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2026-08-06 - 08:50

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
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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.

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 Thu Aug 06, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40321212690,2sleep0201rcuc/000:03:070
39597822520,1chrt3959786-21kthreadcore22:52:570
373618299524,33cyclictest4047330-21latency_hist00:20:000
3736186995147,3cyclictest3686723-21kworker/u8:1+flush-8:019:33:051
3736182995126,17cyclictest3993100-21/usr/sbin/munin23:28:050
3736186994945,3cyclictest4012682-21kworker/u8:2+events_unbound00:08:061
3736182994839,6cyclictest4057262-21latency_hist00:30:010
373618299481,33cyclictest573-21runrttasks00:12:530
3736182994723,21cyclictest3763696-21/usr/sbin/munin19:38:040
3736186994641,4cyclictest3741122-21kworker/u8:3+events_unbound19:28:041
3736186994540,4cyclictest3878192-21kworker/u8:1+flush-8:021:58:061
3736186994539,4cyclictest3731395-21kworker/u8:2+events_unbound19:22:521
3736186994338,4cyclictest4012682-21kworker/u8:2+flush-8:000:22:521
3736186994337,5cyclictest3878192-21kworker/u8:1+events_unbound21:45:021
3736186994337,5cyclictest3793157-21kworker/u8:2+events_unbound20:27:511
373618299431,24cyclictest4007962-21/usr/sbin/munin23:42:480
3736186994237,4cyclictest3818151-21kworker/u8:3+events_unbound20:47:521
3736186994236,4cyclictest3928538-21kworker/u8:2+flush-8:022:37:521
3736182994233,6cyclictest3852284-21ntpq21:03:010
373618299421,30cyclictest573-21runrttasks00:23:040
373618299421,29cyclictest573-21runrttasks21:12:500
373618299421,29cyclictest573-21runrttasks00:37:490
38993202410,1chrt3899322-21irqrtprio21:52:550
3736186994137,3cyclictest4037241-21kworker/u8:1+events_unbound00:32:531
3736182994131,7cyclictest275-21systemd-journal23:34:590
3736182994126,13cyclictest3802840-21http20:15:000
373618299411,23cyclictest3857293-21sshd21:08:000
373618299410,39cyclictest3887812-21munin-run21:40:010
3736187994034,4cyclictest3908078-21gpgv22:00:002
3736186994034,4cyclictest3878192-21kworker/u8:1+events_unbound23:12:541
3736182994033,5cyclictest3967900-21latency_hist23:00:010
3736182994032,6cyclictest3736536-21/usr/sbin/munin19:13:040
373618299402,26cyclictest3838647-21apt-get20:52:480
3736182994022,16cyclictest3992734-21latency_hist23:25:000
3736182994022,16cyclictest3923102-21idleruntime-cro22:15:000
3736182994021,17cyclictest3797145-21ntpq20:08:000
3736187993933,4cyclictest3757860-21apt-get19:28:062
3736186993934,4cyclictest3847936-21kworker/u8:0+events_unbound21:07:501
3736186993933,4cyclictest4002804-21kworker/u8:3+events_unbound23:37:551
3736186993931,6cyclictest3958008-21latency_hist22:50:011
3736186993834,3cyclictest3952890-21kworker/u8:0+events_unbound23:08:051
3736186993834,3cyclictest3686723-21kworker/u8:1+events_unbound19:37:111
3736186993833,4cyclictest3952890-21kworker/u8:0+events_unbound23:52:511
3736186993833,4cyclictest3922949-21kworker/u8:3+events_unbound22:23:021
3736186993833,4cyclictest3758090-21kworker/u8:0+events_unbound20:12:531
373618299383,30cyclictest0-21swapper/022:42:490
373618299383,27cyclictest0-21swapper/022:32:460
373618299383,25cyclictest0-21swapper/023:14:080
3736182993819,15cyclictest0-21swapper/022:00:010
3736186993733,3cyclictest3952890-21kworker/u8:0+events_unbound00:02:501
3736186993733,3cyclictest3793157-21kworker/u8:2+flush-8:020:38:021
3736186993732,4cyclictest3793157-21kworker/u8:2+events_unbound20:07:511
373618299379,20cyclictest421rcuog/219:21:120
373618299373,28cyclictest0-21swapper/020:27:480
373618299373,26cyclictest0-21swapper/021:27:510
373618299373,19cyclictest0-21swapper/020:47:020
373618299373,18cyclictest0-21swapper/019:33:450
373618299373,17cyclictest0-21swapper/023:52:230
3736182993728,7cyclictest3968357-21/usr/sbin/munin23:03:000
3736182993722,12cyclictest4027358-21systemd-run00:00:010
373618299372,20cyclictest0-21swapper/019:41:460
373618299372,18cyclictest3783506-21apt-get19:57:510
373618299372,18cyclictest3783506-21apt-get19:57:510
3736182993721,14cyclictest0-21swapper/019:20:010
3736187993629,5cyclictest3922949-21kworker/u8:3+events_unbound22:52:582
3736186993632,3cyclictest3793157-21kworker/u8:2+flush-8:020:33:081
373618299364,18cyclictest0-21swapper/020:56:450
373618299363,19cyclictest0-21swapper/022:27:090
373618299363,19cyclictest0-21swapper/022:27:090
373618299363,19cyclictest0-21swapper/020:00:360
373618299363,19cyclictest0-21swapper/019:46:230
373618299362,21cyclictest0-21swapper/021:24:330
373618299362,20cyclictest0-21swapper/019:25:530
373618299362,1cyclictest0-21swapper/022:37:490
373618299362,19cyclictest0-21swapper/022:16:130
373618299362,19cyclictest0-21swapper/000:06:190
373618299362,18cyclictest0-21swapper/019:53:460
3736187993530,4cyclictest3758090-21kworker/u8:0+flush-8:020:12:562
3736186993531,3cyclictest4037241-21kworker/u8:1+flush-8:000:12:561
3736186993531,3cyclictest3952890-21kworker/u8:0+flush-8:022:58:051
3736186993531,3cyclictest3922949-21kworker/u8:3+flush-8:022:42:521
3736186993531,3cyclictest3857947-21kworker/u8:3+flush-8:021:28:111
3736186993531,3cyclictest3758090-21kworker/u8:0+flush-8:019:52:581
3736186993530,4cyclictest3952890-21kworker/u8:0+events_unbound23:23:061
3736186993530,4cyclictest3793157-21kworker/u8:2+events_unbound20:52:491
3736186993526,7cyclictest4027316-21latency_hist00:00:011
373618299356,16cyclictest0-21swapper/020:36:030
373618299356,16cyclictest0-21swapper/000:30:060
373618299353,28cyclictest0-21swapper/022:07:480
373618299353,17cyclictest0-21swapper/023:46:210
373618299352,20cyclictest0-21swapper/021:48:130
373618299352,19cyclictest0-21swapper/023:05:280
373618299352,19cyclictest0-21swapper/022:45:180
373618299352,19cyclictest0-21swapper/021:42:390
373618299352,19cyclictest0-21swapper/021:17:320
373618299352,19cyclictest0-21swapper/021:17:310
373618299352,19cyclictest0-21swapper/020:44:210
373618299352,19cyclictest0-21swapper/020:32:380
373618299352,19cyclictest0-21swapper/020:21:020
3736187993428,4cyclictest275-21systemd-journal22:30:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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