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2026-07-28 - 00:45
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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 Jul 27, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
323393799181146,25cyclictest3318964-21latency_hist11:35:011
323393499148140,5cyclictest3320825-21latency_hist11:40:010
323393499136130,4cyclictest3228030-21kworker/u8:3+flush-179:007:30:000
323393499136128,6cyclictest3266177-21kworker/u8:0+flush-179:009:05:000
323393499135126,7cyclictest3314163-21kworker/u8:0+flush-179:011:55:000
323393499129121,5cyclictest3312573-21kworker/u8:1+events_unbound11:15:010
323393499129120,7cyclictest3248460-21kworker/u8:0+flush-179:008:10:010
323393499126116,7cyclictest3237013-21latency_hist07:20:020
323393499126116,7cyclictest3237013-21latency_hist07:20:010
323393499125118,5cyclictest3245237-21kworker/u8:1+events_unbound08:00:250
323393499122115,5cyclictest3293271-21kworker/u8:3+events_unbound10:30:010
323393499122114,6cyclictest3245237-21kworker/u8:1+events_unbound09:00:010
323393799116103,10cyclictest1213033-21systemd-journal09:35:001
323393499114108,5cyclictest3312573-21kworker/u8:1+flush-179:011:25:000
32339379911299,10cyclictest1213033-21systemd-journal11:30:001
32339379911297,11cyclictest1213033-21systemd-journal07:35:011
323393499112105,5cyclictest3304627-21kworker/u8:2+flush-179:011:05:230
323393499112105,5cyclictest3220053-21kworker/u8:0+flush-179:007:10:230
323393499111104,5cyclictest3304627-21kworker/u8:2+flush-179:011:05:000
323393499111102,7cyclictest3339090-21apt-get12:35:120
32339349911098,9cyclictest3277593-21apt-get09:25:120
323393799109102,5cyclictest3326100-21apt-get11:55:151
32339349910998,9cyclictest510-21rs:main0
323393499109102,5cyclictest3283726-21kworker/u8:2+events_unbound10:15:140
323393499108101,3cyclictest3298056-21kworker/u8:1+flush-179:010:30:250
323393799107100,4cyclictest3228030-21kworker/u8:3+events_unbound07:25:011
323393499107101,4cyclictest3302981-21kworker/u8:0+flush-179:010:45:160
323393499107100,5cyclictest3293271-21kworker/u8:3+flush-179:010:40:260
323393499107100,5cyclictest3293271-21kworker/u8:3+events_unbound10:25:010
32339349910699,5cyclictest3275785-21kworker/u8:0+events_unbound09:35:150
32339349910698,6cyclictest3283726-21kworker/u8:2+flush-179:010:05:210
32339349910497,5cyclictest3283726-21kworker/u8:2+events_unbound10:10:160
32339379910389,11cyclictest1213033-21systemd-journal09:40:001
32339349910395,6cyclictest3239909-21kworker/u8:2+flush-179:007:45:280
32339349910294,6cyclictest3272556-21latency_hist09:10:010
32339349910195,4cyclictest3324293-21kworker/u8:2+flush-179:012:15:230
32339379910094,4cyclictest3266177-21kworker/u8:0+flush-179:009:00:261
32339349910094,5cyclictest3275785-21kworker/u8:0+flush-179:009:20:010
32339349910092,6cyclictest3256352-21kworker/u8:3+flush-179:008:25:210
3233937999988,9cyclictest3337505-21apt-get12:30:111
3233937999985,11cyclictest1213033-21systemd-journal07:24:591
3233937999984,11cyclictest3302981-21kworker/u8:0+flush-179:011:10:211
3233934999991,6cyclictest3283700-21kworker/u8:0+flush-179:009:45:210
3233934999991,6cyclictest3259551-21kworker/u8:0+events_unbound08:35:020
3233934999988,9cyclictest3334332-21apt-get12:20:110
3233937999890,6cyclictest1213033-21systemd-journal11:00:001
3233934999792,4cyclictest3314163-21kworker/u8:0+events_unbound11:45:010
3233937999690,4cyclictest3287129-21apt-get09:55:111
3233937999583,9cyclictest3261154-21latency_hist08:35:011
3233937999487,5cyclictest3331138-21apt-get12:10:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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