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2026-09-12 - 14:19

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 Sat Sep 12, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31258122560,5sleep20-21swapper/207:44:142
32819992550,2chrt75-21kworker/3:1+events10:24:083
32715952530,6sleep30-21swapper/310:14:093
3090432995142,6cyclictest3122032-21latency_hist07:40:011
3090428994739,6cyclictest3414671-21latency_hist12:35:010
3090432994635,7cyclictest3122973-21kworker/u8:3+events_unbound08:30:001
3090432994538,5cyclictest3116951-21kworker/u8:2+flush-8:007:44:221
3090428994536,7cyclictest278-21systemd-journal09:10:000
33681082440,2chrt75-21kworker/3:1-events11:49:143
31725182430,2sleep13172522-21fschecks_count08:34:081
3090432994234,3cyclictest278-21systemd-journal10:20:001
3090432994228,10cyclictest3141781-21awk08:00:001
3090432994033,5cyclictest3261366-21apt-get10:04:041
3090428994031,6cyclictest3166766-21latency_hist08:25:010
3090428994031,6cyclictest3166766-21latency_hist08:25:000
3090434993934,4cyclictest3122973-21kworker/u8:3+flush-8:008:44:232
3090428993935,3cyclictest3260823-21kworker/u8:2+flush-8:010:16:100
3090432993831,5cyclictest3192023-21grep08:54:051
3090428993829,7cyclictest3330413-21latency_hist11:10:010
3090432993730,5cyclictest3320495-21latency_hist11:00:011
3090432993729,6cyclictest3300708-21latency_hist10:40:001
3090432993724,9cyclictest278-21systemd-journal09:44:151
3090428993729,6cyclictest3335369-21apt-get11:15:010
3090428993728,7cyclictest3157630-21diskstats08:19:080
309042899372,30cyclictest3300754-21kworker/0:2+events11:41:250
309042899372,30cyclictest3300754-21kworker/0:2+events11:41:250
3090432993629,5cyclictest3185736-21journal-offline08:44:151
3090432993628,6cyclictest3107655-21/usr/sbin/munin07:29:211
3090428993627,7cyclictest3360298-21latency_hist11:40:000
309042899362,30cyclictest3090283-21kworker/0:2+events08:11:410
309042899362,29cyclictest3090283-21kworker/0:2+events09:16:530
3090432993528,5cyclictest3116951-21kworker/u8:2+events_unbound08:04:201
309042899353,30cyclictest3090283-21kworker/0:2+events09:54:130
3090434993430,3cyclictest3071039-21kworker/u8:1+events_unbound07:34:202
3090432993420,10cyclictest278-21systemd-journal09:09:151
309042899343,29cyclictest3300754-21kworker/0:2+events10:52:090
3090428993429,4cyclictest3335835-21kworker/u8:3+flush-8:012:09:090
3090428993429,4cyclictest2851114-21kworker/u8:3+flush-8:007:19:250
3090428993429,4cyclictest2851114-21kworker/u8:3+flush-8:007:19:250
3090428993426,6cyclictest3117009-21latency_hist07:35:010
309042899342,31cyclictest3090283-21kworker/0:2+events08:04:130
3090432993327,4cyclictest3305924-21kworker/u8:0+flush-8:011:34:141
309042899331,31cyclictest3090283-21kworker/0:2+events09:03:490
309042899331,26cyclictest3300754-21kworker/0:2+events11:57:570
33594122320,2sleep239-21ksoftirqd/211:39:142
3090432993227,3cyclictest3161769-21idleruntime-cro08:20:001
3090432993227,3cyclictest3091599-21irqrtprio07:14:101
3090432993226,4cyclictest3071039-21kworker/u8:1+events_unbound08:14:111
309042899322,29cyclictest3090283-21kworker/0:2+events07:44:330
3090428993222,8cyclictest278-21systemd-journal10:45:000
309042899322,25cyclictest3090283-21kworker/0:2+events09:46:210
