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2026-04-23 - 00:08
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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 rackeslot6.osadl.org (updated Wed Apr 22, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9322549910597,6cyclictest949742-21kworker/u8:2+events_unbound09:30:010
9322549910497,5cyclictest993320-21kworker/u8:2+flush-179:010:35:000
9322589910094,4cyclictest991657-21kworker/u8:3+events_unbound10:55:001
932258999588,5cyclictest926161-21kworker/u8:3+flush-179:007:15:011
932254999385,6cyclictest1017923-21latency_hist11:35:000
932258999185,4cyclictest982986-21kworker/u8:0+events_unbound10:20:241
932258999185,4cyclictest982986-21kworker/u8:0+events_unbound10:20:241
932254998676,7cyclictest994873-21apt-get10:25:000
932254998676,7cyclictest994873-21apt-get10:25:000
932254998577,6cyclictest932170-21latency_hist07:10:020
932258998377,4cyclictest949742-21kworker/u8:2+flush-179:008:54:591
932258998045,33cyclictest714-21Xorg07:28:591
932258998045,33cyclictest714-21Xorg07:28:591
932258997973,4cyclictest999848-21kworker/u8:1+flush-179:011:15:011
932258997871,5cyclictest1019496-21kworker/u8:0+events_unbound11:55:011
932254997867,8cyclictest1013396-21/usr/sbin/munin11:20:230
932258997771,3cyclictest999848-21kworker/u8:1+flush-179:011:15:201
932254997772,3cyclictest982986-21kworker/u8:0+flush-179:009:55:210
932258997668,6cyclictest957721-21latency_hist08:30:001
932254997668,6cyclictest934468-21kworker/u8:0+events_unbound07:45:240
932254997667,6cyclictest993283-21latency_hist10:20:010
932254997464,8cyclictest1014984-21/usr/sbin/munin11:25:220
932258997366,5cyclictest991657-21kworker/u8:3+flush-179:010:40:001
932254997363,7cyclictest1025905-21latency_hist12:00:010
932258997257,13cyclictest1032297-21kworker/u8:2+flush-179:012:35:001
932258997065,4cyclictest1019563-21kworker/u8:2+flush-179:011:59:561
932254996961,6cyclictest1019496-21kworker/u8:0+flush-179:011:50:000
932258996863,4cyclictest999848-21kworker/u8:1+flush-179:011:00:211
932258996863,4cyclictest993320-21kworker/u8:2+flush-179:010:34:561
932258996863,4cyclictest1019496-21kworker/u8:0+flush-179:011:49:551
932258996860,6cyclictest993320-21kworker/u8:2+flush-179:010:25:221
932254996863,4cyclictest949742-21kworker/u8:2+events_unbound08:20:250
932254996862,4cyclictest1213033-21systemd-journal08:00:000
932258996760,5cyclictest1025280-21kworker/u8:3+flush-179:012:20:001
932258996758,7cyclictest963000-21/usr/sbin/munin08:45:221
932254996762,4cyclictest939260-21kworker/u8:2+flush-179:007:32:040
932258996660,5cyclictest1032217-21kworker/u8:1+flush-179:012:20:201
932258996659,5cyclictest934468-21kworker/u8:0+flush-179:008:00:211
932258996658,5cyclictest936875-21kworker/u8:1+flush-179:007:45:161
93226399650,1cyclictest0-21swapper/210:19:582
932258996457,5cyclictest1213033-21systemd-journal10:58:031
932258996455,7cyclictest1213033-21systemd-journal11:25:001
932258996453,8cyclictest1035437-21latency_hist12:30:011
932254996459,4cyclictest1032217-21kworker/u8:1+flush-179:012:24:550
932254996458,3cyclictest1-21systemd11:15:010
932254996454,8cyclictest932473-21apt-get07:10:110
932258996358,3cyclictest1025280-21kworker/u8:3+flush-179:012:05:201
932254996358,4cyclictest980779-21kworker/u8:1+events_unbound10:00:240
932258996257,4cyclictest955574-21kworker/u8:0+flush-179:008:30:041
932258996255,5cyclictest971383-21kworker/u8:0+flush-179:009:15:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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