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2026-06-16 - 16:14

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 Jun 16, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2620121210,0sleep00-21swapper/009:50:300
2765829983,12sleep00-21swapper/007:09:120
2740229376,12sleep30-21swapper/307:05:523
2758129179,8sleep20-21swapper/207:08:122
2766928964,15sleep10-21swapper/107:09:201
27902550,0sleep30-21swapper/311:50:383
2780199240,24cyclictest0-21swapper/209:30:282
2779999232,1cyclictest0-21swapper/011:55:130
2780399220,13cyclictest225-21systemd-journal12:29:083
2780399220,0cyclictest0-21swapper/312:09:233
2780399220,0cyclictest0-21swapper/312:09:223
2780399210,12cyclictest3072-21date10:35:003
2780199210,20cyclictest0-21swapper/212:16:402
2780199210,16cyclictest0-21swapper/210:37:302
27800992119,1cyclictest25-21ksoftirqd/110:50:141
2780099210,2cyclictest141rcu_preempt09:20:221
2779999210,1cyclictest0-21swapper/009:16:330
27801992019,1cyclictest0-21swapper/210:59:042
2780199190,19cyclictest0-21swapper/211:13:092
2780199190,18cyclictest0-21swapper/209:43:272
2780099190,18cyclictest0-21swapper/110:12:111
2780399185,2cyclictest141rcu_preempt09:16:003
2780199180,1cyclictest0-21swapper/212:00:552
2780199180,16cyclictest0-21swapper/211:03:252
2780199180,16cyclictest0-21swapper/210:51:222
2780099180,18cyclictest0-21swapper/111:50:011
2780099180,17cyclictest0-21swapper/109:25:241
27799991818,0cyclictest0-21swapper/010:38:240
2780399175,5cyclictest14805-21apache_volume11:20:143
27801991713,3cyclictest0-21swapper/210:45:292
2780199170,3cyclictest0-21swapper/209:20:072
2780199170,17cyclictest0-21swapper/211:23:572
27799991716,1cyclictest13-21ksoftirqd/010:52:310
27803991615,1cyclictest0-21swapper/312:01:353
2780399160,1cyclictest0-21swapper/312:34:153
2780199168,1cyclictest32-21ksoftirqd/211:19:272
2780199161,1cyclictest0-21swapper/212:37:212
2780199160,2cyclictest0-21swapper/209:50:152
2780199160,14cyclictest0-21swapper/211:30:242
2780099160,16cyclictest0-21swapper/112:17:351
2779999160,1cyclictest0-21swapper/010:22:440
2779999160,16cyclictest0-21swapper/011:13:100
2780399158,6cyclictest39-21ksoftirqd/311:02:303
27803991514,1cyclictest0-21swapper/310:48:073
2780399151,14cyclictest0-21swapper/311:27:353
2780199151,0cyclictest141rcu_preempt10:42:172
2780099158,6cyclictest11572-21sed10:20:221
27800991513,1cyclictest0-21swapper/112:36:531
27800991512,2cyclictest241rcuc/109:40:591
2779999150,1cyclictest0-21swapper/010:00:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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