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2026-08-18 - 02:52

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 Tue Aug 18, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31403212272231,33sleep60-21swapper/618:51:076
31404392268259,6sleep50-21swapper/518:52:405
31405292267226,17sleep30-21swapper/318:53:533
31404442267218,17sleep00-21swapper/018:52:420
31402132260218,17sleep10-21swapper/118:50:121
31404912259214,36sleep20-21swapper/218:53:192
31403222253205,16sleep70-21swapper/718:51:087
31402682246220,17sleep40-21swapper/418:50:234
31707272950,0sleep70-21swapper/719:47:277
314089999350,1cyclictest0-21swapper/619:49:466
3140888993331,2cyclictest0-21swapper/400:28:284
3140871993331,1cyclictest1390-21snmpd21:43:481
3140888993216,2cyclictest0-21swapper/423:00:414
3140888993216,2cyclictest0-21swapper/423:00:404
3140880993231,1cyclictest0-21swapper/300:32:303
3140894993129,1cyclictest1390-21snmpd22:47:155
3140871993130,1cyclictest0-21swapper/121:53:301
3140894993029,1cyclictest0-21swapper/500:28:295
314088899302,26cyclictest528-21systemd-journal19:40:434
3140888992928,1cyclictest0-21swapper/419:47:504
314088899290,24cyclictest0-21swapper/400:04:584
3140871992928,1cyclictest0-21swapper/100:04:161
3140899992827,1cyclictest0-21swapper/620:25:556
3140894992826,2cyclictest0-21swapper/519:47:505
3140888992826,1cyclictest1390-21snmpd22:05:194
314088899282,24cyclictest528-21systemd-journal20:04:284
314088899280,26cyclictest0-21swapper/423:16:274
3140871992821,6cyclictest1390-21snmpd19:20:541
3140904992720,6cyclictest1390-21snmpd21:19:467
3140899992726,1cyclictest0-21swapper/622:23:216
3140888992723,2cyclictest1384-21arpwatch23:08:504
3140888992723,2cyclictest1384-21arpwatch23:08:504
3140888992723,2cyclictest0-21swapper/420:18:484
3140888992721,4cyclictest0-21swapper/419:42:114
314088899271,22cyclictest3084851-21kworker/4:3-events19:52:384
314088899270,25cyclictest3295270-21chrt23:43:074
314088899270,23cyclictest3084851-21kworker/4:3+mm_percpu_wq23:37:244
3140880992726,1cyclictest0-21swapper/322:54:023
3140876992725,1cyclictest3300134-21ntp_states23:53:072
3140904992622,3cyclictest1390-21snmpd22:43:007
3140904992621,4cyclictest1390-21snmpd22:34:487
3140899992620,4cyclictest0-21swapper/620:03:046
314089999260,22cyclictest0-21swapper/621:30:176
314089499260,22cyclictest0-21swapper/519:43:555
314088899266,3cyclictest0-21swapper/400:30:014
3140888992620,4cyclictest0-21swapper/423:30:514
3140888992619,5cyclictest528-21systemd-journal20:08:564
314088899260,24cyclictest571rcuc/419:00:054
314088899260,24cyclictest3084851-21kworker/4:3+mm_percpu_wq19:26:384
314088899260,24cyclictest0-21swapper/423:53:024
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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