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2026-07-26 - 01:30

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 Sat Jul 25, 2026 12:45:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2876316999127,46cyclictest2946906-21ssh11:26:070
2876316998418,6cyclictest16850irq/134-800000010:26:500
2876316998322,15cyclictest2920974-21ssh10:31:060
2876327998272,7cyclictest37-21ksoftirqd/309:40:013
2876316998226,14cyclictest2933665-21ssh10:58:170
2876321998023,19cyclictest2938426-21ssh11:08:181
2876316998025,13cyclictest2900362-21rm09:47:310
2876316998023,17cyclictest2923482-21ssh10:36:260
2876321997923,16cyclictest2898022-21ssh09:42:341
2876321997923,16cyclictest2898022-21ssh09:42:341
2876321997820,19cyclictest2878798-21cat07:55:021
2876316997828,33cyclictest2909729-21ssh10:07:220
2876316997827,47cyclictest2935914-21ssh11:02:520
2876316997827,46cyclictest2970036-21ssh12:15:390
2876321997723,20cyclictest2891442-21ssh09:28:441
287631699772,6cyclictest2908542-21munin-run10:05:010
2876316997725,47cyclictest16950irq/224-800000012:11:500
2876321997631,9cyclictest2892738-21ssh09:31:081
2876316997629,43cyclictest2914030-21ssh10:16:170
2876316997628,44cyclictest2925801-21ssh10:41:150
2876316997619,40cyclictest16850irq/134-800000012:37:030
2876321997523,15cyclictest2910273-21ssh10:08:321
2876321997521,20cyclictest2902005-21ssh09:50:511
2876316997529,29cyclictest2885186-21ssh09:15:070
287631699752,69cyclictest2974372-21unin-run12:25:000
2876316997522,5cyclictest364-21snmpd11:32:580
2876316997517,12cyclictest2940482-21ssh11:12:370
287631699751,70cyclictest0-21swapper/010:45:030
287631699751,5cyclictest2932039-21latency_hist10:55:000
2876321997426,8cyclictest2936861-21munin-run11:05:021
2876321997421,15cyclictest2945788-21ssh11:24:051
2876321997419,21cyclictest2948978-21ssh11:30:321
2876321997419,16cyclictest2920585-21ssh10:30:081
2876316997433,24cyclictest16850irq/134-800000011:59:410
2876316997427,43cyclictest2893387-21ssh09:32:450
2876316997425,44cyclictest16850irq/134-800000010:00:000
287631699741,69cyclictest2887962-21ssh09:21:060
287632599731,51cyclictest291rcuc/210:05:022
2876321997326,13cyclictest2915531-21ssh10:19:451
2876321997321,16cyclictest2965467-21ssh12:05:511
2876321997320,14cyclictest2959621-21ssh11:54:021
2876316997333,37cyclictest16950irq/224-800000009:00:000
2876316997330,38cyclictest3467602-21systemd-journal11:35:570
2876316997326,2cyclictest0-21swapper/009:51:370
2876316997324,3cyclictest0-21swapper/011:15:480
2876321997221,14cyclictest2899291-21ssh09:45:051
2876321997221,14cyclictest2883410-21ssh09:11:311
2876321997220,15cyclictest2948394-21ssh11:29:491
2876321997219,21cyclictest2970025-21ssh12:15:371
2876321997219,17cyclictest2979788-21ssh12:36:181
2876321997218,16cyclictest2952035-21sh11:37:231
2876321997218,15cyclictest2894713-21ssh09:35:221
2876316997229,38cyclictest16950irq/224-800000009:44:390
2876316997229,38cyclictest16950irq/224-800000009:44:390
2876316997225,14cyclictest2966406-21ssh12:08:130
2876316997225,14cyclictest2913187-21ssh10:14:500
2876316997219,12cyclictest2963881-21ssh12:02:410
287631699721,26cyclictest0-21swapper/011:20:470
2876321997122,17cyclictest2931946-21ssh10:54:501
2876321997121,14cyclictest2925745-21ssh10:41:061
2876321997116,17cyclictest2941022-21ssh11:13:551
2876316997124,14cyclictest2978439-21ssh12:33:340
2876316997120,11cyclictest2917153-21ssh10:23:010
2876316997117,12cyclictest2955251-21ssh11:44:490
2876321997022,16cyclictest2967879-21ssh12:11:081
2876321997021,15cyclictest2919736-21sh10:28:391
2876321997020,14cyclictest2954770-21ssh11:43:391
2876321997019,15cyclictest2932369-21ssh10:55:141
2876321997019,13cyclictest2906842-21ssh10:01:061
2876321997016,16cyclictest2974080-21ssh12:24:201
2876316997025,5cyclictest0-21swapper/011:49:420
2876316997025,5cyclictest0-21swapper/011:49:420
2876316997025,12cyclictest2958829-21ssh11:52:060
2876321996921,13cyclictest2961435-21sh11:57:431
2876321996917,16cyclictest2943357-21ssh11:18:561
2876321996915,16cyclictest2916017-21ssh10:20:241
2876316996920,15cyclictest2894847-21ssh09:35:400
2876321996817,15cyclictest2975407-21ssh12:26:571
2876321996715,20cyclictest2913096-21ssh10:14:391
2876316996728,32cyclictest2879937-21sendmail08:20:000
2876316996728,32cyclictest2879937-21sendmail08:20:000
287631699671,11cyclictest2939376-21sed11:10:020
2876321996620,15cyclictest2885602-21ssh09:16:121
287631699662,6cyclictest2884922-21munin-run09:15:000
2876321996525,14cyclictest364-21snmpd09:07:391
2876321996524,14cyclictest2956749-21sh11:47:541
2876321996524,14cyclictest2956749-21sh11:47:541
2876316996523,4cyclictest0-21swapper/009:28:430
2876321996417,17cyclictest2927873-21ssh10:45:401
2876316996414,8cyclictest309-21in:imuxsock08:35:020
2876321996322,10cyclictest0-21swapper/109:56:141
2876321996317,14cyclictest2924481-21ssh10:38:501
2876321996316,14cyclictest2977299-21ssh12:30:481
2876316996317,11cyclictest2976347-21ssh12:29:080
2876325996212,7cyclictest131rcu_preempt09:30:002
2876321996118,14cyclictest2889043-21ssh09:23:331
2876327996046,10cyclictest3467602-21systemd-journal11:40:003
2876325996038,17cyclictest275-21dbus-daemon12:05:012
2876321996024,14cyclictest364-21snmpd12:03:311
2876316995928,28cyclictest0-21swapper/007:20:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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