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2026-04-28 - 19:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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.

Total number of samples: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack9slot8s.osadl.org (updated Tue Apr 28, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501240,0irq/46-4a1000000-21swapper07:10:000
6199911543,0cyclictest81950irq/46-4a10000010:20:030
6199911530,0cyclictest9698-21ssh10:00:040
6199911347,0cyclictest81950irq/46-4a10000010:23:570
6199911132,0cyclictest2281-21rm10:56:470
6199911029,0cyclictest12086-21snmpd12:17:000
6199910941,0cyclictest81950irq/46-4a10000011:50:040
6199910934,0cyclictest27906-21runrttasks09:28:020
6199910841,0cyclictest81950irq/46-4a10000007:15:080
6199910837,0cyclictest81950irq/46-4a10000007:15:060
6199910823,0cyclictest17973-21apt-get09:00:390
6199910746,0cyclictest81950irq/46-4a10000011:04:240
6199910740,0cyclictest81950irq/46-4a10000008:40:100
6199910731,0cyclictest15101-21ssh12:39:520
6199910728,0cyclictest12606-21latency_hist08:25:030
6199910725,0cyclictest15607-21ssh10:13:350
6199910642,0cyclictest81950irq/46-4a10000012:35:040
6199910636,0cyclictest81950irq/46-4a10000008:20:030
6199910632,0cyclictest21450-21sh11:40:190
6199910631,0cyclictest14744-21latency_hist11:25:020
6199910629,0cyclictest8172-21cat11:10:080
6199910526,0cyclictest32620-21ssh09:38:470
6199910526,0cyclictest17705-21diskmemload11:31:490
6199910521,0cyclictest18927-21apt-get09:05:260
619991049,0cyclictest4310-21ssh09:48:020
6199910437,0cyclictest81950irq/46-4a10000008:40:050
6199910431,0cyclictest2051-21sh09:42:540
6199910431,0cyclictest11625-21in:imuxsock11:19:290
6199910428,0cyclictest19858-21diskmemload11:25:050
6199910427,0cyclictest23188-21ssh10:30:330
6199910333,0cyclictest6864-21sh09:53:520
6199910331,0cyclictest6853-21sshd07:47:290
6199910330,0cyclictest28361-21sh10:42:220
6199910329,0cyclictest26258-21sh09:24:220
6199910324,0cyclictest22823-21ssh09:16:320
6199910323,0cyclictest30247-21ssh12:00:240
6199910320,0cyclictest21892-21ssh09:14:350
6199910319,0cyclictest30952-21seq10:48:190
6199910311,0cyclictest20856-21ssh10:25:150
619991029,0cyclictest8480-21apt-get12:25:370
619991029,0cyclictest29640-21ssh09:31:550
6199910231,0cyclictest81950irq/46-4a10000011:10:130
6199910211,0cyclictest7483-21kworker/u2:609:55:040
6199910211,0cyclictest28182-21ssh11:55:430
6199910129,0cyclictest32147-21cron12:05:040
6199910129,0cyclictest25683-21ssh11:50:070
6199910123,0cyclictest19295-21ssh11:35:240
6199910119,0cyclictest2604-21ssh12:11:250
6199910115,0cyclictest11657-21sshd07:39:290
6199910114,0cyclictest5691-21latency_hist07:40:040
6199910110,0cyclictest25421-21ssh10:35:380
619991009,0cyclictest14019-21idleruntime-cro10:10:010
6199910027,0cyclictest8021-21latency_hist07:55:030
6199910013,0cyclictest17978-21munin-run09:00:020
619999927,0cyclictest31157-21kworker/u2:007:23:400
619999927,0cyclictest2534-21kworker/u2:112:23:350
619999925,0cyclictest32219-21sh10:51:060
619999713,0cyclictest9422-21munin-run08:05:020
619999626,0cyclictest3029-21kworker/u2:507:29:470
619999623,0cyclictest7431-21kworker/u2:007:51:410
619999623,0cyclictest16798-21kworker/u2:408:51:520
619999622,0cyclictest12710-21latency_hist08:25:030
619999618,0cyclictest10156-21apt08:10:000
619999527,0cyclictest9710-21kworker/u2:208:11:540
619999525,0cyclictest12208-21kworker/u2:608:35:010
619999511,0cyclictest1210-21systemd-journal08:49:200
61999947,0cyclictest4947-21sh07:35:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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