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  1. OpenShift Bugs
  2. OCPBUGS-45266

Too many nmea messages on E810 card T-GM

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      Description of problem:

      Customer case https://access.redhat.com/support/cases/#/case/03909478

      There are many GPS messages appearing in the log, for example:

      2024-12-03T11:16:45.548545287Z ts2phc[5168.608]: [ts2phc.0.config:7] nmea sentence: GNRMC,111645.00,A,3553.86691,N,07852.73887,W,0.000,,031224,,,A,V
2024-12-03T11:16:45.548545287Z ts2phc[5168.608]: [ts2phc.0.config:7] nmea sentence: GNVTG,,T,,M,0.000,N,0.000,K,A
2024-12-03T11:16:45.548545287Z ts2phc[5168.608]: [ts2phc.0.config:7] nmea sentence: GNGGA,111645.00,3553.86691,N,07852.73887,W,1,07,99.99,97.0,M,-34.2,M,,
2024-12-03T11:16:45.548545287Z ts2phc[5168.608]: [ts2phc.0.config:7] nmea sentence: GNGSA,A,3,15,24,27,10,32,18,23,,,,,,99.99,99.99,99.99,1
2024-12-03T11:16:45.549203321Z ts2phc[5168.608]: [ts2phc.0.config:7] nmea sentence: GNGSA,A,3,,,,,,,,,,,,,99.99,99.99,99.99,5
2024-12-03T11:16:45.549203321Z ts2phc[5168.608]: [ts2phc.0.config:7] nmea sentence: GPGSV,2,1,08,10,32,306,34,13,03,050,30,15,33,053,45,18,63,181,44,1
2024-12-03T11:16:45.549203321Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GPGSV,2,2,08,23,65,353,46,24,58,098,45,27,14,292,38,32,23,246,42,1
2024-12-03T11:16:45.549203321Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GPGSV,1,1,02,05,03,105,,08,01,321,,0
2024-12-03T11:16:45.550538460Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GNGST,111645.00,8.3,2.3,1.8,135,1.3,1.3,1.3
2024-12-03T11:16:45.550538460Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GNZDA,111645.00,03,12,2024,00,00
2024-12-03T11:16:45.550538460Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GNGBS,111645.00,1.3,1.3,1.3,,,,,,
2024-12-03T11:16:45.550538460Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GPZDA,,00,01,1900,00,00
2024-12-03T11:16:45.550538460Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GPGGA,,,S,,W,7,07,,,M,,M,,
2024-12-03T11:16:45.550538460Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GPRMC,,A,,S,,W,,,,,
2024-12-03T11:16:45.550538460Z ts2phc[5168.609]: [ts2phc.0.config:7] nmea sentence: GPGSA,A,3,10,15,18,23,24,27,32,,,,,,,,

      Most of them are not needed and create a lot of log volume and compute load on ts2phc. Some of them (GPGSV) depend on the number of the received satellites, and were proven to disrupt normal ts2phc operation if many satellites are visible.

      The NMEA messages must be reduced to the essential ones, namely:

      nmea sentence: GNRMC,094511.00,A,3553.86724,N,07852.73971,W,0.000,,031224,,,A,V
nmea sentence: GNGGA,094511.00,3553.86724,N,07852.73971,W,1,07,99.99,104.3,M,-34.2,M,,

              vgrinber@redhat.com Vitaly Grinberg
              vgrinber@redhat.com Vitaly Grinberg
              Hen Shay Hassid Hen Shay Hassid
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