[Discuss-gnuradio] Question about underrun

[Pan, Luyuan]

Hello everyone,
     I am wondering what will the USRP and GnuRadio do if an underrun 
happens? i.e. The console/terminal print out U. Does the USRP restart 
again or the flow-graph restart? I now face the problem that USRP takes 
more time to transmit all the data out(I need to add time.sleep() to 
make sure all the data are sent out successfully), does it have some 
relation with the underrun.
     Any suggestion is appreciated. Thank you for your help!
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Best regards,
Pan, Luyuan