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2026-03-17 - 14:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Tue Mar 17, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2585521190,0sleep00-21swapper/010:22:230
769829380,9sleep00-21swapper/007:05:330
591528874,10sleep20-21swapper/207:05:112
799828168,9sleep30-21swapper/307:09:263
800127858,16sleep10-21swapper/107:09:271
260352650,0sleep30-21swapper/310:41:383
254322570,0sleep20-21swapper/209:24:432
8132993113,17cyclictest32-21ksoftirqd/211:38:592
813099280,27cyclictest0-21swapper/110:23:461
813099260,23cyclictest32177-21pmu-power09:05:221
8132992520,1cyclictest32-21ksoftirqd/212:19:592
813099240,1cyclictest0-21swapper/110:00:111
8132992321,1cyclictest0-21swapper/210:10:122
8132992320,2cyclictest32-21ksoftirqd/209:45:162
812599230,1cyclictest0-21swapper/008:20:120
813599222,19cyclictest18000-21kworker/3:107:26:193
813599220,20cyclictest18000-21kworker/3:107:32:023
813599220,20cyclictest18000-21kworker/3:107:20:263
812599220,2cyclictest0-21swapper/010:25:150
813599210,13cyclictest29748-21runrttasks09:26:333
8132992116,4cyclictest32-21ksoftirqd/209:28:062
813299210,21cyclictest0-21swapper/209:35:382
8130992119,2cyclictest0-21swapper/112:34:471
813099210,3cyclictest0-21swapper/111:27:011
813099210,21cyclictest0-21swapper/109:24:271
813099210,1cyclictest644-21diskmemload12:14:551
813599200,19cyclictest0-21swapper/307:38:353
813299201,2cyclictest0-21swapper/209:10:122
8130992020,0cyclictest0-21swapper/109:51:451
813099200,20cyclictest0-21swapper/112:26:401
812599200,17cyclictest0-21swapper/011:43:420
813599190,2cyclictest0-21swapper/309:59:193
813599190,2cyclictest0-21swapper/309:59:183
8132991918,1cyclictest0-21swapper/212:06:282
813299190,18cyclictest0-21swapper/211:26:302
813099191,9cyclictest141rcu_preempt11:00:181
8130991917,1cyclictest0-21swapper/110:39:051
813099190,1cyclictest0-21swapper/110:05:131
8125991917,2cyclictest0-21swapper/012:13:530
8125991912,6cyclictest1790-21apache211:00:390
812599190,16cyclictest0-21swapper/009:56:200
812599190,16cyclictest0-21swapper/009:56:200
813599181,17cyclictest0-21swapper/311:06:233
813599180,17cyclictest1956-21kworker/3:210:25:033
8132991815,2cyclictest32-21ksoftirqd/210:23:582
813299181,1cyclictest0-21swapper/209:15:502
8130991815,2cyclictest55850irq/129-enp2s0-10:15:431
8130991815,2cyclictest0-21swapper/108:05:231
8130991815,2cyclictest0-21swapper/108:05:221
812599189,2cyclictest4904-21cut12:25:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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