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2026-08-14 - 21:03

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 Fri Aug 14, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39618752740,7sleep0201rcuc/010:42:470
3749995996349,11cyclictest3945942-21cat10:25:012
38506512620,1sleep03850652-21collect208:47:550
40390242580,3chrt575-21kworker/3:2-events11:57:503
3749985995747,7cyclictest3811498-21latency_hist08:10:010
3749985995344,6cyclictest275-21systemd-journal08:20:000
3749988995246,4cyclictest4060626-21kworker/u8:1+flush-8:012:28:001
3749988995041,6cyclictest4031064-21base6411:50:011
3749988994943,4cyclictest3771853-21kworker/u8:0+flush-8:008:02:471
3749985994940,6cyclictest3996193-21cat11:15:010
3749988994835,10cyclictest275-21systemd-journal10:24:021
3749988994741,4cyclictest3745149-21kworker/u8:3+events_unbound07:15:031
3749988994640,4cyclictest4041278-21kworker/u8:0+flush-8:012:07:581
3749988994540,4cyclictest3851595-21kworker/u8:2+events_unbound10:02:451
3749988994538,5cyclictest3991044-21kworker/u8:1+flush-8:011:57:431
3749995994435,6cyclictest3981121-21cp11:00:012
3749985994334,6cyclictest4070819-21latency_hist12:30:010
3749988994233,7cyclictest3915289-21ntpq09:52:571
3749988994137,3cyclictest3836362-21kworker/u8:1+events_unbound09:17:441
3749985994132,7cyclictest3762458-21diskstats07:22:450
3749988994035,4cyclictest3891366-21kworker/u8:0+flush-8:010:47:441
3749988994035,3cyclictest3970782-21kworker/u8:3+events_unbound11:43:001
374998599403,17cyclictest3920198-21collect209:57:530
3749985994029,9cyclictest275-21systemd-journal07:15:010
3749988993934,4cyclictest3786779-21kworker/u8:3+events_unbound08:17:491
3749988993934,4cyclictest3771853-21kworker/u8:0+events_unbound08:22:581
3749988993934,4cyclictest3771853-21kworker/u8:0+events_unbound08:22:581
3749988993932,5cyclictest3891366-21kworker/u8:0+flush-8:009:32:531
3749988993833,4cyclictest3851595-21kworker/u8:2+flush-8:009:27:561
3749988993833,3cyclictest3901604-21apt-get09:42:421
3749988993833,3cyclictest3901604-21apt-get09:42:411
3749988993832,4cyclictest3891366-21kworker/u8:0+flush-8:009:37:501
3749988993827,8cyclictest3910431-21ntpq09:47:571
374998599385,17cyclictest0-21swapper/008:37:410
3749985993829,7cyclictest3845773-21ntpq08:42:580
3749985993829,6cyclictest4016074-21latency_hist11:35:010
3749988993732,3cyclictest3713245-21kworker/u8:1+flush-8:007:37:521
3749985993732,4cyclictest3991044-21kworker/u8:1+events_unbound11:52:490
3749985993725,10cyclictest3941257-21/usr/sbin/munin10:22:580
3749985993710,15cyclictest4056540-21/usr/sbin/munin12:17:440
3749988993632,3cyclictest4041278-21kworker/u8:0+events_unbound12:37:581
3749988993626,8cyclictest3775863-21ntpq07:32:591
3749988993625,8cyclictest275-21systemd-journal12:31:031
374998599367,12cyclictest3852280-21/usr/sbin/munin08:52:470
3749988993530,4cyclictest3970782-21kworker/u8:3+events_unbound10:52:581
3749988993530,4cyclictest3891366-21kworker/u8:0+events_unbound11:07:541
3749988993530,4cyclictest3866026-21kworker/u8:3+flush-8:010:37:491
3749988993528,5cyclictest4065012-21ntpq12:22:541
3749988993526,7cyclictest3851355-21latency_hist08:50:011
3749988993523,9cyclictest275-21systemd-journal07:55:021
374998599356,11cyclictest39031751kthreadcore09:42:500
374998599356,11cyclictest39031751kthreadcore09:42:500
374998599354,19cyclictest3985150-21ntpq11:02:560
3749985993530,3cyclictest4080818-21apt-key12:40:000
3749995993426,6cyclictest4031320-21cp11:50:012
3749988993426,6cyclictest3782235-21apt-get07:42:411
3749988993425,7cyclictest3835817-21ntpq08:32:571
3749988993424,8cyclictest3795901-21ntpq07:52:541
3749985993423,8cyclictest3980683-21apt-get11:00:000
3749988993329,3cyclictest3851595-21kworker/u8:2+events_unbound11:27:421
3749988993328,3cyclictest3891366-21kworker/u8:0+flush-8:009:57:531
3749988993328,3cyclictest3786779-21kworker/u8:3+flush-8:008:45:011
3749988993326,5cyclictest3891366-21kworker/u8:0+flush-8:010:17:461
374998599335,16cyclictest3856976-21cpuspeed_turbos08:57:430
3749985993325,6cyclictest3956642-21diskstats10:37:450
3749985993324,6cyclictest3911066-21latency_hist09:50:000
3749985993321,9cyclictest275-21systemd-journal08:00:000
39225412320,2sleep0201rcuc/010:02:510
3749988993228,3cyclictest3851595-21kworker/u8:2+flush-8:011:23:031
3749988993228,3cyclictest3851595-21kworker/u8:2+flush-8:011:23:031
3749988993226,5cyclictest4041278-21kworker/u8:0+flush-8:012:13:001
3749988993226,4cyclictest3771411-21grep07:28:021
374998599328,13cyclictest3966676-21/usr/sbin/munin10:47:460
374998599326,9cyclictest3757944-21ps07:17:480
374998599325,15cyclictest4051979-21ps12:12:500
3749995993122,6cyclictest275-21systemd-journal09:15:012
3749988993127,3cyclictest3851595-21kworker/u8:2+flush-8:009:12:591
3749988993126,4cyclictest3851595-21kworker/u8:2+flush-8:011:02:551
3749988993126,4cyclictest3836362-21kworker/u8:1+flush-8:008:57:541
3749988993126,4cyclictest3713245-21kworker/u8:1+flush-8:007:12:591
3749988993126,3cyclictest3713245-21kworker/u8:1+events_unbound07:25:011
3749988993125,5cyclictest3851595-21kworker/u8:2+flush-8:010:07:551
374998599318,11cyclictest3865258-21/usr/sbin/munin09:02:560
374998599317,13cyclictest3870455-21ntpq09:07:560
374998599316,14cyclictest3975062-21ntpq10:52:550
374998599315,15cyclictest1-21systemd10:15:010
374998599314,16cyclictest4005978-21users11:23:000
374998599314,16cyclictest4005978-21users11:23:000
374998599313,14cyclictest3887220-21ps09:27:480
3749985993111,10cyclictest3895272-21ntpq09:32:580
3749995993026,2cyclictest3960874-21cron10:40:002
3749988993026,3cyclictest3786779-21kworker/u8:3+events_unbound08:26:501
3749988993024,5cyclictest3851595-21kworker/u8:2+flush-8:011:38:001
3749988993024,4cyclictest3866026-21kworker/u8:3+flush-8:010:35:011
3749988993021,7cyclictest275-21systemd-journal12:20:001
374998599309,10cyclictest3885342-21ntpq09:22:540
374998599308,12cyclictest3876520-21/usr/sbin/munin09:17:400
374998599308,11cyclictest4050464-21python312:08:000
374998599308,10cyclictest3950234-21ntpq10:27:540
374998599307,5cyclictest3872321-21ps09:12:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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