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2026-06-23 - 02:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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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, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack5slot4s.osadl.org (updated Tue Jun 23, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4431312820,3sleep375-21kworker/3:1-events19:55:383
391930996761,4cyclictest582762-21gpgv22:20:012
391926996661,3cyclictest3759298-21kworker/u8:2+events_unbound19:15:381
391926996660,4cyclictest423831-21kworker/u8:1+flush-8:020:00:371
391926996458,5cyclictest502672-21kworker/u8:0+events_unbound21:05:351
391926996457,4cyclictest349801-21kworker/u8:0+events_unbound19:40:011
391926996452,9cyclictest666987-21ntpq23:40:331
391926996358,3cyclictest527777-21kworker/u8:1+flush-8:021:50:351
391926996257,3cyclictest468564-21kworker/u8:3+events_unbound22:30:181
391926996256,5cyclictest642739-21kworker/u8:1+events_unbound23:55:331
391926996157,3cyclictest423831-21kworker/u8:1+events_unbound20:20:331
391926996155,4cyclictest518033-21kworker/u8:2+flush-8:021:25:211
391926996155,4cyclictest468564-21kworker/u8:3+flush-8:023:30:321
391926996154,5cyclictest502672-21kworker/u8:0+flush-8:021:00:361
391926996154,4cyclictest423831-21kworker/u8:1+events_unbound20:05:221
391930996054,4cyclictest633026-21gpgv23:10:012
391926996055,4cyclictest468564-21kworker/u8:3+events_unbound20:50:391
391926996055,4cyclictest468564-21kworker/u8:3+events_unbound20:50:381
391926996055,4cyclictest423831-21kworker/u8:1+events_unbound19:45:201
391926996055,3cyclictest642739-21kworker/u8:1+flush-8:000:15:211
391926996053,4cyclictest448755-21kworker/u8:2+events_unbound20:40:241
391926995948,8cyclictest463385-21latency_hist20:20:011
391926995852,4cyclictest557648-21kworker/u8:2+flush-8:022:45:331
391923995847,8cyclictest477316-21ntpq20:30:330
391926995751,5cyclictest468564-21kworker/u8:3+flush-8:023:00:211
391923995747,7cyclictest602100-21ntpq22:35:330
391926995651,4cyclictest518033-21kworker/u8:2+events_unbound21:20:351
391926995651,4cyclictest518033-21kworker/u8:2+events_unbound21:20:341
391926995650,4cyclictest473526-21kworker/u8:1+flush-8:021:10:401
391923995650,4cyclictest423831-21kworker/u8:1+flush-8:020:05:360
391926995550,4cyclictest653220-21kworker/u8:2+flush-8:023:50:301
391926995547,6cyclictest683042-21/usr/sbin/munin00:00:331
391923995548,4cyclictest468564-21kworker/u8:3+flush-8:020:35:350
391926995450,3cyclictest642739-21kworker/u8:1+flush-8:023:20:321
391926995448,4cyclictest607988-21kworker/u8:0+flush-8:022:55:221
391926995447,5cyclictest642739-21kworker/u8:1+flush-8:000:30:311
391926995444,7cyclictest437801-21ntpq19:50:341
6852012530,4chrt75-21kworker/3:1-events00:00:273
391926995349,3cyclictest575760-21kworker/u8:1+events_unbound22:15:231
391926995347,4cyclictest448755-21kworker/u8:2+events_unbound20:45:331
391926995346,5cyclictest575760-21kworker/u8:1+events_unbound22:40:341
391926995345,6cyclictest468564-21kworker/u8:3+events_unbound22:35:031
391926995248,3cyclictest537288-21kworker/u8:0+flush-8:021:40:221
391926995246,4cyclictest653220-21kworker/u8:2+flush-8:000:25:201
391926995146,4cyclictest557648-21kworker/u8:2+events_unbound22:05:251
391926995146,3cyclictest3759298-21kworker/u8:2+events_unbound19:20:251
391926995145,4cyclictest518033-21kworker/u8:2+events_unbound21:30:311
391926995144,5cyclictest349801-21kworker/u8:0+events_unbound20:10:361
391926995143,6cyclictest557648-21kworker/u8:2+flush-8:021:55:341
391926995136,5cyclictest642739-21kworker/u8:1+flush-8:023:25:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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