Oh I didnt know it.
Thanks for correcting it
Regards
Jeon
2015. 7. 9. 오전 11:51에 "Nowlan, Sean" <sean.now...@gtri.gatech.edu>님이 작성:
> Null source just sets all outputs to zero, so it’s equivalent to a
> constant source with the scalar=0.
>
>
>
> …
>
> for(size_t n = 0; n < input_items.size(); n++) {
>
> optr = (void*)output_items[n];
>
> memset(optr, 0, noutput_items *
> output_signature()->sizeof_stream_item(n));
>
> }
>
> …
>
>
>
> I think this is some subtle issue with Stream Mux’s forecast function and
> how it interacts with the scheduler knowing when to advance read pointers
> from the upstream block. This is just a wild guess, though. Also, I’ve seen
> an upstream block connect to two inputs of a Multiply block to create a
> squaring device, and that seems to work just fine. But in Stream Mux’s
> case, it’s only copying from one input at a time.
>
>
>
> Sean
>
>
>
> *From:* discuss-gnuradio-bounces+sean.nowlan=gtri.gatech....@gnu.org
> [mailto:discuss-gnuradio-bounces+sean.nowlan=gtri.gatech....@gnu.org] *On
> Behalf Of *Jeon
> *Sent:* Wednesday, July 08, 2015 10:46 PM
> *To:* Discuss GNU Radio mailing list
> *Subject:* Re: [Discuss-gnuradio] Flowgraph locking up with Stream Mux
>
>
>
> whileni didnt look into null source block code,
>
> but the basic behavior of null source block is,
>
> it outputs nothing.
>
> So stream mux waits until input blocks pass a given number of samples and
> it takes forever
>
> Regards
> Jeon
>
> 2015. 7. 9. 오전 11:27에 "Nowlan, Sean" <sean.now...@gtri.gatech.edu>님이 작성:
>
> I’m somehow getting a simple flowgraph to lock up GNU Radio. It locks up
> every time I run it, after roughly the same amount of time. As you can see
> in the attached image and GRC file, I’m feeding two inputs of a Stream Mux
> block from the same upstream block. Do you imagine why that might cause
> problems?
>
>
>
> I know there are other ways to do what I’ve shown here, but locking up
> seems like a bug.
>
>
>
> Thanks,
>
> Sean
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
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