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2025-07-01 - 12:46

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 20 highest latencies:
System rackeslot4s.osadl.org (updated Tue Jul 01, 2025 00:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3740900995955,3cyclictest3730854-21kworker/u8:1+events_unbound19:22:033
3740900994441,2cyclictest3824425-21kworker/u8:3+events_unbound20:30:183
3740900994340,2cyclictest3964209-21kworker/u8:1+events_unbound23:15:223
3740900994037,2cyclictest3969580-21kworker/u8:2+events_unbound23:10:223
3740900994037,2cyclictest3834550-21kworker/u8:0+flush-259:020:55:203
3740895994035,4cyclictest3882027-21kworker/u8:0+flush-259:021:35:262
3740900993935,3cyclictest3897541-21kworker/u8:4+events_unbound22:30:193
3740900993832,2cyclictest3932995-21kworker/u8:0+events_unbound22:15:003
3740900993831,2cyclictest3907857-21kworker/u8:3+events_unbound21:55:183
3740900993734,2cyclictest3730854-21kworker/u8:1+flush-259:019:35:303
3740900993632,3cyclictest3932995-21kworker/u8:0+events_unbound22:20:283
3740900993630,4cyclictest3746189-21/usr/sbin/munin19:15:133
3740892993633,2cyclictest3782764-21kworker/u8:0+flush-259:020:05:161
3740900993532,2cyclictest3964209-21kworker/u8:1+flush-259:023:35:163
3740900993532,2cyclictest3834550-21kworker/u8:0+events_unbound21:15:263
3740900993532,2cyclictest3824425-21kworker/u8:3+flush-259:020:50:223
3740900993532,2cyclictest3793220-21kworker/u8:5+events_unbound20:20:253
3740900993532,2cyclictest3782764-21kworker/u8:0+flush-259:019:50:153
3740900993528,5cyclictest3902465-21latency_hist21:45:013
3740900993431,2cyclictest3882027-21kworker/u8:0+events_unbound21:30:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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