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2026-09-05 - 07:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack0slot3s.osadl.org (updated Sat Sep 05, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7471152280216,32sleep50-21swapper/518:57:115
7471372266218,39sleep30-21swapper/318:57:253
7470652266219,16sleep10-21swapper/118:56:241
7470372260215,16sleep60-21swapper/618:56:046
7470622258217,32sleep70-21swapper/718:56:227
7471542253212,17sleep20-21swapper/218:57:402
7468712244220,16sleep00-21swapper/018:53:440
7469472243219,16sleep40-21swapper/418:54:474
74752899360,35cyclictest0-21swapper/721:04:597
747519993534,1cyclictest0-21swapper/500:11:335
74751099350,34cyclictest0-21swapper/323:27:123
747523993432,1cyclictest1390-21snmpd22:56:346
747505993432,1cyclictest0-21swapper/221:38:402
747505993432,1cyclictest0-21swapper/221:38:402
747514993230,2cyclictest0-21swapper/421:36:204
747514993129,2cyclictest0-21swapper/400:24:454
747528993014,15cyclictest1390-21snmpd19:14:537
747514993027,2cyclictest1390-21snmpd23:34:534
747510993029,1cyclictest0-21swapper/321:19:543
747501993029,1cyclictest0-21swapper/120:05:511
747528992928,1cyclictest1390-21snmpd20:57:427
747528992928,1cyclictest0-21swapper/723:35:437
747519992927,1cyclictest0-21swapper/519:55:205
747519992926,2cyclictest1390-21snmpd22:47:395
747510992928,1cyclictest0-21swapper/300:30:473
74750599280,24cyclictest0-21swapper/222:35:502
747501992825,2cyclictest1390-21snmpd23:02:121
747496992826,1cyclictest1390-21snmpd19:58:140
74751999273,23cyclictest641irq_work/519:44:435
74751499270,25cyclictest0-21swapper/400:30:144
747501992726,1cyclictest0-21swapper/120:47:291
74752899260,25cyclictest0-21swapper/719:46:197
74752399260,22cyclictest0-21swapper/621:48:466
74752399260,22cyclictest0-21swapper/621:48:466
74751999260,1cyclictest0-21swapper/523:56:195
74751099260,22cyclictest0-21swapper/319:15:023
74749699260,22cyclictest0-21swapper/023:00:510
747528992518,5cyclictest0-21swapper/723:30:417
747528992518,5cyclictest0-21swapper/719:39:367
747523992518,5cyclictest0-21swapper/621:12:056
747519992524,1cyclictest0-21swapper/519:31:485
747514992521,3cyclictest1390-21snmpd23:58:184
747510992518,5cyclictest0-21swapper/319:00:573
747501992521,3cyclictest1390-21snmpd19:38:301
74750199250,1cyclictest0-21swapper/121:27:401
747496992521,3cyclictest1390-21snmpd21:01:410
747496992521,3cyclictest1390-21snmpd00:17:430
747496992518,5cyclictest0-21swapper/023:58:290
747496992518,3cyclictest0-21swapper/023:29:580
74749699250,1cyclictest0-21swapper/019:10:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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