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2026-06-10 - 21:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Wed Jun 10, 2026 12:45:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
855420991234,115cyclictest0-21swapper/008:45:030
85542099112102,8cyclictest12-21ksoftirqd/011:35:030
855420999888,7cyclictest12-21ksoftirqd/008:10:010
855425997520,14cyclictest1-21systemd12:05:001
855425997418,21cyclictest901512-21ssh10:38:591
855425997417,16cyclictest926236-21ssh11:34:021
85543599731,67cyclictest861607-21diskmemload09:35:033
85543599731,67cyclictest861607-21diskmemload09:35:023
855425997218,15cyclictest952690-21ssh12:32:461
855425997218,15cyclictest952690-21ssh12:32:451
855435996913,13cyclictest275-21dbus-daemon07:55:013
855430996910,35cyclictest875927-21kworker/u8:310:25:022
855425996920,15cyclictest930440-21ssh11:43:211
855425996917,13cyclictest903921-21ssh10:44:211
855435996829,35cyclictest944591-21munin-plugin-st12:15:013
855435996829,32cyclictest860323-21cut08:45:013
855425996821,15cyclictest892207-21ssh10:18:001
855425996821,15cyclictest892207-21ssh10:18:001
855425996820,14cyclictest860828-21modprobe08:55:001
855425996819,15cyclictest918730-21ssh11:17:181
855425996816,20cyclictest863790-21ssh09:14:451
855420996854,11cyclictest275-21dbus-daemon12:30:010
855420996825,9cyclictest12-21ksoftirqd/009:20:410
855420996825,9cyclictest12-21ksoftirqd/009:20:410
855425996715,15cyclictest895598-21ssh10:25:061
855425996715,15cyclictest895598-21ssh10:25:061
855435996625,8cyclictest906569-21sed10:50:023
855435996617,12cyclictest275-21dbus-daemon09:45:023
85543599661,6cyclictest131rcu_preempt09:39:593
855425996617,15cyclictest873388-21ssh09:35:381
855425996616,15cyclictest928846-21munin-run11:40:011
855425996516,14cyclictest885830-21ssh10:03:471
855425996515,15cyclictest906877-21ssh10:50:301
85543599644,52cyclictest858472-21kworker/u8:308:15:023
85543599641,25cyclictest926804-21wc11:35:023
855425996417,13cyclictest895036-21ssh10:24:211
855420996422,36cyclictest875175-21sendmail09:39:590
855420996416,29cyclictest940921-21ssh12:06:290
855435996322,4cyclictest879817-21latency_hist09:50:023
855425996316,15cyclictest917333-21ssh11:14:211
855425996316,15cyclictest855621-21munin-run07:15:001
85542099633,9cyclictest121ksoftirqd/012:38:030
855435996222,10cyclictest37-21ksoftirqd/307:20:023
855435996221,5cyclictest919078-21sh11:18:053
855425996222,7cyclictest943194-21ssh12:11:351
855425996221,8cyclictest941190-21ssh12:07:051
855425996221,10cyclictest899023-21ssh10:33:101
855425996215,16cyclictest949660-21ssh12:25:471
855425996214,15cyclictest946428-21ssh12:18:541
85542099627,7cyclictest12-21ksoftirqd/012:14:030
855435996122,10cyclictest37-21ksoftirqd/311:54:523
855435996118,11cyclictest37-21ksoftirqd/307:50:023
855435996110,16cyclictest884821-1kworker/u9:110:29:593
855435996110,16cyclictest884821-1kworker/u9:110:29:583
855425996139,17cyclictest867403-21ssh09:22:321
855425996139,17cyclictest867403-21ssh09:22:311
855425996117,14cyclictest921437-21ssh11:23:151
855425996115,16cyclictest864214-21ssh09:15:181
85542099613,9cyclictest121ksoftirqd/009:35:000
85542099613,9cyclictest121ksoftirqd/009:35:000
85542099611,6cyclictest0-21swapper/011:07:250
85543599602,19cyclictest857969-21sendmail08:00:003
855435996019,12cyclictest37-21ksoftirqd/311:45:523
85542099602,7cyclictest121ksoftirqd/010:16:560
85542099602,7cyclictest121ksoftirqd/010:16:550
855435995939,15cyclictest1-21systemd12:05:003
855435995926,9cyclictest37-21ksoftirqd/310:59:533
855435995924,32cyclictest37-21ksoftirqd/309:00:023
855435995920,7cyclictest37-21ksoftirqd/311:57:513
855425995937,18cyclictest931656-21ssh11:45:381
855425995936,19cyclictest905181-21ssh10:46:531
855425995936,17cyclictest889061-21ssh10:10:431
855425995915,14cyclictest883454-21ssh09:58:291
855420995922,33cyclictest12-21ksoftirqd/009:44:160
855435995825,4cyclictest894331-21sh10:22:363
855435995823,10cyclictest37-21ksoftirqd/309:05:013
855430995848,6cyclictest849075-21kworker/2:010:15:352
855430995848,6cyclictest849075-21kworker/2:010:15:342
855425995837,17cyclictest947144-21ssh12:20:081
855425995837,17cyclictest947144-21ssh12:20:071
855420995851,3cyclictest0-21swapper/007:55:020
855420995825,16cyclictest904016-21ssh10:44:340
855420995818,9cyclictest12-21ksoftirqd/011:01:500
855435995724,5cyclictest884190-21latency_hist10:00:013
855435995720,9cyclictest37-21ksoftirqd/309:25:023
855435995720,9cyclictest37-21ksoftirqd/309:25:023
855425995745,9cyclictest955721-21ssh12:39:461
855425995745,9cyclictest877783-21ssh09:45:201
855425995741,13cyclictest922831-21ssh11:26:091
855425995739,14cyclictest914966-21ssh11:09:021
855425995735,18cyclictest912304-21ssh11:02:581
855425995714,15cyclictest861607-21diskmemload09:44:271
855425995714,14cyclictest936420-21ssh11:56:281
85542099579,24cyclictest16950irq/224-800000010:10:020
855420995720,32cyclictest16850irq/134-800000009:16:270
855435995628,26cyclictest37-21ksoftirqd/311:36:403
855435995623,4cyclictest885220-21sh10:02:143
855435995623,11cyclictest37-21ksoftirqd/310:39:073
855435995622,6cyclictest861607-21diskmemload10:51:113
855435995621,5cyclictest950480-21sh12:27:493
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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