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2026-09-06 - 13:47
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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 Sep 06, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
410572999158148,6cyclictest8062-21kworker/u8:1+flush-179:000:25:010
410572999153142,8cyclictest4192309-21kworker/u8:0+events_unbound00:10:010
410572999153141,9cyclictest4157061-21latency_hist21:50:010
410573199149137,9cyclictest1213033-21systemd-journal19:20:011
410572999139126,10cyclictest1213033-21systemd-journal19:25:010
410573199136126,7cyclictest4111982-21latency_hist19:30:001
410573199131120,8cyclictest4166619-21latency_hist22:20:001
410572999129121,6cyclictest4113545-21kworker/u8:3+events_unbound19:45:260
410572999129121,5cyclictest4123362-21kworker/u8:3+flush-179:020:05:000
410573199128117,8cyclictest4188891-21latency_hist23:30:001
410572999123108,11cyclictest4179331-21latency_hist23:00:000
410572999121114,5cyclictest4176436-21kworker/u8:1+flush-179:023:10:170
410572999119107,9cyclictest4144308-21/usr/sbin/munin21:10:230
410572999117110,6cyclictest4137740-21kworker/u8:1+events_unbound21:20:010
410572999116105,8cyclictest4137740-21kworker/u8:1+flush-179:020:55:010
410572999115106,6cyclictest4152282-21latency_hist21:35:010
410572999115103,9cyclictest4160491-21kworker/u8:1+flush-179:022:00:180
410572999114107,5cyclictest4128123-21kworker/u8:2+flush-179:020:20:000
410573199113100,9cyclictest8065-21kworker/u8:3+flush-179:000:20:261
41057319911197,10cyclictest4126534-21kworker/u8:0+flush-179:020:50:261
410573199110101,7cyclictest4180942-21latency_hist23:05:011
410572999110100,7cyclictest4190477-21latency_hist23:35:000
41057319910998,9cyclictest4113826-21apt-get19:35:121
41057299910898,7cyclictest4142529-21kworker/u8:2+flush-179:021:25:210
410572999108100,5cyclictest4132927-21latency_hist20:35:000
410572999107101,4cyclictest4187281-21kworker/u8:2+flush-179:023:25:160
41057319910697,6cyclictest4182524-21latency_hist23:10:001
41057319910695,8cyclictest4118067-21kworker/u8:1+flush-179:020:00:171
41057299910697,6cyclictest4192309-21kworker/u8:0+events_unbound23:50:250
410572999106100,4cyclictest4187348-21kworker/u8:3+flush-179:023:45:190
41057319910594,8cyclictest4163665-21/usr/sbin/munin22:10:251
41057319910394,6cyclictest4168464-21apt-get22:25:121
41057299910396,5cyclictest4137740-21kworker/u8:1+flush-179:021:00:260
41057299910292,8cyclictest4126534-21kworker/u8:0+events_unbound20:45:000
41057299910196,4cyclictest8065-21kworker/u8:3+flush-179:000:25:270
41057299910192,7cyclictest2706-21kworker/u8:1+flush-179:000:00:270
41057299910086,8cyclictest4187348-21kworker/u8:3+events_unbound23:35:020
4105731999988,8cyclictest4107201-21latency_hist19:15:011
4105729999993,4cyclictest4118067-21kworker/u8:1+events_unbound19:55:000
4105729999991,6cyclictest4108772-21kworker/u8:1+flush-179:019:30:200
4105729999892,4cyclictest4192309-21kworker/u8:0+flush-179:023:55:260
4105729999889,6cyclictest4120449-21apt-get19:55:120
4105731999782,12cyclictest4126534-21kworker/u8:0+events_unbound20:40:001
4105729999790,4cyclictest4147310-21kworker/u8:3+flush-179:021:20:260
4105729999789,6cyclictest8065-21kworker/u8:3+flush-179:000:15:170
4105729999690,4cyclictest4166860-21kworker/u8:1+flush-179:022:30:200
4105729999589,4cyclictest4118067-21kworker/u8:1+flush-179:020:10:180
4105729999588,5cyclictest2967323-21kworker/u8:0+flush-179:019:14:550
4105731999485,6cyclictest4158646-21latency_hist21:55:011
4105731999477,13cyclictest1213033-21systemd-journal00:40:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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