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2026-05-17 - 02:46
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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 May 16, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33096899120108,9cyclictest350021-21apt-get08:10:041
3309689911296,12cyclictest1213033-21systemd-journal08:40:001
3309689910194,5cyclictest427477-21apt-get12:08:551
330963999993,4cyclictest318414-21kworker/u8:2+events_unbound07:20:010
330963999686,7cyclictest429104-21latency_hist12:15:010
330963999274,15cyclictest393522-21latency_hist10:25:010
330968998877,8cyclictest1213033-21systemd-journal12:40:011
330963998781,4cyclictest408139-21kworker/u8:0+events_unbound11:40:250
330968998376,6cyclictest362982-21kworker/u8:0+flush-179:009:00:001
330968998175,4cyclictest363261-21apt-get08:50:121
330968998171,8cyclictest1213033-21systemd-journal07:55:161
330963998171,7cyclictest361656-21/usr/sbin/munin08:45:230
330968998072,6cyclictest377308-21kworker/u8:2+flush-179:010:00:251
330963997973,5cyclictest366163-21kworker/u8:1+flush-179:009:29:550
330963997970,6cyclictest385568-21latency_hist10:00:010
330963997772,4cyclictest411334-21kworker/u8:1+flush-179:011:30:000
330963997671,4cyclictest354534-21kworker/u8:1+flush-179:008:34:550
330963997663,11cyclictest1213033-21systemd-journal08:25:010
330968997559,15cyclictest411334-21kworker/u8:1+flush-179:011:30:251
330963997465,6cyclictest430702-21latency_hist12:20:020
330968997358,12cyclictest377346-21apt-get09:35:001
330963997363,7cyclictest403559-21/usr/sbin/munin10:55:240
330963997165,4cyclictest334114-21kworker/u8:1+flush-179:007:20:140
330963997163,6cyclictest425880-21latency_hist12:05:010
330963997163,6cyclictest1213033-21systemd-journal10:10:000
330968997038,22cyclictest404918-21latency_hist11:00:001
330963997063,5cyclictest334038-21kworker/u8:0+flush-179:008:10:170
330963997059,9cyclictest379456-21apt-get09:40:120
330963997057,9cyclictest396698-21latency_hist10:35:010
330968996861,5cyclictest369360-21kworker/u8:0+flush-179:009:40:251
330963996856,9cyclictest382374-21latency_hist09:50:010
330968996661,3cyclictest366163-21kworker/u8:1+events_unbound09:25:231
330968996653,11cyclictest1213033-21systemd-journal09:47:551
330963996659,5cyclictest432555-21apt-get12:25:120
330963996656,8cyclictest421353-21apt-get11:50:130
33097399650,62cyclictest0-21swapper/308:53:593
330968996454,8cyclictest422920-21/usr/sbin/munin11:55:231
330963996457,5cyclictest335922-21apt-get07:25:120
330963996455,7cyclictest400387-21kworker/u8:2+flush-179:011:20:220
330968996354,7cyclictest429358-21apt-get12:15:121
330968996352,9cyclictest400406-21apt-get10:45:121
330968996345,15cyclictest318414-21kworker/u8:2+flush-179:007:10:251
330963996354,6cyclictest387155-21latency_hist10:05:010
33096399631,60cyclictest1-21systemd08:53:540
330963996252,8cyclictest401772-21kworker/u8:3+flush-179:011:04:590
330963996251,8cyclictest350157-21kworker/u8:3+flush-179:008:35:220
330963996157,3cyclictest382363-21kworker/u8:1+flush-179:010:19:560
330963996151,7cyclictest398600-21kworker/u8:0+flush-179:010:50:220
330963996150,9cyclictest366456-21apt-get09:00:120
330968996055,4cyclictest408139-21kworker/u8:0+flush-179:012:14:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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