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2025-12-22 - 23:05
OSADL QA Farm

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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 rack0slot2.osadl.org (updated Mon Dec 22, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
20360525241,8sleep40-21swapper/407:09:044
20358125218,30sleep70-21swapper/707:08:437
203920995044,5cyclictest721171-21latency_hist11:34:197
20352324433,8sleep50-21swapper/507:07:535
20348524434,7sleep60-21swapper/607:07:216
203908994341,2cyclictest401696-21kworker/u16:1+flush-8:009:04:204
203920993934,4cyclictest537007-21latency_hist09:59:197
203920993933,5cyclictest314131-21latency_hist08:04:207
203920993529,5cyclictest401312-21latency_hist08:49:207
203916993432,2cyclictest614571-21kworker/u16:3+flush-8:010:49:196
203908993329,3cyclictest459123-21kworker/u16:1+events_unbound10:09:424
203908993329,3cyclictest459123-21kworker/u16:1+events_unbound10:09:424
203920993226,5cyclictest650-21systemd-journal10:09:197
203916993230,2cyclictest779691-21kworker/u16:3+flush-8:012:19:186
203916993229,2cyclictest401696-21kworker/u16:1+events_unbound08:54:376
203915993230,2cyclictest429477-21kworker/u16:5+events_unbound11:29:345
203920993126,4cyclictest352840-21latency_hist08:24:197
203915993129,2cyclictest459123-21kworker/u16:1+events_unbound09:54:495
203915993028,2cyclictest411394-21kworker/u16:0+flush-8:009:14:145
203908993027,3cyclictest711236-21kworker/u16:2+flush-8:011:54:194
203916992927,2cyclictest740625-21kworker/u16:1+flush-8:011:44:416
203915992927,2cyclictest740625-21kworker/u16:1+flush-8:011:59:345
203915992826,2cyclictest429477-21kworker/u16:5+flush-8:010:24:145
203908992826,2cyclictest779691-21kworker/u16:3+flush-8:012:19:134
203908992826,2cyclictest411394-21kworker/u16:0+flush-8:009:09:434
203920992726,0cyclictest0-21swapper/707:18:117
203920992625,0cyclictest0-21swapper/711:04:397
203916992624,2cyclictest594680-21kworker/u16:1+flush-8:011:00:216
203915992622,3cyclictest769948-21kworker/u16:0+flush-8:012:14:375
203920992524,0cyclictest0-21swapper/712:38:417
203920992524,0cyclictest0-21swapper/710:03:467
203920992524,0cyclictest0-21swapper/707:12:037
203916992523,2cyclictest459123-21kworker/u16:1+events_unbound09:19:426
203915992522,2cyclictest324233-21kworker/u16:3+events_unbound08:14:345
203920992423,0cyclictest0-21swapper/711:36:387
203920992423,0cyclictest0-21swapper/710:56:467
203920992423,0cyclictest0-21swapper/709:13:037
203920992423,0cyclictest0-21swapper/708:11:477
203920992423,0cyclictest0-21swapper/707:35:467
203916992421,2cyclictest459123-21kworker/u16:1+flush-8:009:48:226
203908992421,2cyclictest721404-21kworker/u16:0+events_unbound11:34:454
203908992421,2cyclictest246356-21kworker/u16:2+events_unbound08:34:394
203908992421,2cyclictest246356-21kworker/u16:2+events_unbound08:34:394
203920992322,0cyclictest0-21swapper/709:48:437
203920992322,0cyclictest0-21swapper/709:33:467
203916992321,2cyclictest305551-21kworker/u16:1+events_unbound08:29:466
203916992320,2cyclictest390615-21kworker/u16:4+events_unbound08:49:386
203915992320,2cyclictest411394-21kworker/u16:0+flush-8:009:14:375
203920992222,0cyclictest0-21swapper/710:26:347
203920992221,0cyclictest0-21swapper/712:31:377
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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