[USRP-users] Late packets discarded?

Per Zetterberg perz at kth.se
Tue Sep 25 09:29:14 EDT 2012


Which policy is default?

BR/
Per
________________________________________
From: usrp-users-bounces at lists.ettus.com [usrp-users-bounces at lists.ettus.com] on behalf of Josh Blum [josh at ettus.com]
Sent: Tuesday, September 25, 2012 3:17 PM
To: usrp-users at lists.ettus.com
Subject: Re: [USRP-users] Late packets discarded?

On 09/24/2012 06:53 PM, Tim Pitman wrote:
> When a USRP detects a late packet is the packet transmitted ASAP or
> simply discarded?
>

I believe that late packets will be dropped by default and then continue
at the next packet. They follow the underflow policy:

"""
underflow_policy: how the TX DSP should recover from underflow. Possible
options are "next_burst" or "next_packet". In the "next_burst" mode, the
DSP drops incoming packets until a new burst is started. In the
"next_packet" mode, the DSP starts transmitting again at the next packet.
"""

http://files.ettus.com/uhd_docs/doxygen/html/structuhd_1_1stream__args__t.html#a4463f2eec2cc7ee70f84baacbb26e1ef

-josh

> Thanks,
> Tim
>
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