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2026-04-18 - 04:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Sat Apr 18, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2551499270,23cyclictest12163-21ssh23:09:340
2552199260,1cyclictest6690-21ssh00:38:023
25516992623,0cyclictest151rcu_preempt23:47:111
25514992624,1cyclictest0-21swapper/021:30:160
25514992620,5cyclictest2739-1kworker/u9:000:39:540
2551499260,25cyclictest0-21swapper/022:21:160
2552199250,24cyclictest19767-21diskmemload00:08:573
2552199250,24cyclictest0-21swapper/323:24:533
2552199250,1cyclictest14864-21sh23:10:453
2551699252,22cyclictest22-21ksoftirqd/100:36:501
2551699251,23cyclictest10455-21idleruntime-cro00:10:011
2551699250,24cyclictest23390-21ssh22:48:171
2551699250,24cyclictest0-21swapper/122:34:331
2551699250,24cyclictest0-21swapper/122:07:101
2551699250,24cyclictest0-21swapper/121:12:241
25514992523,1cyclictest0-21swapper/023:50:020
25514992522,3cyclictest0-21swapper/022:19:530
25514992519,5cyclictest0-21swapper/021:20:070
25514992519,5cyclictest0-21swapper/000:11:490
2551499250,24cyclictest19767-21diskmemload22:48:590
2551499250,24cyclictest10692-21apt-get19:45:030
2551499250,24cyclictest0-21swapper/023:30:390
2551499250,24cyclictest0-21swapper/022:32:110
2551499250,24cyclictest0-21swapper/022:28:580
2551499250,24cyclictest0-21swapper/021:12:550
2551499250,1cyclictest29478-21apt-get22:54:530
2551499250,0cyclictest0-21swapper/022:07:340
2551499250,0cyclictest0-21swapper/000:30:210
2552199240,23cyclictest3911-21apt-get19:34:533
2552199240,23cyclictest0-21swapper/300:25:363
25520992424,0cyclictest0-21swapper/200:24:392
25520992420,4cyclictest0-21swapper/223:18:022
25520992419,4cyclictest0-21swapper/222:08:252
2552099240,23cyclictest14229-21grep19:50:022
2552099240,23cyclictest0-21swapper/221:52:012
2552099240,1cyclictest1834-21ssh00:33:272
25516992424,0cyclictest0-21swapper/100:12:431
25516992423,1cyclictest19767-21diskmemload22:57:381
2551699242,21cyclictest22-21ksoftirqd/123:19:211
2551699240,2cyclictest12065-21grep22:05:011
2551699240,24cyclictest0-21swapper/123:33:161
2551699240,0cyclictest0-21swapper/123:42:031
25514992423,1cyclictest17863-21diskmemload23:45:410
25514992421,3cyclictest62550irq/127-eno121:51:150
25514992421,2cyclictest0-21swapper/023:59:330
25514992420,3cyclictest19767-21diskmemload21:41:220
25514992419,4cyclictest19767-21diskmemload22:41:290
2551499240,23cyclictest17801-21taskset00:16:330
2551499240,0cyclictest19767-21diskmemload00:09:180
2551499240,0cyclictest0-21swapper/023:24:230
2551499240,0cyclictest0-21swapper/023:16:020
2551499240,0cyclictest0-21swapper/021:28:450
2551499240,0cyclictest0-21swapper/021:16:550
2551499240,0cyclictest0-21swapper/000:26:170
25521992323,0cyclictest0-21swapper/323:56:183
25521992323,0cyclictest0-21swapper/321:55:303
25521992323,0cyclictest0-21swapper/300:15:573
25521992323,0cyclictest0-21swapper/300:13:203
25521992322,1cyclictest30752-21kworker/u8:221:20:353
25521992322,1cyclictest3031-21ssh00:03:363
25521992322,1cyclictest19767-21diskmemload22:18:013
25521992322,1cyclictest19767-21diskmemload00:21:183
25521992320,2cyclictest24410-21ssh21:46:243
25521992320,2cyclictest12774-21ssh22:05:073
2552199230,23cyclictest0-21swapper/323:16:413
2552199230,23cyclictest0-21swapper/323:03:223
2552199230,23cyclictest0-21swapper/322:00:263
2552199230,22cyclictest3436-21ssh21:25:183
2552199230,22cyclictest27335-21sh22:51:313
2552199230,22cyclictest13563-21sh22:38:513
2552199230,22cyclictest11083-21ssh21:34:233
2552199230,0cyclictest19767-21diskmemload23:48:143
2552199230,0cyclictest0-21swapper/321:40:403
2552199230,0cyclictest0-21swapper/300:32:023
25520992323,0cyclictest0-21swapper/223:29:322
25520992323,0cyclictest0-21swapper/222:45:162
25520992323,0cyclictest0-21swapper/222:35:282
25520992323,0cyclictest0-21swapper/221:19:072
25520992321,1cyclictest2732-21awk21:25:002
25520992321,1cyclictest22907-21sh22:15:052
25520992320,2cyclictest2913-21ssh23:31:102
25520992320,2cyclictest18656-21ssh22:11:252
25520992320,2cyclictest16133-21latency_hist00:15:012
2552099230,2cyclictest15486-21ssh23:44:532
2552099230,23cyclictest0-21swapper/222:43:232
2552099230,22cyclictest3696-21sh00:04:462
2552099230,22cyclictest30588-21munin-run20:25:012
2552099230,22cyclictest25029-21ssh23:54:012
2552099230,22cyclictest19767-21diskmemload23:05:272
2552099230,22cyclictest16925-21sh23:14:132
2552099230,22cyclictest0-21swapper/221:36:122
2552099230,0cyclictest0-21swapper/223:37:212
2552099230,0cyclictest0-21swapper/222:55:232
2552099230,0cyclictest0-21swapper/221:47:032
2552099230,0cyclictest0-21swapper/200:25:032
25516992323,0cyclictest0-21swapper/123:10:101
25516992323,0cyclictest0-21swapper/123:08:121
25516992323,0cyclictest0-21swapper/122:13:301
25516992323,0cyclictest0-21swapper/119:54:521
25516992323,0cyclictest0-21swapper/100:01:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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