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2025-12-25 - 04:44
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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
Characteristics of the 50 highest latencies:
System rackbslot1.osadl.org (updated Wed Dec 24, 2025 12:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20209452222167,13sleep10-21swapper/107:09:281
20206832200172,18sleep30-21swapper/307:06:143
20208412196168,18sleep20-21swapper/207:08:092
20207962194170,14sleep00-21swapper/007:07:350
2021172997368,2cyclictest247562-13Chrome_ChildIOT10:45:021
2021172996750,5cyclictest2053026-21/usr/share/muni07:40:151
2021169996761,4cyclictest2150891-21kworker/u8:2+events_unbound09:45:010
2021172996258,3cyclictest2273614-21kworker/u8:0+events_unbound11:30:091
2021172996258,3cyclictest2273614-21kworker/u8:0+events_unbound11:30:091
2021169995847,9cyclictest2275027-21latency_hist11:15:010
2021169995840,11cyclictest3125688-21Chrome_ChildIOT07:21:100
2021173995750,5cyclictest2280475-21/usr/share/muni11:20:162
2021173995750,5cyclictest2280475-21/usr/share/muni11:20:162
2021169995749,7cyclictest2150891-21kworker/u8:2+flush-179:009:35:120
2021175995652,3cyclictest2341278-21kworker/u8:3+events_unbound12:25:293
2021175995447,5cyclictest3125687-21ThreadPoolForeg07:10:203
2021172995445,8cyclictest2310906-21kworker/u8:2+flush-179:012:05:171
2021173995349,3cyclictest2235776-21kworker/u8:3+flush-179:011:05:002
2021172995147,3cyclictest3125724-21ThreadPoolForeg10:54:151
2021172995135,4cyclictest2026410-21/usr/share/muni07:15:011
2021175995045,3cyclictest2310069-21munin-limits11:45:303
2021172995046,3cyclictest2156265-21munin-update09:20:311
2021169995043,5cyclictest2316413-21/usr/share/muni11:55:190
2021169995039,9cyclictest2285320-21munin-update11:25:060
2021173994945,3cyclictest2077053-21kworker/u8:4+events_unbound08:35:242
2021173994945,3cyclictest2068060-21kworker/u8:0+flush-179:008:00:162
2021172994945,2cyclictest2305923-13chrome11:45:021
2021172994943,5cyclictest2359029-21ntpq12:35:151
2021175994842,4cyclictest3125724-21ThreadPoolForeg10:50:003
2021173994842,4cyclictest2258596-21munin-limits10:55:362
2021172994844,3cyclictest76405-21systemd-journal09:50:011
2021175994742,4cyclictest3125724-21ThreadPoolForeg07:40:003
2021173994743,3cyclictest2196549-21kworker/u8:5+flush-179:010:35:062
2021173994742,3cyclictest2140166-21kworker/u8:1+flush-179:009:10:062
2021173994742,3cyclictest2063371-21/usr/share/muni07:50:142
2021173994735,11cyclictest2020793-21kworker/2:1+pm08:21:192
2021172994741,5cyclictest247516-21Chrome_ChildIOT10:40:341
2021175994642,3cyclictest2295527-21munin-update11:35:343
2021175994641,3cyclictest2032582-21/usr/share/muni07:20:143
2021173994644,1cyclictest2181658-21kworker/2:0+pm10:27:012
2021173994643,2cyclictest2020793-21kworker/2:1+pm09:32:152
2021173994639,5cyclictest2238506-21/usr/share/muni10:40:132
2021172994643,3cyclictest2032367-21kworker/u8:3+flush-179:007:35:311
2021172994641,4cyclictest3125724-21ThreadPoolForeg09:15:301
2021172994641,4cyclictest3125724-21ThreadPoolForeg09:15:301
2021172994641,4cyclictest247561-21ThreadPoolForeg08:25:341
2021169994639,5cyclictest2357720-21/usr/share/muni12:35:090
2021175994542,2cyclictest2279822-21kworker/u8:1+flush-179:011:30:223
2021175994542,2cyclictest2279822-21kworker/u8:1+flush-179:011:30:223
2021173994539,5cyclictest2021318-21/usr/share/muni07:10:052
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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