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2026-06-08 - 16:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 100 highest latencies:
System rack3slot6s.osadl.org (updated Mon Jun 08, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
60522117106,6sleep10-21swapper/107:06:151
60862116105,6sleep00-21swapper/007:06:420
6248210583,17sleep20-21swapper/207:08:492
6104210285,12sleep30-21swapper/307:06:573
312342700,1sleep10-21swapper/111:38:001
192142670,1sleep019216-21cpuspeed_turbos10:50:120
297692270,0sleep30-21swapper/308:05:173
169332260,0sleep30-21swapper/311:57:103
169332260,0sleep30-21swapper/311:57:103
111722260,0sleep10-21swapper/111:15:511
637099221,19cyclictest0-21swapper/310:10:103
636799220,2cyclictest0-21swapper/007:50:100
281662220,1sleep028167-21fschecks_count09:15:140
636999218,12cyclictest0-21swapper/211:45:132
636799210,2cyclictest0-21swapper/007:40:120
6370992016,2cyclictest0-21swapper/307:55:123
636999200,18cyclictest0-21swapper/208:35:112
637099193,4cyclictest32689-21hostname12:15:123
6368991916,2cyclictest32732-21kworker/u8:012:36:041
6368991916,2cyclictest31577-21kworker/u8:211:30:041
6368991916,2cyclictest26008-21kworker/u8:010:57:051
6368991916,2cyclictest16895-21kworker/u8:212:24:051
636899190,17cyclictest0-21swapper/109:55:131
6367991914,3cyclictest32461-21ssh09:20:110
637099181,15cyclictest0-21swapper/311:43:073
6368991815,2cyclictest8820-21kworker/u8:009:39:031
6368991815,2cyclictest8820-21kworker/u8:009:30:051
6368991815,2cyclictest4711-21kworker/u8:011:54:041
6368991815,2cyclictest4711-21kworker/u8:011:54:041
6368991815,2cyclictest31577-21kworker/u8:211:43:031
6368991815,2cyclictest31577-21kworker/u8:211:24:051
6368991815,2cyclictest24640-21kworker/u8:109:50:011
6368991815,2cyclictest12448-21kworker/u8:108:48:041
636899180,13cyclictest0-21swapper/109:28:011
637099172,13cyclictest0-21swapper/307:49:043
6370991712,3cyclictest0-21swapper/312:20:213
637099171,14cyclictest990-21irqstats11:05:163
6368991714,2cyclictest8820-21kworker/u8:009:44:041
6368991714,2cyclictest31577-21kworker/u8:211:06:041
6368991714,2cyclictest2846-21kworker/u8:010:01:031
6368991714,2cyclictest24457-21kworker/u8:108:18:041
6368991714,2cyclictest18761-21kworker/u8:007:50:041
6368991714,2cyclictest12896-21kworker/u8:010:10:041
637099162,2cyclictest0-21swapper/310:54:063
637099162,12cyclictest0-21swapper/309:25:473
6370991613,2cyclictest381ktimersoftd/310:43:403
6370991613,2cyclictest0-21swapper/311:29:303
6370991613,2cyclictest0-21swapper/309:47:573
6370991613,2cyclictest0-21swapper/308:50:193
637099161,13cyclictest28456-21ssh09:15:163
637099161,13cyclictest0-21swapper/310:55:163
637099160,14cyclictest0-21swapper/310:35:123
637099160,14cyclictest0-21swapper/310:02:163
6369991611,3cyclictest0-21swapper/211:40:092
6368991613,2cyclictest4711-21kworker/u8:012:08:041
6368991613,2cyclictest32732-21kworker/u8:012:29:051
6368991613,2cyclictest30169-21kworker/u8:009:23:041
6368991613,2cyclictest28231-21kworker/u8:111:49:041
6368991613,2cyclictest27506-21kworker/u8:112:12:051
6368991613,2cyclictest27350-21kworker/u8:010:29:041
6368991613,2cyclictest26008-21kworker/u8:011:03:041
6368991613,2cyclictest24457-21kworker/u8:108:11:041
6368991613,2cyclictest24229-21kworker/u8:209:14:001
6368991613,2cyclictest18781-21kworker/u8:110:22:041
6368991613,2cyclictest16895-21kworker/u8:212:03:041
6368991613,2cyclictest16895-21kworker/u8:212:03:041
6368991613,2cyclictest1421-21kworker/u8:107:18:011
6368991613,2cyclictest13944-21kworker/u8:210:34:041
6367991611,3cyclictest0-21swapper/011:25:590
637099154,10cyclictest0-21swapper/311:15:023
637099152,12cyclictest0-21swapper/312:12:073
637099151,3cyclictest29917-21ssh09:51:173
6370991512,2cyclictest22756-21diskmemload12:39:203
6370991510,3cyclictest0-21swapper/310:20:133
6370991510,3cyclictest0-21swapper/308:14:593
637099150,13cyclictest4149-21sshd10:34:123
637099150,13cyclictest22756-21diskmemload11:00:553
637099150,13cyclictest0-21swapper/307:10:183
636999151,3cyclictest8545-21ssh09:29:032
6369991510,3cyclictest0-21swapper/209:15:112
636999150,13cyclictest0-21swapper/212:19:592
636999150,13cyclictest0-21swapper/211:37:392
636999150,13cyclictest0-21swapper/210:27:032
6368991512,2cyclictest5876-21kworker/u8:008:35:041
6368991512,2cyclictest31577-21kworker/u8:211:26:041
6368991512,2cyclictest30169-21kworker/u8:009:19:041
6368991512,2cyclictest26994-21kworker/u8:208:02:041
6368991512,2cyclictest18761-21kworker/u8:007:58:041
6368991512,2cyclictest18761-21kworker/u8:007:48:041
6368991512,2cyclictest10658-21kworker/u8:207:37:041
636899151,12cyclictest22756-21diskmemload10:08:031
636899150,13cyclictest19744-21memory10:50:161
636899150,13cyclictest0-21swapper/111:12:171
636799152,7cyclictest0-21swapper/010:00:010
636799151,3cyclictest1637-21ssh12:15:540
636799150,13cyclictest0-21swapper/012:07:330
77142140,11sleep20-21swapper/210:37:222
637099149,3cyclictest0-21swapper/309:55:173
6370991411,2cyclictest0-21swapper/312:30:373
6370991411,2cyclictest0-21swapper/311:46:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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