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2026-05-23 - 23:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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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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 100 highest latencies:
System rack0slot4s.osadl.org (updated Sat May 23, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30264752750,0sleep70-21swapper/722:42:1013
280013725956,2sleep50-21swapper/519:05:1411
280289999545,25cyclictest2779210-21thunderbird21:12:366
280237825149,1sleep20-21swapper/219:09:288
418998500,48rtkit-daemon0-21swapper/019:09:340
279893824847,0sleep10-21swapper/119:05:101
2802859994746,1cyclictest3077933-21kworker/u32:2+events_unbound23:32:238
280211724622,23sleep140-21swapper/1419:06:116
280289999458,24cyclictest2779210-21thunderbird23:57:226
280289999447,24cyclictest0-21swapper/1420:50:386
280289999446,25cyclictest2779210-21thunderbird21:01:376
2802859994443,1cyclictest2854245-21kworker/u32:3+events_unbound21:10:098
280289999437,25cyclictest0-21swapper/1422:40:286
2802859994342,1cyclictest2800894-21kworker/u32:4+flush-259:019:25:178
2802859994339,4cyclictest3125855-21kworker/u32:5+events_unbound00:17:538
2802859994339,2cyclictest2779210-21thunderbird22:17:178
2802859994310,2cyclictest2779309-21WRScene~ilder#100:01:478
280285999428,1cyclictest211rcu_preempt22:48:378
2802859994241,1cyclictest3045980-21kworker/u32:0+flush-259:023:16:098
2802859994241,1cyclictest2779210-21thunderbird20:35:258
2802859994234,8cyclictest2779210-21thunderbird22:04:138
280226024240,1sleep130-21swapper/1319:08:025
2802903994140,1cyclictest0-21swapper/1523:52:557
280285999418,30cyclictest2779210-21thunderbird22:59:198
2802859994140,1cyclictest3000099-21kworker/u32:0+flush-259:022:33:098
2802859994140,1cyclictest2779210-21thunderbird19:47:438
2802859994138,1cyclictest2779210-21thunderbird22:08:598
2802859994137,4cyclictest2779309-21WRScene~ilder#123:46:518
2802859994136,3cyclictest2779309-21WRScene~ilder#121:54:438
2802859994130,11cyclictest2740739-21Renderer20:57:298
2802903994037,0cyclictest211rcu_preempt23:32:357
280285999408,30cyclictest2779309-21WRScene~ilder#120:23:158
280285999408,29cyclictest0-21swapper/200:35:258
280285999408,29cyclictest0-21swapper/200:35:258
2802859994039,1cyclictest3045980-21kworker/u32:0+events_unbound23:25:178
2802859994039,1cyclictest2779210-21thunderbird23:02:058
2802859994039,1cyclictest2779210-21thunderbird22:53:318
2802859994039,1cyclictest2779210-21thunderbird19:32:458
2802859994034,2cyclictest211rcu_preempt00:22:058
280241124038,1sleep120-21swapper/1219:09:544
2802859993938,1cyclictest2779309-21WRScene~ilder#121:29:578
2802859993938,1cyclictest2779309-21WRScene~ilder#120:00:478
2802859993938,1cyclictest2779210-21thunderbird20:07:038
2802859993938,1cyclictest2779210-21thunderbird19:57:498
2802859993938,1cyclictest2779210-21thunderbird19:24:438
2802859993938,1cyclictest2779210-21thunderbird00:34:118
2802859993937,2cyclictest2779210-21thunderbird22:25:018
2802859993936,3cyclictest0-21swapper/223:22:098
2802859993935,3cyclictest2779309-21WRScene~ilder#121:36:598
2802859993935,3cyclictest2779309-21WRScene~ilder#121:36:598
280285999392,0cyclictest211rcu_preempt19:15:218
279892223936,2sleep80-21swapper/819:05:0114
2802903993838,0cyclictest0-21swapper/1523:05:557
2802903993837,1cyclictest2923385-21kworker/u32:4+events_unbound21:40:137
2802903993837,1cyclictest2923385-21kworker/u32:4+events_unbound21:40:137
2802899993814,11cyclictest0-21swapper/1419:22:466
280287599380,13cyclictest0-21swapper/721:34:3413
280285999388,28cyclictest3124817-21kworker/2:0-i915-unordered00:25:178
2802859993837,1cyclictest2779309-21WRScene~ilder#120:40:078
2802859993837,1cyclictest2779210-21thunderbird23:43:478
2802859993837,1cyclictest2779210-21thunderbird22:23:238
2802859993837,1cyclictest2779210-21thunderbird21:44:358
2802859993837,1cyclictest2779210-21thunderbird21:44:358
2802859993837,1cyclictest2779210-21thunderbird21:09:418
2802859993837,1cyclictest2779210-21thunderbird19:53:518
2802859993837,1cyclictest2740927-21Isolated12:05:318
2802859993835,3cyclictest2779231-21glean.dispatche23:57:298
280285999383,1cyclictest211rcu_preempt23:06:248
280231923836,1sleep90-21swapper/919:08:4715
280227523836,1sleep60-21swapper/619:08:1112
280220823836,1sleep40-21swapper/419:07:2110
2802903993737,0cyclictest0-21swapper/1522:23:197
280285999376,0cyclictest0-21swapper/219:44:398
2802859993736,1cyclictest2779210-21thunderbird23:54:138
2802859993735,2cyclictest2779309-21WRScene~ilder#121:30:038
2802859993735,2cyclictest2779210-21thunderbird22:39:188
2802859993735,2cyclictest2779210-21thunderbird20:13:118
2802859993735,2cyclictest2740694-21glean.dispatche23:39:218
2802859993734,1cyclictest2779210-21thunderbird21:00:198
2802903993636,0cyclictest0-21swapper/1522:41:157
2802903993636,0cyclictest0-21swapper/1522:13:337
2802903993635,1cyclictest2779210-21thunderbird00:05:157
2802889993636,0cyclictest0-21swapper/1221:37:374
2802889993636,0cyclictest0-21swapper/1221:37:374
2802878993636,0cyclictest0-21swapper/821:56:2314
2802878993635,1cyclictest3027074-21kworker/u32:3+events_unbound23:15:1714
2802863993636,0cyclictest0-21swapper/323:13:519
2802859993635,1cyclictest2779210-21thunderbird23:13:598
2802859993635,1cyclictest2779210-21thunderbird22:14:478
2802859993635,1cyclictest2779210-21thunderbird20:34:278
2802859993635,1cyclictest2779210-21thunderbird00:06:038
2802859993634,1cyclictest2779210-21thunderbird20:48:518
2802859993633,3cyclictest2779309-21WRScene~ilder#121:21:378
2802859993633,3cyclictest0-21swapper/222:40:438
2802859993633,1cyclictest2923385-21kworker/u32:4-xprtiod21:58:238
2802859993630,2cyclictest211rcu_preempt21:45:358
2802859993630,2cyclictest211rcu_preempt21:45:358
280233023633,2sleep30-21swapper/319:08:569
279893423634,1sleep150-21swapper/1519:05:087
2802903993535,0cyclictest0-21swapper/1519:33:157
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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