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2026-08-16 - 22:53
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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 Sun Aug 16, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304430799155145,7cyclictest3117158-21latency_hist10:55:001
304430799152141,8cyclictest3060425-21latency_hist08:00:021
304430799148137,8cyclictest3066788-21latency_hist08:20:021
304430399146135,7cyclictest3128803-21kworker/u8:3+flush-179:011:35:010
304430799143133,7cyclictest3125141-21latency_hist11:20:011
304430799142131,7cyclictest3055656-21latency_hist07:45:011
304430399140129,8cyclictest3143141-21latency_hist12:15:020
304430399134124,7cyclictest3073163-21apt-get08:40:010
304430399123112,8cyclictest3118758-21latency_hist11:00:000
304430799122113,6cyclictest3108948-21latency_hist10:30:011
304430799121112,6cyclictest3104426-21kworker/u8:2+flush-179:010:20:001
304430399119109,7cyclictest3063864-21kworker/u8:1+flush-179:008:45:170
304430799118110,5cyclictest3121938-21latency_hist11:10:011
304430799118106,8cyclictest3143377-21kworker/u8:2+flush-179:012:20:221
304430399118105,10cyclictest3045811-21latency_hist07:15:020
304430399118105,10cyclictest3045811-21latency_hist07:15:010
304430399115108,4cyclictest3055704-21kworker/u8:3+flush-179:007:55:250
304430399114104,6cyclictest3131973-21kworker/u8:2+flush-179:011:50:230
304430399113103,7cyclictest3063864-21kworker/u8:1+flush-179:008:20:200
304430399111101,6cyclictest3085730-21kworker/u8:0+events_unbound09:55:010
30443039910998,6cyclictest3040908-21kworker/u8:1+flush-179:007:45:260
304430399109101,6cyclictest3138334-21kworker/u8:0+flush-179:012:25:210
304430399109101,5cyclictest3093012-21kworker/u8:1+flush-179:009:40:220
30443079910884,21cyclictest510-21rs:main1
304430399108100,6cyclictest3085730-21kworker/u8:0+flush-179:009:20:220
30443039910699,4cyclictest3052420-21kworker/u8:2+events_unbound07:35:240
30443039910696,7cyclictest1213033-21systemd-journal09:35:010
30443039910694,9cyclictest3068421-21kworker/u8:0+flush-179:008:25:220
3044303991060,101cyclictest1-21systemd11:50:000
30443079910496,5cyclictest3148178-21apt-get12:30:111
30443039910491,11cyclictest3078443-21latency_hist08:55:010
30443079910393,8cyclictest3056197-21diskstats07:45:161
30443079910392,7cyclictest3080852-21diskstats09:00:161
30443039910294,5cyclictest3104426-21kworker/u8:2+flush-179:010:35:180
30443039910294,5cyclictest3085730-21kworker/u8:0+events_unbound10:09:590
30443039910090,7cyclictest3100998-21latency_hist10:05:010
30443039910090,7cyclictest3100998-21latency_hist10:05:010
3044303999987,8cyclictest3063606-21latency_hist08:10:000
3044303999790,4cyclictest3131973-21kworker/u8:2+flush-179:011:40:200
3044303999587,5cyclictest3049243-21kworker/u8:0+flush-179:007:25:000
3044307999384,7cyclictest3055704-21kworker/u8:3+flush-179:008:05:211
3044303999284,4cyclictest3042898-21kworker/u8:2+flush-179:007:15:180
3044303999283,6cyclictest3049243-21kworker/u8:0+flush-179:007:25:240
3044307999184,4cyclictest3063864-21kworker/u8:1+flush-179:008:40:171
3044303999184,5cyclictest3133841-21kworker/u8:1+flush-179:011:55:180
3044303999182,6cyclictest3085730-21kworker/u8:0+flush-179:009:55:220
3044303999083,5cyclictest3120355-21latency_hist11:05:010
3044303998981,5cyclictest3125093-21kworker/u8:1+flush-179:011:25:170
3044303998980,7cyclictest3138640-21apt-get12:00:130
3044303998880,5cyclictest3085730-21kworker/u8:0+events_unbound09:30:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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