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2026-05-25 - 21:54
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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 May 25, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
416489099119108,8cyclictest43650-21latency_hist10:55:011
416489099115105,7cyclictest50025-21latency_hist11:15:011
416489099114102,8cyclictest54811-21latency_hist11:30:011
416488999114106,5cyclictest4192490-21kworker/u8:0+events_unbound08:40:000
41648909911096,11cyclictest1213033-21systemd-journal11:45:001
41648909911096,11cyclictest1213033-21systemd-journal11:44:591
41648899910797,7cyclictest4169691-21kworker/u8:2+events_unbound07:25:010
41648899910594,8cyclictest69393-21latency_hist12:15:010
41648899910493,8cyclictest51671-21kworker/u8:3+events_unbound11:50:010
41648909910289,5cyclictest38054-21kworker/u8:0+events_unbound11:00:261
4164889999990,6cyclictest4176525-21kworker/u8:0+flush-179:008:10:010
4164889999987,9cyclictest61179-21latency_hist11:50:010
4164889999891,5cyclictest19551-21kworker/u8:3+flush-179:009:50:260
4164890999786,8cyclictest32247-21latency_hist10:20:021
4164890999783,5cyclictest4164860-21kworker/u8:2+events_unbound07:15:211
4164889999586,6cyclictest51590-21kworker/u8:0+flush-179:011:20:150
4164889999286,4cyclictest4168006-21kworker/u8:0+flush-179:007:35:230
4164890999088,1cyclictest0-21swapper/108:14:581
4164890998982,5cyclictest4192490-21kworker/u8:0+events_unbound09:15:211
4164890998980,3cyclictest14742-21kworker/u8:0+events_unbound09:35:231
4164889998980,7cyclictest70994-21latency_hist12:20:000
4164890998884,3cyclictest14742-21kworker/u8:0+events_unbound10:10:241
4164890998681,4cyclictest13107-21kworker/u8:1+events_unbound09:30:221
4164889998478,4cyclictest51590-21kworker/u8:0+flush-179:011:40:250
4164889998478,4cyclictest51590-21kworker/u8:0+flush-179:011:40:240
4164889998476,5cyclictest4174739-21kworker/u8:1+flush-179:007:40:230
4164889998471,10cyclictest56940-21diskstats11:35:140
4164889998375,5cyclictest43683-21kworker/u8:1+flush-179:011:10:130
4164889998375,5cyclictest4192490-21kworker/u8:0+flush-179:008:55:200
4164889998276,4cyclictest4164860-21kworker/u8:2+events_unbound07:10:010
4164889998271,9cyclictest14742-21kworker/u8:0+flush-179:009:45:000
4164890998177,3cyclictest4178402-21kworker/u8:2+events_unbound07:50:251
4164890998075,4cyclictest29103-21kworker/u8:3+events_unbound10:30:251
4164890998071,6cyclictest4181063-21latency_hist08:00:011
4164890998069,4cyclictest27506-21kworker/u8:2+events_unbound10:20:201
4164890997974,4cyclictest4187651-21kworker/u8:1+events_unbound08:20:161
4164890997967,10cyclictest1213033-21systemd-journal09:10:001
4164889997972,4cyclictest14742-21kworker/u8:0+flush-179:010:10:200
4164889997768,6cyclictest43683-21kworker/u8:1+events_unbound11:05:200
4164889997756,12cyclictest9983-21kworker/u8:3+flush-179:009:20:250
4164890997672,3cyclictest4178402-21kworker/u8:2+flush-179:008:00:251
4164890997670,4cyclictest74160-21kworker/u8:3+events_unbound12:30:151
4164889997670,4cyclictest59627-21kworker/u8:1+flush-179:012:05:200
4164889997569,4cyclictest4187651-21kworker/u8:1+events_unbound09:05:140
4164889997567,5cyclictest43683-21kworker/u8:1+events_unbound11:15:230
4164889997566,6cyclictest14742-21kworker/u8:0+flush-179:009:35:220
4164889997561,4cyclictest4178402-21kworker/u8:2+events_unbound07:55:020
4164890997470,3cyclictest14742-21kworker/u8:0+flush-179:010:00:261
4164890997470,3cyclictest14742-21kworker/u8:0+flush-179:010:00:261
4164890997465,6cyclictest11535-21latency_hist09:15:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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