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2026-05-09 - 21:38
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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
Characteristics of the 50 highest latencies:
System rackdslot0.osadl.org (updated Sat May 09, 2026 12:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
972999230,18cyclictest0-21swapper/108:40:011
973399212,16cyclictest0-21swapper/211:20:012
9733992117,3cyclictest0-21swapper/210:02:162
973399202,17cyclictest0-21swapper/212:20:142
9724992018,1cyclictest0-21swapper/011:15:130
9724992017,2cyclictest14499-21snapd08:25:350
9733991916,2cyclictest20146-21needreboot09:20:182
973399190,2cyclictest4035-21H222:10:212
973399190,2cyclictest3983-21H222:10:212
973399190,17cyclictest3981-21H222:10:212
973399190,16cyclictest3991-21H222:10:212
973399190,16cyclictest3989-21H222:10:212
973399190,16cyclictest3983-21H222:10:212
972999197,11cyclictest0-21swapper/107:36:591
972999194,11cyclictest0-21swapper/109:17:101
9729991915,3cyclictest0-21swapper/112:29:341
9729991915,3cyclictest0-21swapper/110:12:071
9729991914,2cyclictest3983-21H222:10:211
972999190,17cyclictest3584-21nfsd408:50:171
972999190,16cyclictest3991-21H222:10:211
972499190,4cyclictest426-21systemd-udevd07:34:530
972499190,1cyclictest16319-21smtpd08:16:070
972499190,18cyclictest0-21swapper/009:42:020
972499190,18cyclictest0-21swapper/008:52:370
972499190,16cyclictest3981-21H222:10:210
972499190,16cyclictest3981-21H222:10:210
972499190,16cyclictest3981-21H222:10:210
973399183,11cyclictest5092-21perf10:50:002
9733991816,1cyclictest0-21swapper/209:00:182
9733991815,2cyclictest4035-21H222:10:212
9733991815,2cyclictest4035-21H222:10:212
9733991815,2cyclictest3987-21H222:10:212
9733991815,2cyclictest17452-21nfsd409:15:192
9733991814,3cyclictest3991-21H222:10:212
9733991814,3cyclictest3983-21H222:10:212
9733991814,3cyclictest0-21swapper/207:24:142
973399181,16cyclictest26828-21if_err_enp1s008:35:182
973399181,16cyclictest1321-21chrt08:46:342
973399180,2cyclictest3979-21H222:10:212
973399180,2cyclictest3976-21H222:10:212
973399180,17cyclictest4099-21H222:10:212
973399180,17cyclictest3976-21H222:10:212
973399180,17cyclictest13405-21munin-plugin-st09:10:022
973399180,16cyclictest3983-21H222:10:212
973399180,16cyclictest19859-21python308:25:002
9729991816,1cyclictest0-21swapper/111:32:541
9729991816,1cyclictest0-21swapper/108:55:171
9729991816,1cyclictest0-21swapper/108:55:161
9729991815,2cyclictest4099-21H222:10:211
9729991814,3cyclictest3985-21H222:10:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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