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2026-07-20 - 01:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Sun Jul 19, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28171172760,2sleep3471rcuc/308:47:393
2715973996238,21cyclictest2956403-21latency_hist11:10:010
2715973995834,21cyclictest3030921-21latency_hist12:25:010
2715973995526,21cyclictest2935780-21needreboot10:47:330
2715973995526,21cyclictest2935780-21needreboot10:47:330
2715977995447,4cyclictest281-21systemd-journal08:37:401
2715977995446,6cyclictest2783331-21/usr/sbin/munin08:17:401
2715973995411,29cyclictest0-21swapper/010:32:230
2715977995345,6cyclictest3006081-21latency_hist12:00:011
2715973995323,20cyclictest0-21swapper/009:17:230
2715977995145,4cyclictest2691670-21kworker/u8:4+flush-8:008:27:381
2715973995142,6cyclictest3011034-21latency_hist12:05:000
2715973995040,7cyclictest2862530-21latency_hist09:35:000
2715977994942,5cyclictest2732950-40mandb07:25:011
2715977994939,7cyclictest3015987-21kworker/u8:2+flush-8:012:22:401
2715973994939,7cyclictest2881537-21ntpq09:52:360
2715977994841,5cyclictest1882543-21kworker/u8:2+flush-8:008:02:271
2715977994839,6cyclictest2691670-21kworker/u8:4+flush-8:007:37:261
2715973994839,6cyclictest2842516-21latency_hist09:15:010
2715977994742,3cyclictest2691670-21kworker/u8:4+flush-8:008:22:251
2715973994737,7cyclictest2807648-21apt-get08:40:010
271597399469,27cyclictest2742134-21ntpq07:32:350
2715973994620,16cyclictest161rcu_preempt07:27:350
2715982994540,3cyclictest2837575-21kworker/u8:1+flush-8:009:57:392
2715973994523,16cyclictest2990499-21needreboot11:42:310
2715973994517,19cyclictest0-21swapper/010:30:000
2715982994440,3cyclictest2837575-21kworker/u8:1+flush-8:010:37:312
2715977994436,6cyclictest1882543-21kworker/u8:2+flush-8:007:27:431
2715977994337,4cyclictest2766958-21ntpq07:57:371
2715977994336,5cyclictest2941793-21kworker/u8:4+events_unbound11:10:021
2715977994336,5cyclictest2808327-21apt-get08:42:201
2715973994323,13cyclictest0-21swapper/011:52:330
2715973994317,24cyclictest2850534-21kthreadcore09:22:320
2715973994317,21cyclictest0-21swapper/007:57:230
2715973994315,21cyclictest1-21systemd11:00:010
271565324329,9sleep10-21swapper/107:08:201
2715973994236,4cyclictest2887681-21apt-get10:02:220
2715973994232,8cyclictest2732177-21ntpq07:22:350
2715973994229,10cyclictest281-21systemd-journal10:42:250
2715977994135,4cyclictest2748065-21kworker/u8:0+flush-8:010:32:261
2715973994126,13cyclictest2720921-21systemd-run07:15:000
2715973994121,17cyclictest281-21systemd-journal09:05:000
2715973994114,19cyclictest0-21swapper/012:07:360
2715973994112,21cyclictest2937290-21sh10:52:250
2715982994034,4cyclictest2748065-21kworker/u8:0+events_unbound09:37:392
2715977994034,5cyclictest2748065-21kworker/u8:0+flush-8:010:02:391
2715977994032,6cyclictest2906192-21ntpq10:17:341
2715977994031,7cyclictest281-21systemd-journal07:53:401
2715977994031,6cyclictest2847456-21latency_hist09:20:011
271597399408,22cyclictest2896437-21ntp_states10:07:370
2715973994024,14cyclictest2816952-21needreboot08:47:340
2715973994012,20cyclictest0-21swapper/008:12:330
2715982993934,4cyclictest3030705-21kworker/u8:0+events_unbound12:25:012
2715982993933,4cyclictest1882543-21kworker/u8:2+flush-8:007:22:272
2715977993935,3cyclictest2691670-21kworker/u8:4+events_unbound07:12:281
2715977993934,4cyclictest2748065-21kworker/u8:0+flush-8:010:27:261
2715973993923,14cyclictest2981376-21cron11:35:000
271597399387,18cyclictest0-21swapper/007:17:250
2715973993819,17cyclictest2772318-21unixbench_multi08:02:420
271597399381,25cyclictest585-21runrttasks09:45:400
2715977993729,5cyclictest2812580-21kworker/u8:2+flush-8:008:52:401
2715977993726,8cyclictest281-21systemd-journal07:35:001
271597399378,19cyclictest0-21swapper/008:22:340
271597399373,24cyclictest0-21swapper/012:32:240
271597399373,19cyclictest0-21swapper/012:17:230
2715973993726,9cyclictest2911188-21ntpq10:22:350
2715973993720,15cyclictest0-21swapper/009:57:390
2715973993711,17cyclictest0-21swapper/008:57:380
271597399370,26cyclictest3020428-21/usr/sbin/munin12:12:390
2715982993630,4cyclictest2941793-21kworker/u8:4+flush-8:011:35:012
2715977993631,4cyclictest2951274-21kworker/u8:1+flush-8:011:12:581
2715977993631,4cyclictest2748065-21kworker/u8:0+flush-8:010:57:571
2715977993626,7cyclictest2951449-21latency_hist11:05:011
271597399366,16cyclictest0-21swapper/011:24:030
2715973993621,13cyclictest0-21swapper/007:40:000
2715973993618,16cyclictest2957066-21cpuspeed_turbos11:12:240
271597399360,23cyclictest585-21runrttasks08:32:540
2715982993528,5cyclictest2837575-21kworker/u8:1+flush-8:010:47:262
2715982993528,5cyclictest2837575-21kworker/u8:1+flush-8:010:47:262
2715982993528,5cyclictest2837575-21kworker/u8:1+events_unbound09:52:412
2715982993527,5cyclictest2747803-21cat07:40:002
2715977993530,4cyclictest2691670-21kworker/u8:4+flush-8:008:07:261
2715977993528,5cyclictest2748254-21apt-get07:42:211
2715977993527,6cyclictest2911735-21kworker/u8:3+flush-8:011:17:251
271597399353,23cyclictest0-21swapper/012:28:380
271597399353,20cyclictest2773017-21apt-get08:07:230
271597399351,23cyclictest0-21swapper/008:51:480
271597399350,24cyclictest2787767-21sshd08:18:400
271597399350,20cyclictest2951466-21/usr/sbin/munin11:05:010
2715977993429,4cyclictest2782743-21systemd-run08:15:001
2715977993429,4cyclictest2748065-21kworker/u8:0+flush-8:010:07:261
271597399348,14cyclictest2812013-21head08:42:330
271597399343,21cyclictest0-21swapper/009:40:390
271597399343,21cyclictest0-21swapper/009:26:350
271597399343,21cyclictest0-21swapper/009:26:350
271597399341,23cyclictest3041741-21/usr/sbin/munin12:37:290
271597399341,21cyclictest0-21swapper/009:06:280
271597399341,19cyclictest2748271-21aten2_r5power_c07:42:230
271597399341,18cyclictest2975792-21ntpq11:27:380
271597399340,22cyclictest585-21runrttasks10:10:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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