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2026-06-05 - 21:34
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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 Fri Jun 05, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
744763991111,107cyclictest1-21systemd10:25:000
7447639910999,8cyclictest1213033-21systemd-journal07:35:000
74476899106101,4cyclictest820144-21kworker/u8:2+events_unbound11:15:241
7447639910599,4cyclictest804151-21kworker/u8:0+flush-179:010:50:010
7447639910196,3cyclictest797575-21http09:55:010
744768999884,11cyclictest850967-21http12:40:001
744763999783,11cyclictest1213033-21systemd-journal09:50:010
744768999490,3cyclictest804164-21kworker/u8:1+events_unbound10:19:571
744768999281,9cyclictest831521-21apt-get11:40:091
744768999186,3cyclictest804164-21kworker/u8:1+events_unbound10:20:141
744763999178,10cyclictest765677-21kworker/u8:2+flush-179:008:15:010
744763998981,6cyclictest793042-21apt-get09:40:100
744768998880,5cyclictest781634-21latency_hist09:05:001
744768998869,16cyclictest836311-21http11:55:011
744763998675,8cyclictest746342-21kworker/u8:1+events_unbound07:15:250
744763998580,3cyclictest804151-21kworker/u8:0+flush-179:010:30:010
744763998571,10cyclictest824928-21kworker/u8:1+flush-179:011:50:210
744763998478,4cyclictest773633-21kworker/u8:0+flush-179:008:55:200
744763998472,9cyclictest746342-21kworker/u8:1+flush-179:007:50:170
744763998466,12cyclictest510-21rs:main0
744768998378,3cyclictest765677-21kworker/u8:2+events_unbound08:15:141
744768998176,4cyclictest827525-21kworker/u8:2+events_unbound11:35:271
744763998172,6cyclictest843759-21kworker/u8:0+events_unbound12:25:000
744763998070,7cyclictest746342-21kworker/u8:1+flush-179:008:50:210
744768997968,8cyclictest740198-21kworker/u8:2+flush-179:007:15:001
744768997873,4cyclictest773633-21kworker/u8:0+events_unbound08:39:551
744768997868,7cyclictest841322-21latency_hist12:10:021
744763997871,4cyclictest812114-21kworker/u8:1+flush-179:011:00:210
744763997869,7cyclictest804151-21kworker/u8:0+flush-179:010:35:010
744768997661,8cyclictest810801-21apt-get10:35:121
744763997668,6cyclictest746342-21kworker/u8:1+flush-179:008:45:010
744763997668,6cyclictest746342-21kworker/u8:1+flush-179:008:45:010
744763997569,4cyclictest831300-21kworker/u8:3+flush-179:012:05:000
744763997567,6cyclictest843759-21kworker/u8:0+flush-179:012:30:000
744768997469,4cyclictest773633-21kworker/u8:0+events_unbound08:49:561
744768997367,5cyclictest788047-21kworker/u8:3+flush-179:009:45:001
744763997366,5cyclictest773633-21kworker/u8:0+flush-179:009:20:260
744768997268,3cyclictest749548-21kworker/u8:3+events_unbound07:40:151
744768997147,21cyclictest1213033-21systemd-journal12:05:001
744763997166,3cyclictest805829-21kworker/u8:3+flush-179:010:35:220
744763997164,6cyclictest831300-21kworker/u8:3+flush-179:012:10:230
744763997163,5cyclictest765677-21kworker/u8:2+flush-179:008:35:230
744768997065,4cyclictest740198-21kworker/u8:2+events_unbound07:26:301
744768997061,7cyclictest822240-21diskstats11:10:151
744768997060,7cyclictest826480-21latency_hist11:25:011
744763997064,4cyclictest804151-21kworker/u8:0+flush-179:011:25:150
744763997063,4cyclictest746342-21kworker/u8:1+flush-179:007:36:290
744763997062,5cyclictest765677-21kworker/u8:2+flush-179:008:20:160
744768996965,3cyclictest746342-21kworker/u8:1+events_unbound08:13:441
744768996964,4cyclictest746342-21kworker/u8:1+events_unbound07:54:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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