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2026-01-05 - 10:42
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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 Jan 05, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
109705725847,8sleep50-21swapper/519:05:545
109705725847,8sleep50-21swapper/519:05:545
109714525420,30sleep70-21swapper/719:07:097
109714525420,30sleep70-21swapper/719:07:097
109754099490,47cyclictest1507508-21latency_hist22:38:267
109754099490,47cyclictest1507508-21latency_hist22:38:267
108802824737,7sleep40-21swapper/419:03:294
108802824737,7sleep40-21swapper/419:03:294
1097538994139,2cyclictest1304008-21kworker/u16:0+flush-8:021:03:266
1097538993735,2cyclictest1265767-21kworker/u16:3+flush-8:020:43:266
109713323525,7sleep60-21swapper/619:07:006
109713323525,7sleep60-21swapper/619:07:006
1097538993431,2cyclictest1323848-21kworker/u16:1+events_unbound21:28:296
1097534993331,2cyclictest1169341-21kworker/u16:2+flush-8:020:08:265
1097534993230,2cyclictest1458226-21kworker/u16:3+flush-8:022:13:265
1097540993129,1cyclictest1160594-21sed19:38:457
1097538993129,2cyclictest1498112-21kworker/u16:0+flush-8:023:13:366
1097538993028,2cyclictest1622498-21kworker/u16:0+events_unbound00:19:086
1097538993028,2cyclictest1458226-21kworker/u16:3+flush-8:022:13:526
1097538993028,2cyclictest1400807-21kworker/u16:0+flush-8:021:43:266
1097534993028,2cyclictest382376-21kworker/u16:1+flush-8:019:38:265
1097540992928,0cyclictest0-21swapper/719:18:497
1097538992826,2cyclictest1088032-21kworker/u16:3+flush-8:019:13:556
1097538992724,2cyclictest382376-21kworker/u16:1+flush-8:019:38:366
109754099260,24cyclictest1352841-21awk21:18:267
1097538992623,2cyclictest1169341-21kworker/u16:2+events_unbound19:48:286
1097534992624,2cyclictest1691217-21kworker/u16:3+flush-8:000:28:215
1097540992518,6cyclictest1159338-21latency_hist19:38:267
1097538992523,2cyclictest382376-21kworker/u16:1+events_unbound19:35:366
1097538992523,2cyclictest1623791-21kworker/u16:1+events_unbound23:50:366
1097538992522,2cyclictest1265767-21kworker/u16:3+events_unbound21:13:286
1097534992523,2cyclictest1382172-21kworker/u16:4+flush-8:021:48:265
1097540992423,0cyclictest0-21swapper/700:23:437
1097540992418,5cyclictest1497844-21latency_hist22:33:267
1097538992422,2cyclictest1159377-21kworker/u16:0+events_unbound20:03:486
1097538992421,2cyclictest1378677-21kworker/u16:3+flush-8:021:53:366
1097538992421,2cyclictest1120664-21kworker/u16:2+flush-8:019:28:366
1097534992422,2cyclictest1378677-21kworker/u16:3+events_unbound21:38:495
1097534992422,2cyclictest1265767-21kworker/u16:3+events_unbound20:48:455
1097534992420,3cyclictest1285038-21kworker/u16:2+flush-8:021:13:475
1097534992321,2cyclictest1507715-21kworker/u16:2+flush-8:022:58:265
1097534992321,2cyclictest1378677-21kworker/u16:3+flush-8:021:53:265
1097534992321,2cyclictest1378677-21kworker/u16:3+flush-8:021:53:265
1097534992321,2cyclictest1256140-21kworker/u16:1+flush-8:020:43:565
1097540992221,0cyclictest0-21swapper/720:13:517
1097540992221,0cyclictest0-21swapper/720:13:517
1097538992220,2cyclictest1720207-21kworker/u16:2+flush-8:000:28:416
1097538992220,2cyclictest1575343-21kworker/u16:4+events_unbound23:30:076
1097540992120,0cyclictest0-21swapper/723:13:467
1097540992120,0cyclictest0-21swapper/719:28:417
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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