Hi all,

I am playing with gnuradio and USRP but find something “weird”.
I am using a custom block with history samples. Since delay on stream tags is 
introduced, I use declare_sample_delay to offset it. So in the constructor of 
my custom block it is like:
set_history(hist_len+1);
declare_sample_delay(hist_len);

In experiments I found that it works well when hist_len is small. But if I set 
it to a rather large value (e.g., 1000), the output just lose all the tags the 
block is supposed to pass.
So I presume the scheduler cannot handle large delay?

Thanks.

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Liyang Zhang
PhD Candidate
Department of Electrical and Computer Engineering
Northeastern University
Email: liyan...@ece.neu.edu




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