Bug #340

USRP2 transmit underruns

Added by Matt Ettus over 4 years ago. Updated over 2 years ago.

Status:Closed Start date:
Priority:Normal Due date:
Assignee:Matt Ettus % Done:

0%
Category:gr-utils
Target version:release-3.2-series
Resolution:wontfix

Description

USRP2 transmission has underruns even at high interpolation rates

History

#1
Updated by Johnathan Corgan about 4 years ago

Addressed in r10262 by adding realtime scheduling to usrp2_siggen.py. Still needs verification.

#2
Updated by Johnathan Corgan about 4 years ago

  • Status changed from New to Assigned

Two issues so far have been corrected which contributed to this problem:

In r10117, an error was fixed that resulted in correct CIC interpolation rate set when desired overall interpolation was greater than 128. This fixed the "even at high interpolation rates."

In r10262, usrp2_siggen.py was modified to set the scheduling priority to real-time. This eliminated transmit underruns down to interpolation 5 on a 2.16GHz Core2 Duo (T60).

The problem remains at interpolation 4.

#3
Updated by Johnathan Corgan about 4 years ago

  • Status changed from Assigned to New

#4
Updated by Tom Rondeau over 2 years ago

  • Status changed from New to Closed
  • Resolution set to wontfix

Won't fix pending updates to UHD.

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