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2026-06-05 - 20:56

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 rack1slot2s.osadl.org (updated Fri Jun 05, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
950823727,0sleep30-21swapper/306:52:053
941023524,0sleep00-21swapper/006:50:580
940723526,0sleep20-21swapper/206:50:562
932523324,0sleep10-21swapper/106:49:591
97039960,0cyclictest29497-21kthreadcore09:43:512
97029960,0cyclictest0-21swapper/112:18:451
97009960,0cyclictest0-21swapper/011:38:510
35160,0ktimersoftd/30-21swapper/310:58:183
339960,0migration/38143-21sh09:52:473
339960,0migration/38043-21munin-node11:53:453
339960,0migration/37369-21sh09:30:053
339960,0migration/36627-21sh10:09:063
339960,0migration/35781-21sh11:49:503
339960,0migration/332375-21munin-node12:08:473
339960,0migration/332014-21aten_r1power_vo11:28:443
339960,0migration/331994-21sh09:07:123
339960,0migration/331074-21sh10:25:013
339960,0migration/330812-21sh11:26:233
339960,0migration/323220-21sh09:00:513
339960,0migration/316699-21sh09:58:403
339960,0migration/315683-21sh10:37:363
339960,0migration/315637-21sh09:56:143
259960,0migration/27826-21sh10:12:322
149960,0migration/023178-21sh11:01:420
149960,0migration/015350-21sh11:17:510
149960,0migration/014494-21sh10:54:430
97039955,0cyclictest7963-21diskmemload09:01:072
97039955,0cyclictest0-21swapper/212:05:072
97039955,0cyclictest0-21swapper/211:32:382
97039955,0cyclictest0-21swapper/211:13:142
97039955,0cyclictest0-21swapper/208:53:432
97039954,0cyclictest14756-21awk08:33:482
97039950,0cyclictest0-21swapper/211:26:102
97039950,0cyclictest0-21swapper/211:19:422
97039950,0cyclictest0-21swapper/210:17:542
97039950,0cyclictest0-21swapper/209:09:292
97029954,0cyclictest14215-21ssh10:13:531
97029950,0cyclictest0-21swapper/111:03:241
97029950,0cyclictest0-21swapper/109:20:171
97029950,0cyclictest0-21swapper/109:03:341
97009955,0cyclictest0-21swapper/011:09:220
97009955,0cyclictest0-21swapper/010:38:570
97009950,0cyclictest0-21swapper/012:18:160
97009950,0cyclictest0-21swapper/012:18:160
97009950,0cyclictest0-21swapper/009:14:080
97009950,0cyclictest0-21swapper/008:59:560
339950,0migration/38108-21kthreadcore07:38:513
339950,0migration/38087-21cpuspeed_turbos11:13:473
339950,0migration/36834-21taskset08:26:593
339950,0migration/36823-21mdstat08:48:513
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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