Hi Tom,
What you have suggested is absolutely fine but it does not solve my problem.
Actually, my custom block sends a burst of N samples whenever a condition in
its code is met. Since that conditon is met pretty much regularly, I can say
that the custom block sends a burst after every ~30 mS. Now, whenever
noutput_items=2N are assigned to work() of my custom block, I observe that
particular (to be transmitted) burst somehow does not get sent asap, rather it
is sent after ~200mS. I have verified this by two ways:
i) I receive the transmitted bursts at another node and measure the delay
between successive bursts.
ii) On the other hand, I time each bursts by means of tx_time_tag. Then, I do
see that whenever noutput_items=2N, I see "L" printed in the console (which
means packet is late and is discarded by the FPGA).
So, in summary, I would like to send my bursts asap no matter what value
noutput_items takes. Or, I want the scheduler to assign me exactly
noutput_items=N items everytime. What do you suggest?
Thanks,
Yu.
p.s.
Alex,
Could you explain a bit more how to accomplish what you have said? Thanks.
________________________________
From: Tom Rondeau <[email protected]>
To: Zing Yu <[email protected]>
Cc: "[email protected]" <[email protected]>
Sent: Friday, November 30, 2012 7:24 PM
Subject: Re: [Discuss-gnuradio] control of noutput_items by the user
Yu,
You don't always have to consume everything that's handed to you. So if you get
kN items, just process N of them, return N, then the scheduler will pass you
the next N items in the buffer next time.
Tom
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