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2026-01-05 - 07:48

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 50 highest latencies:
System rack0slot4s.osadl.org (updated Mon Jan 05, 2026 00:46:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5335102382344,13sleep120-21swapper/1219:07:514
5334572363327,13sleep30-21swapper/319:07:109
5333862353334,12sleep80-21swapper/819:06:1114
5335862352330,14sleep110-21swapper/1119:08:553
5334502352333,12sleep130-21swapper/1319:07:055
5302052351331,13sleep60-21swapper/619:05:0512
5335392350330,13sleep70-21swapper/719:08:1913
5333752349329,13sleep140-21swapper/1419:06:016
5334102348328,13sleep90-21swapper/919:06:2815
5336142347327,13sleep50-21swapper/519:09:2211
5335082347338,6sleep100-21swapper/1019:07:502
5334242347325,14sleep40-21swapper/419:06:3910
5333572346324,14sleep150-21swapper/1519:05:467
5333342346326,13sleep00-21swapper/019:05:310
5334552344324,13sleep10-21swapper/119:07:091
5335942341321,13sleep20-21swapper/219:09:028
534054994242,0cyclictest0-21swapper/1422:28:226
534054994242,0cyclictest0-21swapper/1422:16:286
534054994242,0cyclictest0-21swapper/1421:57:206
534054994040,0cyclictest0-21swapper/1421:11:506
534054994040,0cyclictest0-21swapper/1400:13:316
534021993930,5cyclictest722028-21kworker/u32:2+events_unbound23:20:249
534054993838,0cyclictest0-21swapper/1400:38:386
534054993838,0cyclictest0-21swapper/1400:38:386
534032993830,4cyclictest583560-21ntpq20:05:2013
534032993826,5cyclictest765-21systemd-journal19:46:1213
534054993737,0cyclictest0-21swapper/1423:42:046
534054993636,0cyclictest0-21swapper/1422:14:326
534054993636,0cyclictest0-21swapper/1422:01:166
534054993636,0cyclictest0-21swapper/1421:39:096
534054993636,0cyclictest0-21swapper/1421:39:096
534054993636,0cyclictest0-21swapper/1420:19:406
534054993636,0cyclictest0-21swapper/1419:41:006
534054993636,0cyclictest0-21swapper/1419:16:376
534048993624,6cyclictest0-21swapper/1220:57:444
534045993636,0cyclictest0-21swapper/1119:10:143
534054993535,0cyclictest0-21swapper/1423:19:286
534054993535,0cyclictest0-21swapper/1419:46:326
534054993434,0cyclictest0-21swapper/1423:21:286
534054993434,0cyclictest0-21swapper/1420:01:526
534054993434,0cyclictest0-21swapper/1419:28:536
534054993434,0cyclictest0-21swapper/1419:21:476
53403299341,33cyclictest720872-21ntpq22:50:2013
53403299340,30cyclictest0-21swapper/722:00:2613
53405899330,1cyclictest0-21swapper/1520:55:167
534054993333,0cyclictest0-21swapper/1400:09:046
534054993332,1cyclictest1491rcuc/1420:25:526
534048993333,0cyclictest0-21swapper/1219:10:144
53403299330,29cyclictest0-21swapper/723:49:4213
53403299330,29cyclictest0-21swapper/719:56:5013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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