309042899320,26cyclictest3090283-21kworker/0:2+events09:36:290
3090432993126,3cyclictest3113337-21irqrtprio07:34:091
3090432993124,5cyclictest3235329-21ntp_kernel_err09:34:141
3090432993124,5cyclictest3221743-21apt-get09:24:031
3090432993124,4cyclictest3191420-21cron08:50:001
3090432993121,7cyclictest3191376-21kworker/u8:2+flush-8:008:59:151
3090432993118,10cyclictest278-21systemd-journal11:24:141
309042899319,18cyclictest3275695-21kworker/0:1+events10:33:250
309042899319,18cyclictest3275695-21kworker/0:1+events10:33:250
309042899319,17cyclictest3275695-21kworker/0:1+events10:35:370
309042899317,19cyclictest3090283-21kworker/0:2+events09:20:130
3090428993127,3cyclictest3305924-21kworker/u8:0+events_unbound11:24:230
3090428993123,6cyclictest3090853-21/usr/sbin/munin07:14:150
309042899312,24cyclictest3090283-21kworker/0:2+events10:05:450
309042899312,24cyclictest3090283-21kworker/0:2+events09:40:090
309042899311,29cyclictest3300754-21kworker/0:2+events10:48:450
309042899311,25cyclictest3300754-21kworker/0:2+events11:26:090
309042899310,30cyclictest3300754-21kworker/0:2+events11:54:370
3090432993024,4cyclictest3335835-21kworker/u8:3+events_unbound12:24:141
3090432993024,3cyclictest3122973-21kworker/u8:3+flush-8:008:10:011
309042899307,22cyclictest3300754-21kworker/0:2+events12:01:490
309042899302,27cyclictest3265788-21kworker/0:0+events10:21:460
3090428993022,6cyclictest3404797-21latency_hist12:25:010
309042899301,24cyclictest3090283-21kworker/0:2+events08:33:570
3090434992925,2cyclictest3176523-21unixbench_singl08:34:242
3090432992925,2cyclictest3272205-21kthreadcore10:14:121
3090432992923,5cyclictest3122973-21kworker/u8:3+events_unbound08:39:091
3090432992923,4cyclictest3071039-21kworker/u8:1+flush-8:007:54:151
3090432992922,5cyclictest3335835-21kworker/u8:3+flush-8:012:04:051
3090432992922,5cyclictest3191376-21kworker/u8:2+flush-8:009:04:221
309042899299,19cyclictest3090283-21kworker/0:2+events09:56:210
309042899296,20cyclictest3300754-21kworker/0:2+events11:01:050
309042899296,18cyclictest3090283-21kworker/0:2+events07:57:170
3090428992925,2cyclictest3399814-21awk12:20:000
309042899292,23cyclictest3090283-21kworker/0:2+events08:47:090
3090434992824,3cyclictest390-21dbus-daemon10:20:002
3090434992824,3cyclictest3211264-21kworker/u8:0+events_unbound10:04:242
3090432992824,3cyclictest3211264-21kworker/u8:0+events_unbound10:09:071
3090432992823,3cyclictest3166782-21systemd-run08:25:001
3090432992823,3cyclictest3166782-21systemd-run08:25:001
3090432992822,5cyclictest3335835-21kworker/u8:3+events_unbound11:49:081
3090432992822,4cyclictest3325714-21kworker/u8:2+events_unbound12:34:151
3090432992821,5cyclictest3309936-21needreboot10:49:151
3090432992821,5cyclictest3305924-21kworker/u8:0+flush-8:012:14:161
3090432992815,9cyclictest278-21systemd-journal10:33:151
3090432992815,9cyclictest278-21systemd-journal10:33:151
3090432992815,10cyclictest278-21systemd-journal12:09:471
309042899289,17cyclictest3090283-21kworker/0:2+events08:37:180
309042899288,19cyclictest3090283-21kworker/0:2+events08:08:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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