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2025-04-03 - 15:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot4s.osadl.org (updated Thu Apr 03, 2025 00:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3886562995045,3cyclictest4095940-21kworker/u8:4+flush-259:023:20:000
3886564994541,3cyclictest3939429-21kworker/u8:0+flush-259:020:00:001
3886569994437,5cyclictest3000860-21systemd-journal22:25:002
3886574994138,2cyclictest4111531-21kworker/u8:1+events_unbound23:30:343
3886574994138,2cyclictest4095940-21kworker/u8:4+events_unbound23:40:163
3886564994136,3cyclictest4095940-21kworker/u8:4+flush-259:023:10:111
3886574994034,4cyclictest4112149-21latency_hist23:10:003
3886564994035,3cyclictest4024188-21/usr/sbin/munin21:20:181
3886574993936,2cyclictest4150535-21kworker/u8:3+flush-259:023:55:163
3886574993835,2cyclictest4079329-21kworker/u8:0+flush-259:022:30:123
3886574993835,2cyclictest4040277-21kworker/u8:1+flush-259:022:40:163
3886564993834,2cyclictest3859426-21kworker/u8:3+events_unbound20:15:001
3886569993727,5cyclictest4095919-21latency_hist22:50:012
3886574993532,2cyclictest4111531-21kworker/u8:1+events_unbound00:30:203
3886574993532,2cyclictest3950846-21kworker/u8:1+flush-259:020:15:263
3886574993330,2cyclictest4051653-21kworker/u8:3+events_unbound23:00:193
3886574993330,2cyclictest3859426-21kworker/u8:3+events_unbound20:50:203
3886574993326,3cyclictest4095940-21kworker/u8:4+events_unbound23:20:223
3886562993326,5cyclictest4128780-21latency_hist23:30:000
3886574993230,2cyclictest4150535-21kworker/u8:3+flush-259:000:10:163
3886574993230,2cyclictest3875725-21kworker/u8:0+flush-259:019:35:163
3886574993229,2cyclictest4112806-21kworker/u8:2+events_unbound23:10:203
3886574993229,2cyclictest3912922-21kworker/u8:1+events_unbound19:45:223
3886574993229,2cyclictest3859426-21kworker/u8:3+events_unbound19:10:253
3886564993225,5cyclictest3929534-21base6419:50:021
3886562993227,4cyclictest4095940-21kworker/u8:4+flush-259:023:14:590
3886574993128,2cyclictest4172013-21kworker/u8:4+events_unbound00:35:243
3886574993128,2cyclictest3966260-21kworker/u8:0+events_unbound20:40:163
3886564993127,3cyclictest4095940-21kworker/u8:4+flush-259:023:40:181
3886564993125,4cyclictest4122948-21latency_hist23:20:001
3886574993027,2cyclictest4111531-21kworker/u8:1+flush-259:023:50:113
3886574993027,2cyclictest3859426-21kworker/u8:3+events_unbound19:40:143
3886574993026,3cyclictest3997760-21apt-get20:55:123
3886564993027,2cyclictest3950846-21kworker/u8:1+flush-259:020:15:161
3886574992926,3cyclictest4029769-21kworker/u8:3+flush-259:021:30:153
3886574992926,2cyclictest4095940-21kworker/u8:4+events_unbound23:15:143
3886574992926,2cyclictest3912922-21kworker/u8:1+flush-259:019:50:253
3886574992926,2cyclictest3902920-21kworker/u8:2+events_unbound19:25:183
3886574992923,5cyclictest3971458-21latency_hist20:30:003
3886569992926,2cyclictest4150535-21kworker/u8:3+flush-259:000:10:102
3886564992926,2cyclictest3976897-21kworker/u8:2+flush-259:020:35:151
3886564992926,2cyclictest3859426-21kworker/u8:3+flush-259:019:40:251
3886564992925,3cyclictest3929575-21kworker/u8:4+flush-259:020:05:161
3886564992922,5cyclictest4159909-21ntpq00:00:231
3886562992924,3cyclictest4057509-21/usr/sbin/munin22:00:200
3886574992826,2cyclictest3966260-21kworker/u8:0+flush-259:020:35:263
3886574992825,2cyclictest4095940-21kworker/u8:4+flush-259:000:00:253
3886569992825,2cyclictest3902920-21kworker/u8:2+flush-259:019:25:172
3886564992825,2cyclictest3875725-21kworker/u8:0+flush-259:019:30:261
3886562992824,3cyclictest4145379-21apt-get23:50:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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