 
> 
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