Difference between revisions of "Packet Flow Errors"
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| + | ==Introduction== | ||
| + | Application Note Number: AN-5501 | ||
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| + | Authors: John Smith and Jane Smith | ||
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| + | Last Modified Date: 2016/04/15 | ||
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| + | ==Overview== | ||
Packet flow errors printed in console/terminal as upper-case letters: | Packet flow errors printed in console/terminal as upper-case letters: | ||
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Underrun on Tx (“U”): | Underrun on Tx (“U”): | ||
Samples not being produced by the host application fast enough. CPU governor or other power management not configured correctly. | Samples not being produced by the host application fast enough. CPU governor or other power management not configured correctly. | ||
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Samples are not being produced by user's application fast enough. CPU governor or other power management not configured correctly. Incorrect/invalid time_spec provided. Usually on MIMO. | Samples are not being produced by user's application fast enough. CPU governor or other power management not configured correctly. Incorrect/invalid time_spec provided. Usually on MIMO. | ||
http://files.ettus.com/manual/page_usrp_x3x0_config.html | http://files.ettus.com/manual/page_usrp_x3x0_config.html | ||
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| + | [[Category:Application Notes and White Papers]] | ||
Latest revision as of 14:48, 19 April 2016
Introduction
Application Note Number: AN-5501
Authors: John Smith and Jane Smith
Last Modified Date: 2016/04/15
Overview
Packet flow errors printed in console/terminal as upper-case letters:
Underrun on Tx (“U”):
Samples not being produced by the host application fast enough. CPU governor or other power management not configured correctly.
Overrun on Rx (“O”):
Samples not being consumed by the host application fast enough. CPU governor or other power management not configured correctly.
Sequence Error on Tx (“S”):
Network hardware failure. Check host NIC, cable, switch, etc. Frame size might not work with the current NIC's MTU.
Dropped Packet on Rx (“D”):
Network hardware failure. Check host NIC, cable, switch, etc. PCIe bus on host cannot sustain throughput. CPU governor or other power management not configured correctly. Frame size might not work with the current NIC's MTU. Check "ethtool -S <interface>".
Late Packet on Tx (“L”):
Samples are not being produced by user's application fast enough. CPU governor or other power management not configured correctly. Incorrect/invalid time_spec provided. Usually on MIMO.
http://files.ettus.com/manual/page_usrp_x3x0_config.html
