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2026-07-08 - 23:32
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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 Wed Jul 08, 2026 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
205465599137128,6cyclictest2135869-21latency_hist11:20:011
205465199130122,6cyclictest2098713-21kworker/u8:0+events_unbound09:35:000
205465599129118,9cyclictest2158266-21dpkg12:27:381
205465199119113,5cyclictest2140675-21kworker/u8:1+flush-179:011:35:000
205465599116102,11cyclictest1213033-21systemd-journal12:24:591
205465599112104,5cyclictest2142238-21latency_hist11:40:011
205465199107100,5cyclictest2103476-21kworker/u8:1+events_unbound09:50:140
20546519910599,5cyclictest2092586-21kworker/u8:1+events_unbound09:20:010
20546559910495,6cyclictest2161620-21latency_hist12:35:011
20546519910394,6cyclictest2062606-21kworker/u8:2+events_unbound08:00:130
20546519910190,9cyclictest2054369-21latency_hist07:10:030
2054651999992,4cyclictest2143813-21kworker/u8:0+flush-179:012:25:150
2054655999891,5cyclictest2097097-21kworker/u8:3+flush-179:009:25:251
2054651999772,9cyclictest1213033-21systemd-journal09:10:010
2054651999687,7cyclictest2070862-21apt-get08:00:000
2054655999587,6cyclictest2041944-21kworker/u8:1+flush-179:007:40:001
2054651999485,7cyclictest2061026-21latency_hist07:30:020
2054655999285,5cyclictest2100346-21kworker/u8:2+flush-179:010:00:151
2054651999286,5cyclictest2103476-21kworker/u8:1+flush-179:009:50:000
2054651999284,7cyclictest2092586-21kworker/u8:1+flush-179:009:15:010
2054655999083,5cyclictest2065851-21apt-get07:45:021
2054655999083,5cyclictest2065851-21apt-get07:45:011
2054651999083,5cyclictest2089153-21latency_hist08:55:020
2054651999081,7cyclictest2075874-21kworker/u8:0+events_unbound08:15:000
2054655998980,6cyclictest2057832-21latency_hist07:20:011
2054655998975,11cyclictest1213033-21systemd-journal08:55:261
2054651998981,6cyclictest2119460-21kworker/u8:3+events_unbound10:35:010
2054655998778,6cyclictest2129541-21kworker/u8:2+flush-179:011:30:191
2054651998776,9cyclictest1213033-21systemd-journal11:15:000
2054651998680,4cyclictest2143813-21kworker/u8:0+events_unbound11:50:250
2054655998575,7cyclictest2126047-21kworker/u8:1+events_unbound10:55:141
2054655998573,10cyclictest2143881-21kworker/u8:3+flush-179:011:50:011
2054651998477,5cyclictest2113286-21kworker/u8:1+flush-179:010:20:170
2054651998477,5cyclictest2065242-21kworker/u8:3+flush-179:008:05:210
2054655998375,6cyclictest2084431-21kworker/u8:0+flush-179:008:50:011
2054655998374,6cyclictest2111447-21kworker/u8:0+flush-179:010:25:221
2054651998277,4cyclictest2054437-21kworker/u8:3+flush-179:007:10:170
2054655998174,5cyclictest2150189-21kworker/u8:3+events_unbound12:20:011
2054655998174,5cyclictest2150189-21kworker/u8:3+events_unbound12:20:011
2054651998073,5cyclictest2129541-21kworker/u8:2+flush-179:011:10:010
2054651998071,7cyclictest1213033-21systemd-journal10:10:000
2054655997972,5cyclictest2100346-21kworker/u8:2+flush-179:010:05:151
2054655997971,6cyclictest2129763-21apt-get11:00:101
2054651997976,2cyclictest2140675-21kworker/u8:1+events_unbound11:40:140
2054655997871,5cyclictest2106936-21apt-get09:50:101
2054655997868,7cyclictest2113286-21kworker/u8:1+flush-179:010:20:211
2054651997872,5cyclictest2054437-21kworker/u8:3+flush-179:007:25:010
2054651997869,7cyclictest510-21rs:main0
2054655997768,7cyclictest2078319-21kworker/u8:2+flush-179:008:55:001
2054655997763,9cyclictest2113286-21kworker/u8:1+flush-179:010:10:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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