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2026-08-10 - 23:57
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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 Mon Aug 10, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
350087299142133,7cyclictest3592843-21latency_hist11:55:020
350087299136118,15cyclictest3600814-21latency_hist12:20:020
350087299136118,15cyclictest3600814-21latency_hist12:20:010
350087299134123,8cyclictest3549611-21latency_hist09:40:020
350087299122115,4cyclictest3551180-21kworker/u8:0+events_unbound09:55:010
350087999119112,5cyclictest3579860-21turbostat11:14:593
350087699118107,8cyclictest3508721-21latency_hist07:35:001
350087299115105,8cyclictest3586232-21apt-get11:35:010
35008769911097,9cyclictest1213033-21systemd-journal10:20:001
35008729910897,9cyclictest1213033-21systemd-journal10:10:010
35008769910788,18cyclictest3516678-21kworker/u8:0+events_unbound09:05:001
35008729910695,8cyclictest3567109-21latency_hist10:35:010
35008769910392,8cyclictest3493381-21kworker/u8:0+flush-179:007:15:001
35008769910192,7cyclictest3525192-21apt-get08:25:121
35008729910184,15cyclictest3557566-21latency_hist10:05:010
3500872999990,7cyclictest3500736-21latency_hist07:10:020
3500872999988,9cyclictest1213033-21systemd-journal07:25:010
3500872999987,9cyclictest3602951-21diskstats12:25:150
3500876999893,3cyclictest3585292-21kworker/u8:0+flush-179:011:55:251
3500876999683,12cyclictest3560781-21kworker/u8:3+flush-179:010:40:011
3500872999689,5cyclictest3571926-21kworker/u8:2+flush-179:011:15:160
3500872999688,6cyclictest3507739-21kworker/u8:1+events_unbound08:25:240
3500872999687,6cyclictest3507739-21kworker/u8:1+flush-179:007:30:210
3500876999588,4cyclictest3551180-21kworker/u8:0+flush-179:010:40:251
3500872999487,5cyclictest3605564-21kworker/u8:1+events_unbound12:35:230
3500872999483,9cyclictest3516678-21kworker/u8:0+flush-179:008:05:170
3500872999483,8cyclictest1213033-21systemd-journal09:10:270
3500872999382,8cyclictest3560781-21kworker/u8:3+flush-179:010:50:220
3500872999285,5cyclictest3551180-21kworker/u8:0+flush-179:010:35:220
3500872999284,5cyclictest3515112-21latency_hist07:55:000
3500872999283,6cyclictest3532892-21latency_hist08:50:020
3500872999084,5cyclictest3544545-21kworker/u8:2+flush-179:009:34:560
3500872999084,5cyclictest3507739-21kworker/u8:1+flush-179:008:10:260
3500872999077,10cyclictest1213033-21systemd-journal10:50:000
3500876998981,6cyclictest3573512-21kworker/u8:1+flush-179:011:30:011
3500876998780,4cyclictest3583277-21kworker/u8:2+events_unbound11:40:011
3500876998775,9cyclictest1213033-21systemd-journal11:30:151
3500872998781,4cyclictest3592879-21kworker/u8:1+flush-179:012:00:230
3500872998778,6cyclictest3528111-21latency_hist08:35:020
3500876998680,5cyclictest3516678-21kworker/u8:0+flush-179:009:15:281
3500872998675,8cyclictest3560781-21kworker/u8:3+events_unbound10:40:120
3500876998576,6cyclictest3516678-21kworker/u8:0+flush-179:009:10:161
3500876998563,19cyclictest3513525-21latency_hist07:50:011
3500872998579,5cyclictest3583277-21kworker/u8:2+events_unbound12:15:010
3500872998476,6cyclictest3573512-21kworker/u8:1+flush-179:011:00:010
3500872998471,4cyclictest3544545-21kworker/u8:2+events_unbound09:30:000
3500872998470,11cyclictest1213033-21systemd-journal09:25:000
3500876998376,3cyclictest3537652-21kworker/u8:2+flush-179:009:05:221
3500876998362,18cyclictest1213033-21systemd-journal07:59:591
3500872998376,4cyclictest3516678-21kworker/u8:0+flush-179:008:55:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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