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2026-07-31 - 09:36

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #3

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 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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 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 50 highest latencies:
System rack1slot3s.osadl.org (updated Fri Jul 31, 2026 00:43:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
57799214143,32mali-event-hand0-21swapper/119:06:011
298242995425,17cyclictest393445-21latency_hist22:40:150
298242995042,5cyclictest358213-21idleruntime-cro21:40:140
298242995019,13cyclictest404882-21grep23:00:140
29824299501,43cyclictest439810-21cron00:00:140
29824299501,43cyclictest439810-21cron00:00:140
298246994529,12cyclictest329680-21cron20:40:144
298242994518,10cyclictest396373-21cat22:45:160
298242994510,9cyclictest402160-21date22:55:150
298242994510,9cyclictest402160-21date22:55:150
298242994437,5cyclictest171ktimers/020:15:140
29824299442,5cyclictest346075-21munin-run21:20:140
298242994422,11cyclictest433724-21ssh23:49:150
29824299441,39cyclictest360040-21ssh21:41:160
29824299431,17cyclictest445121-21ssh00:08:140
57799421,3mali-event-hand0-21swapper/022:17:010
298247994228,11cyclictest551-21in:imklog00:40:145
298245994233,7cyclictest390278-21sh22:35:143
29824499428,11cyclictest22950irq/258-4b400000.display-controller23:15:142
29824299426,9cyclictest77-21kcompactd021:45:160
29824299425,19cyclictest369858-21unix_chkpwd22:00:140
298242994224,6cyclictest436908-21munin-run23:55:140
298245994131,8cyclictest335-21systemd-udevd22:53:543
298245994131,8cyclictest335-21systemd-udevd22:53:543
29824499419,11cyclictest333677-21cut20:50:352
29824499415,17cyclictest361123-21apt-get21:45:162
298242994121,4cyclictest342993-21latency_hist21:15:150
29824299411,25cyclictest0-21swapper/023:25:140
29824299411,12cyclictest431107-21basename23:45:140
29824299411,10cyclictest305276-21date19:30:150
298247994022,14cyclictest333015-21users20:45:525
298245994031,7cyclictest448-21systemd-logind23:03:543
298244994018,17cyclictest431079-21cron23:45:142
298242994023,13cyclictest397228-21ntpq22:45:440
29824299401,30cyclictest0-21swapper/021:34:160
29824299401,29cyclictest0-21swapper/019:15:150
29824299401,24cyclictest340188-21diskmemload00:23:140
29824299401,12cyclictest377833-21ssh22:12:170
29824299401,12cyclictest352443-21latency_hist21:30:150
29824299401,11cyclictest427342-21ssh23:37:180
298242994010,17cyclictest0-21swapper/020:30:150
298245993930,7cyclictest335-21systemd-udevd20:57:543
298245993930,7cyclictest335-21systemd-udevd20:57:543
298245993930,5cyclictest384473-21unix_chkpwd22:25:143
298245993921,15cyclictest611-21weston-desktop-23:33:133
298245993921,15cyclictest611-21weston-desktop-23:33:133
298244993931,5cyclictest0-21swapper/221:45:142
298243993926,10cyclictest402650-21grep22:55:381
298242993920,4cyclictest424950-21ssh23:34:130
298242993920,4cyclictest424950-21ssh23:34:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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