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2026-07-17 - 07:38
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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 Fri Jul 17, 2026 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
407102799135129,4cyclictest4075929-21kworker/u8:0+events_unbound19:40:251
407102799131123,5cyclictest4087090-21latency_hist20:00:021
407102799131120,8cyclictest4128726-21latency_hist22:10:011
407102799125117,6cyclictest4114197-21kworker/u8:0+events_unbound21:30:021
407102799124118,4cyclictest4142022-21kworker/u8:3+events_unbound23:25:251
407102799124111,10cyclictest1213033-21systemd-journal22:20:011
407102799124111,10cyclictest1213033-21systemd-journal22:20:001
407102799121113,5cyclictest4110954-21latency_hist21:15:001
407102799120116,3cyclictest4136604-21kworker/u8:1+flush-179:022:40:261
407102799120113,5cyclictest4174527-21kworker/u8:3+flush-179:000:30:241
407102799120113,5cyclictest4173340-21kworker/u8:1+events_unbound00:30:001
407102599118108,7cyclictest4141978-21latency_hist22:50:010
407102599118108,7cyclictest4141978-21latency_hist22:50:010
407102599115107,5cyclictest4136604-21kworker/u8:1+flush-179:022:30:240
407102799114108,5cyclictest4093512-21kworker/u8:3+events_unbound20:35:251
407102799114106,5cyclictest4096675-21kworker/u8:2+events_unbound20:40:241
407102799114102,8cyclictest4070925-21kworker/u8:2+events_unbound19:10:201
407102799114102,8cyclictest4070925-21kworker/u8:2+events_unbound19:10:201
407102599114106,5cyclictest4075929-21kworker/u8:0+flush-179:019:40:020
407102599113105,5cyclictest4093512-21kworker/u8:3+flush-179:020:55:160
407102799112104,6cyclictest4093512-21kworker/u8:3+events_unbound21:40:211
40710259911298,12cyclictest1213033-21systemd-journal19:20:000
407102799111102,6cyclictest4131977-21kworker/u8:3+flush-179:022:25:221
407102799111102,6cyclictest4070925-21kworker/u8:2+events_unbound19:20:191
407102799111100,8cyclictest4145167-21latency_hist23:00:011
40710259911197,11cyclictest1213033-21systemd-journal00:30:010
40710279911098,8cyclictest4079111-21kworker/u8:3+events_unbound19:35:141
407102799110103,5cyclictest4142022-21kworker/u8:3+events_unbound23:20:231
407102799110103,4cyclictest4075929-21kworker/u8:0+flush-179:019:45:231
407102599110100,6cyclictest4123945-21latency_hist21:55:010
40710279910996,6cyclictest4093512-21kworker/u8:3+flush-179:021:00:241
407102799109103,4cyclictest4088659-21kworker/u8:0+events_unbound20:05:261
40710279910896,6cyclictest4070866-21kworker/u8:1+events_unbound19:30:021
407102799108102,5cyclictest4106242-21kworker/u8:1+flush-179:021:35:261
407102799107101,4cyclictest4121882-21kworker/u8:2+events_unbound22:00:231
40710279910699,5cyclictest4121882-21kworker/u8:2+events_unbound21:55:011
40710279910598,5cyclictest4088659-21kworker/u8:0+flush-179:020:20:251
40710279910596,6cyclictest4132436-21apt-get22:20:111
40710279910590,5cyclictest4088659-21kworker/u8:0+events_unbound20:10:191
40710279910499,3cyclictest4161321-21kworker/u8:3+events_unbound00:00:181
407102799104100,3cyclictest4082303-21kworker/u8:1+events_unbound20:00:161
40710259910498,4cyclictest4164773-40logrotate00:00:010
40710279910292,7cyclictest4121882-21kworker/u8:2+flush-179:022:15:001
40710259910296,4cyclictest4154948-21kworker/u8:0+events_unbound23:45:010
40710279910196,4cyclictest4163172-21kworker/u8:0+flush-179:023:55:251
40710259910194,4cyclictest4173340-21kworker/u8:1+flush-179:000:25:250
40710279910095,4cyclictest4169842-21kworker/u8:2+events_unbound00:35:251
40710279910095,4cyclictest4169842-21kworker/u8:2+events_unbound00:35:251
40710279910091,7cyclictest4106242-21kworker/u8:1+events_unbound21:25:141
40710279910089,7cyclictest4103005-21latency_hist20:50:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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