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2026-08-03 - 11:37
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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 Aug 03, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
417968499146135,9cyclictest93217-21apt-get00:40:010
417968799140133,5cyclictest50947-21kworker/u8:0+flush-179:022:35:011
417968499135124,8cyclictest65555-21latency_hist23:15:020
417968799129119,7cyclictest18093-21apt-get20:50:001
417968499124112,9cyclictest34531-21latency_hist21:40:010
417968499124111,10cyclictest1213033-21systemd-journal00:30:010
417968799122115,5cyclictest36155-21kworker/u8:2+flush-179:022:25:011
417968799121113,6cyclictest41138-21kworker/u8:1+flush-179:022:10:011
417968799121108,11cyclictest4184359-21latency_hist19:25:011
417968799121108,11cyclictest4184359-21latency_hist19:25:011
417968799120115,4cyclictest29725-21kworker/u8:0+flush-179:021:30:001
417968799119112,6cyclictest78588-21kworker/u8:3+flush-179:000:20:011
417968799119111,6cyclictest10356-21kworker/u8:0+flush-179:021:15:151
417968799119111,6cyclictest10356-21kworker/u8:0+flush-179:021:15:151
417968799116100,15cyclictest18059-21kworker/u8:1+flush-179:021:00:251
417968499115108,5cyclictest24944-21kworker/u8:2+flush-179:021:10:240
417968499115108,5cyclictest24944-21kworker/u8:2+flush-179:021:10:240
4179684991150,111cyclictest1-21systemd23:35:010
417968799114103,8cyclictest4187768-21kworker/u8:1+events_unbound20:20:001
417968799113105,5cyclictest4194201-21kworker/u8:2+events_unbound20:00:011
417968499113101,9cyclictest80178-40mandb00:00:020
417968499113101,9cyclictest1213033-21systemd-journal00:25:010
417968799112106,4cyclictest4190451-21kworker/u8:0+events_unbound19:50:001
41796879910997,8cyclictest4179536-21kworker/u8:1+flush-179:019:10:271
41796879910993,6cyclictest78588-21kworker/u8:3+events_unbound00:09:591
41796849910796,8cyclictest4186205-21latency_hist19:30:000
41796849910796,8cyclictest4186205-21latency_hist19:30:000
41796879910690,7cyclictest58312-21kworker/u8:0+flush-179:022:55:011
417968799106100,4cyclictest71959-21kworker/u8:0+flush-179:023:55:151
41796849910696,7cyclictest37707-21latency_hist21:50:010
41796849910496,6cyclictest62636-21apt-get23:05:110
41796879910395,5cyclictest71959-21kworker/u8:0+flush-179:023:35:231
41796849910297,3cyclictest36155-21kworker/u8:2+flush-179:021:50:240
41796849910293,6cyclictest42489-21latency_hist22:05:020
41796879910193,5cyclictest4187779-21kworker/u8:3+events_unbound19:35:231
41796879910191,6cyclictest66595-21kworker/u8:4+flush-179:023:15:261
4179687999989,8cyclictest36155-21kworker/u8:2+flush-179:022:40:001
4179687999988,8cyclictest13271-21kworker/u8:3+flush-179:020:40:261
4179687999789,5cyclictest78588-21kworker/u8:3+events_unbound00:25:251
4179684999788,6cyclictest82069-21latency_hist00:05:020
4179687999689,4cyclictest29725-21kworker/u8:0+events_unbound21:45:211
4179687999686,8cyclictest4190451-21kworker/u8:0+flush-179:019:40:221
4179687999686,7cyclictest55479-21kworker/u8:1+events_unbound22:55:261
4179687999589,5cyclictest55479-21kworker/u8:1+flush-179:022:44:551
4179684999581,11cyclictest1213033-21systemd-journal22:50:000
4179684999579,13cyclictest55493-21latency_hist22:45:010
4179687999486,5cyclictest24944-21kworker/u8:2+flush-179:021:20:141
4179687999485,7cyclictest12333-21kworker/u8:2+events_unbound20:30:251
4179687999485,6cyclictest86896-21kworker/u8:2+flush-179:000:30:271
4179687999383,7cyclictest36155-21kworker/u8:2+flush-179:021:50:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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