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2026-06-23 - 22:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Tue Jun 23, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2542529682,9sleep20-21swapper/207:07:072
2531929265,9sleep30-21swapper/307:05:433
2537728468,12sleep10-21swapper/107:06:301
2351328268,9sleep00-21swapper/007:05:040
2574099262,14cyclictest2277-21ssh11:53:370
2574099260,26cyclictest0-21swapper/010:11:080
2574699250,25cyclictest0-21swapper/211:43:542
2575199232,19cyclictest0-21swapper/310:14:143
25751992218,3cyclictest39-21ksoftirqd/312:31:383
2575199221,18cyclictest0-21swapper/309:14:433
25743992221,1cyclictest0-21swapper/110:18:331
2574399210,20cyclictest18745-21diskmemload11:51:011
2574399200,20cyclictest0-21swapper/112:28:051
2574399200,20cyclictest0-21swapper/111:03:161
21572200,0sleep20-21swapper/212:12:342
25751991912,3cyclictest537-21snmpd11:16:223
2574699191,17cyclictest0-21swapper/208:00:002
25751991817,1cyclictest11026-21kworker/3:112:27:423
2575199180,18cyclictest11026-21kworker/3:112:38:333
2575199180,18cyclictest11026-21kworker/3:110:40:433
2575199180,15cyclictest0-21swapper/309:59:393
2575199180,0cyclictest0-21swapper/312:22:013
2574399180,18cyclictest0-21swapper/110:47:031
2574099182,8cyclictest28188-21munin-run09:35:000
25740991817,1cyclictest0-21swapper/010:03:460
2575199170,17cyclictest22532-21kworker/3:209:46:333
25746991715,2cyclictest0-21swapper/211:12:442
2574699171,2cyclictest141rcu_preempt12:24:222
2574699170,3cyclictest0-21swapper/211:02:412
2574399170,3cyclictest0-21swapper/112:11:391
2574399170,17cyclictest0-21swapper/112:03:371
224272170,0sleep20-21swapper/210:09:482
2575199163,9cyclictest0-21swapper/308:00:003
25751991615,1cyclictest0-21swapper/310:29:443
25751991615,1cyclictest0-21swapper/310:19:553
2574699162,13cyclictest0-21swapper/211:08:492
2574699160,1cyclictest0-21swapper/211:53:372
2574399169,5cyclictest537-21snmpd10:59:051
25743991615,1cyclictest0-21swapper/109:31:521
25743991614,1cyclictest0-21swapper/107:50:201
2574399160,16cyclictest0-21swapper/110:04:541
25740991616,0cyclictest0-21swapper/011:45:510
25740991616,0cyclictest0-21swapper/011:28:160
2574099161,1cyclictest0-21swapper/010:50:130
267222150,4sleep10-21swapper/109:52:391
2575199155,7cyclictest13668-21apt12:19:593
2575199151,13cyclictest0-21swapper/311:46:513
25746991511,2cyclictest10158-21head08:50:152
2574699150,1cyclictest0-21swapper/209:50:582
25743991513,2cyclictest0-21swapper/111:44:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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