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2026-05-09 - 03:59

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 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 May 09, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2440899270,26cyclictest0-21swapper/321:35:363
24400992726,1cyclictest14163-21kworker/1:123:36:031
24408992623,3cyclictest0-21swapper/322:35:243
2440899260,25cyclictest26667-21sh22:14:363
2440899260,25cyclictest0-21swapper/321:30:013
2440899260,25cyclictest0-21swapper/300:21:383
2440899260,22cyclictest0-21swapper/322:30:463
24408992521,3cyclictest0-21swapper/300:32:253
24408992520,4cyclictest0-21swapper/323:46:413
24408992520,4cyclictest0-21swapper/322:01:453
24408992518,4cyclictest18043-21diskmemload00:16:573
24408992517,4cyclictest29830-21sh23:42:123
2440899250,24cyclictest0-21swapper/323:36:063
2440899250,24cyclictest0-21swapper/300:07:363
2440899250,21cyclictest29769-21ssh22:46:323
2440899250,1cyclictest0-21swapper/321:52:243
2440899250,0cyclictest18043-21diskmemload22:06:413
2440899250,0cyclictest0-21swapper/321:46:433
24405992523,1cyclictest0-21swapper/223:09:122
24405992519,1cyclictest12215-21ssh22:30:382
2440599250,24cyclictest18043-21diskmemload21:49:342
2440599250,24cyclictest0-21swapper/222:51:432
24400992524,0cyclictest0-21swapper/122:32:221
2439699250,24cyclictest0-21swapper/023:26:400
24408992422,1cyclictest0-21swapper/321:20:253
24408992420,3cyclictest18043-21diskmemload23:20:223
24408992420,3cyclictest0-21swapper/323:31:033
24408992419,4cyclictest18043-21diskmemload22:58:403
2440899240,24cyclictest0-21swapper/323:18:273
2440899240,24cyclictest0-21swapper/323:06:393
2440899240,23cyclictest18043-21diskmemload23:26:303
2440899240,23cyclictest0-21swapper/321:56:413
2440899240,0cyclictest0-21swapper/323:12:283
2440899240,0cyclictest0-21swapper/322:16:073
2440899240,0cyclictest0-21swapper/300:00:223
24405992423,0cyclictest0-21swapper/223:26:402
24405992422,1cyclictest7125-21sh21:28:012
2440599240,23cyclictest18043-21diskmemload23:36:402
2440599240,23cyclictest0-21swapper/220:41:382
24400992424,0cyclictest0-21swapper/122:42:581
24400992424,0cyclictest0-21swapper/100:07:421
2440099240,24cyclictest0-21swapper/122:14:361
2440099240,23cyclictest5157-21munin-plugin-st23:50:011
2440099240,23cyclictest3632-1kworker/u9:123:22:421
2440099240,23cyclictest18043-21diskmemload00:10:201
2440099240,23cyclictest0-21swapper/123:04:471
2440099240,23cyclictest0-21swapper/122:36:471
2440099240,0cyclictest18043-21diskmemload23:05:251
2440099240,0cyclictest0-21swapper/121:46:161
24396992424,0cyclictest18043-21diskmemload23:10:380
24396992423,1cyclictest18043-21diskmemload00:31:440
24396992422,1cyclictest0-21swapper/000:06:390
2439699240,24cyclictest0-21swapper/021:41:390
2439699240,24cyclictest0-21swapper/021:10:360
2439699240,24cyclictest0-21swapper/000:19:360
2439699240,23cyclictest6258-21ssh23:51:140
2439699240,23cyclictest14160-21sh00:25:530
2439699240,0cyclictest0-21swapper/022:19:260
24408992323,0cyclictest18043-21diskmemload22:50:263
24408992321,1cyclictest0-21swapper/322:20:143
24408992320,3cyclictest0-21swapper/300:26:363
24408992320,2cyclictest0-21swapper/323:55:383
24408992318,4cyclictest18043-21diskmemload21:41:403
2440899230,23cyclictest0-21swapper/322:40:173
2440899230,23cyclictest0-21swapper/322:26:243
2440899230,22cyclictest8587-21ssh23:51:573
2440899230,20cyclictest0-21swapper/323:02:003
2440899230,20cyclictest0-21swapper/321:10:543
2440899230,1cyclictest28287-21ssh00:37:273
2440899230,0cyclictest0-21swapper/321:17:173
24405992323,0cyclictest18043-21diskmemload23:30:382
24405992323,0cyclictest18043-21diskmemload22:23:292
24405992323,0cyclictest0-21swapper/223:51:132
24405992323,0cyclictest0-21swapper/221:56:042
24405992323,0cyclictest0-21swapper/221:36:212
24405992321,1cyclictest0-21swapper/200:36:402
24405992321,1cyclictest0-21swapper/200:06:472
24405992320,2cyclictest18043-21diskmemload21:50:312
24405992318,1cyclictest6067-21sh00:17:592
2440599230,2cyclictest30984-21ssh21:21:272
2440599230,2cyclictest27596-21sh22:43:542
2440599230,22cyclictest23009-21ssh00:32:532
2440599230,22cyclictest19728-21ssh21:11:312
2440599230,22cyclictest10933-21rm22:57:152
2440599230,1cyclictest606-21dbus-daemon21:35:002
2440599230,1cyclictest4505-21ssh23:20:572
2440599230,1cyclictest18043-21diskmemload23:49:002
2440599230,1cyclictest0-21swapper/222:08:492
2440599230,0cyclictest0-21swapper/222:17:062
24400992323,0cyclictest0-21swapper/123:57:461
24400992323,0cyclictest0-21swapper/123:52:061
24400992323,0cyclictest0-21swapper/123:25:121
24400992323,0cyclictest0-21swapper/122:21:151
24400992323,0cyclictest0-21swapper/121:54:391
24400992323,0cyclictest0-21swapper/121:35:211
24400992323,0cyclictest0-21swapper/121:25:301
24400992322,0cyclictest0-21swapper/122:45:051
24400992320,2cyclictest9061-21cstates22:56:411
2440099230,23cyclictest0-21swapper/121:11:141
2440099230,22cyclictest8841-21ssh00:21:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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