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2026-07-18 - 13:24

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 rack0slot3s.osadl.org (updated Sat Jul 18, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22643462264216,38sleep10-21swapper/118:36:521
22643212262214,16sleep20-21swapper/218:36:362
22646422260213,16sleep50-21swapper/518:40:375
22644422256233,15sleep30-21swapper/318:37:553
22644102252227,16sleep60-21swapper/618:37:336
22644252248220,18sleep70-21swapper/718:37:427
22645882247220,18sleep00-21swapper/018:39:550
22645462245220,17sleep40-21swapper/418:39:154
2264973993531,2cyclictest0-21swapper/421:51:174
2264973993124,5cyclictest528-21systemd-journal20:55:374
2264973993023,5cyclictest528-21systemd-journal18:54:594
2264973993023,5cyclictest528-21systemd-journal18:54:594
2264973993022,7cyclictest528-21systemd-journal22:30:424
2264973992922,5cyclictest528-21systemd-journal19:59:564
2264973992922,5cyclictest528-21systemd-journal19:22:494
2264973992821,5cyclictest2283566-21cat19:13:414
226497399270,25cyclictest0-21swapper/400:04:434
2264964992718,5cyclictest0-21swapper/200:10:152
2264964992718,5cyclictest0-21swapper/200:10:152
226495999270,25cyclictest0-21swapper/122:13:591
226497799260,24cyclictest0-21swapper/522:02:115
226497799260,22cyclictest0-21swapper/519:48:165
2264973992620,4cyclictest888-21in:imjournal21:20:214
2264973992619,5cyclictest528-21systemd-journal20:44:484
226497399260,25cyclictest528-21systemd-journal22:45:264
226497399260,23cyclictest528-21systemd-journal20:07:414
226495999260,22cyclictest0-21swapper/100:37:351
226495599260,22cyclictest0-21swapper/021:07:410
2264986992521,3cyclictest1390-21snmpd23:54:377
2264977992518,5cyclictest0-21swapper/523:02:215
2264977992518,5cyclictest0-21swapper/519:21:425
226497799250,23cyclictest0-21swapper/522:07:445
2264973992521,3cyclictest1390-21snmpd22:27:424
2264973992518,5cyclictest2446246-21ntp_states00:34:304
2264973992518,3cyclictest0-21swapper/420:13:014
2264973992516,3cyclictest0-21swapper/420:25:254
226497399250,24cyclictest528-21systemd-journal20:34:444
226497399250,23cyclictest2168401-21kworker/4:2+mm_percpu_wq22:40:254
2264968992518,5cyclictest0-21swapper/319:13:003
2264964992522,2cyclictest1390-21snmpd20:13:072
2264964992521,3cyclictest1390-21snmpd22:42:462
226496499250,1cyclictest0-21swapper/218:48:582
226496499250,1cyclictest0-21swapper/218:48:572
2264955992521,3cyclictest1390-21snmpd21:55:490
2264955992521,3cyclictest1390-21snmpd19:45:330
2264955992518,5cyclictest0-21swapper/019:14:350
2264955992516,5cyclictest0-21swapper/019:38:350
2264986992420,3cyclictest1390-21snmpd23:10:347
2264986992420,3cyclictest1390-21snmpd21:36:577
226498699240,23cyclictest0-21swapper/719:08:127
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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