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2025-12-14 - 02:49
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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 Sat Dec 13, 2025 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2758994999181,8cyclictest2781751-21latency_hist08:20:010
2758996998275,6cyclictest2758922-21kworker/u8:0+events_unbound07:35:011
2758996998175,5cyclictest2768719-21kworker/u8:3+events_unbound07:40:021
2758996997869,7cyclictest2808813-21latency_hist09:45:011
2758994997670,5cyclictest2802480-21kworker/u8:0+flush-179:010:00:320
2758994997560,14cyclictest0-21swapper/010:26:000
2758996997469,4cyclictest2851008-21kworker/u8:2+events_unbound12:10:241
2758996997368,3cyclictest2781712-21kworker/u8:0+flush-179:008:30:161
2758996997065,3cyclictest2789729-21kworker/u8:2+events_unbound09:05:151
2758996997055,14cyclictest2824517-21kworker/u8:3+flush-179:010:35:251
2758996996965,3cyclictest2849355-21kworker/u8:1+flush-179:011:55:001
2758996996961,3cyclictest2843000-21kworker/u8:2+events_unbound11:45:241
2758994996953,14cyclictest2783338-21latency_hist08:25:010
2758996996662,3cyclictest2821844-21kworker/u8:0+events_unbound10:55:241
275899499660,2cyclictest0-21swapper/010:56:590
2758994996459,3cyclictest2802480-21kworker/u8:0+flush-179:009:35:250
2758996996258,3cyclictest2775337-21kworker/u8:2+events_unbound08:15:251
2758996996249,4cyclictest2781712-21kworker/u8:0+events_unbound08:20:191
2758994996253,7cyclictest2835067-21latency_hist11:05:010
2758994996250,9cyclictest2848056-21apt-get11:45:120
2758996996156,4cyclictest2802480-21kworker/u8:0+flush-179:009:35:261
2758994996152,7cyclictest2804287-21apt-get09:30:120
4577091600,9ptp4l441ktimers/307:07:593
2758996996055,4cyclictest2809506-21kworker/u8:1+events_unbound10:20:251
2758996996049,10cyclictest2855800-21kworker/u8:3+flush-179:012:25:001
2758996995950,7cyclictest2777207-21/usr/sbin/munin08:05:221
2758994995952,5cyclictest2817026-21latency_hist10:10:010
2758996995753,3cyclictest2809506-21kworker/u8:1+events_unbound10:00:151
2758994995749,6cyclictest2786513-21latency_hist08:35:010
2758994995649,5cyclictest2758922-21kworker/u8:0+flush-179:007:40:000
2758996995550,4cyclictest2775337-21kworker/u8:2+events_unbound08:00:191
2758996995547,6cyclictest2780142-21latency_hist08:15:001
2758996995547,6cyclictest2780142-21latency_hist08:15:001
2758996995543,9cyclictest266-21systemd-journal09:05:001
2758996995543,9cyclictest266-21systemd-journal09:05:001
2758996995450,3cyclictest2809506-21kworker/u8:1+events_unbound10:10:151
2758996995449,4cyclictest2815703-21kworker/u8:2+events_unbound10:15:201
2758996995449,4cyclictest2770646-21kworker/u8:1+flush-179:007:59:541
2758994995342,9cyclictest266-21systemd-journal07:32:150
2758996995248,3cyclictest2802480-21kworker/u8:0+flush-179:009:59:561
2758996995247,4cyclictest2781712-21kworker/u8:0+events_unbound08:25:231
2758996995247,4cyclictest2738876-21kworker/u8:3+flush-179:007:20:261
2758996995147,3cyclictest2847210-21kworker/u8:0+flush-179:012:05:221
2758996995146,4cyclictest2796041-21kworker/u8:1+events_unbound09:20:241
2758996995145,4cyclictest2844845-21/usr/sbin/munin11:35:231
2758996995141,8cyclictest2827106-21apt-get10:40:141
2758996995140,9cyclictest2830535-21apt-get10:50:131
2758994995147,3cyclictest2847210-21kworker/u8:0+flush-179:012:00:220
2758994995144,4cyclictest2821844-21kworker/u8:0+flush-179:010:50:010
2758994995142,7cyclictest2783576-21/usr/sbin/munin08:25:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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