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2025-12-09 - 07:51
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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 Tue Dec 09, 2025 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
77854826755,8sleep40-21swapper/403:20:024
779070995452,2cyclictest1281715-21kworker/u16:4+events_unbound08:12:536
77846724838,7sleep50-21swapper/503:18:595
77844824735,8sleep60-21swapper/603:18:446
779075994641,4cyclictest789019-21latency_hist03:27:267
779068994543,2cyclictest793335-21kworker/u16:4+flush-8:003:29:355
779070994442,2cyclictest994855-21kworker/u16:1+flush-8:006:37:546
779070994441,2cyclictest883537-21kworker/u16:0+flush-8:004:22:256
779068994442,2cyclictest1216893-21kworker/u16:3+flush-8:007:09:505
77861924310,29sleep70-21swapper/703:21:027
779070994240,2cyclictest769079-21kworker/u16:0+events_unbound03:32:546
779068994139,2cyclictest994855-21kworker/u16:1+events_unbound05:08:555
779068994139,2cyclictest1351454-21kworker/u16:1+events_unbound08:21:365
779068994139,2cyclictest1266718-21kworker/u16:0+events_unbound07:34:545
779070994038,2cyclictest994855-21kworker/u16:1+events_unbound05:48:596
779070994037,2cyclictest1116068-21kworker/u16:0+flush-8:006:42:556
779068994038,2cyclictest1125872-21kworker/u16:3+events_unbound06:40:545
779075993937,1cyclictest1215552-21ntpq06:52:507
779070993937,2cyclictest994855-21kworker/u16:1+events_unbound06:28:006
779068993937,2cyclictest1266718-21kworker/u16:0+events_unbound07:20:545
779070993836,2cyclictest803445-21kworker/u16:1+flush-8:003:49:446
779068993836,2cyclictest793335-21kworker/u16:4+flush-8:003:38:445
779060993834,3cyclictest823020-21kworker/u16:3+flush-8:004:22:434
779075993732,4cyclictest853459-21latency_hist03:57:257
77907599370,35cyclictest1408086-21latency_hist08:32:257
779068993735,2cyclictest883537-21kworker/u16:0+events_unbound04:13:365
779060993735,2cyclictest1186057-21kworker/u16:4+flush-8:006:47:544
779068993634,2cyclictest883537-21kworker/u16:0+events_unbound04:28:515
779068993634,2cyclictest1351454-21kworker/u16:1+events_unbound08:05:545
77907599350,34cyclictest924084-21latency_hist04:32:267
779068993533,2cyclictest1307371-21kworker/u16:3+events_unbound08:01:485
779068993533,2cyclictest1044839-21kworker/u16:2+events_unbound06:15:535
779068993532,2cyclictest1054974-21kworker/u16:0+events_unbound05:37:195
779070993432,2cyclictest693034-21kworker/u16:2+flush-8:003:47:216
779068993432,2cyclictest994855-21kworker/u16:1+flush-8:006:08:555
779068993432,2cyclictest893859-21kworker/u16:4+flush-8:004:57:515
779068993432,2cyclictest883537-21kworker/u16:0+events_unbound04:10:355
779068993432,2cyclictest1044839-21kworker/u16:2+events_unbound05:56:365
779060993432,2cyclictest1281715-21kworker/u16:4+flush-8:008:22:534
779060993430,3cyclictest1116068-21kworker/u16:0+flush-8:006:37:434
779068993331,2cyclictest994855-21kworker/u16:1+flush-8:006:54:355
779068993331,2cyclictest863951-21kworker/u16:1+events_unbound04:04:355
779068993331,2cyclictest1281715-21kworker/u16:4+flush-8:008:24:355
779068993331,2cyclictest1266718-21kworker/u16:0+flush-8:007:30:075
779068993330,2cyclictest1368101-21kworker/u16:0+flush-8:008:32:345
779068993230,2cyclictest994855-21kworker/u16:1+flush-8:006:00:545
779068993230,2cyclictest953380-21kworker/u16:2+flush-8:004:46:075
779068993230,2cyclictest863226-21kworker/u16:5+events_unbound03:58:005
779068993230,2cyclictest823020-21kworker/u16:3+flush-8:004:35:355
779068993230,2cyclictest1307371-21kworker/u16:3+events_unbound07:50:535
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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