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2026-05-23 - 17:06
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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 Sat May 23, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28359369911199,9cyclictest2873106-21latency_hist09:05:010
283593699110103,5cyclictest2887690-21latency_hist09:50:010
283593699110103,5cyclictest2887690-21latency_hist09:50:010
28359369910898,7cyclictest2897253-21latency_hist10:20:010
28359369910894,11cyclictest1213033-21systemd-journal11:59:590
2835936991080,106cyclictest1-21systemd10:40:000
28359369910693,10cyclictest2923244-21apt-get11:40:000
28359409910599,4cyclictest2898821-21kworker/u8:1+flush-179:010:30:261
28359409910597,7cyclictest2939466-21kworker/u8:3+flush-179:012:40:001
28359409910498,4cyclictest2920089-21kworker/u8:3+flush-179:012:15:001
28359409910397,4cyclictest2852646-21kworker/u8:1+events_unbound08:05:001
28359369910089,9cyclictest2873603-21/usr/sbin/munin09:05:230
2835940999989,7cyclictest2925096-21latency_hist11:45:011
2835940999791,4cyclictest2910546-21kworker/u8:3+events_unbound11:10:011
2835940999791,4cyclictest2879768-21kworker/u8:1+flush-179:009:30:001
2835940999790,5cyclictest2937835-21latency_hist12:25:021
2835940999691,4cyclictest2876523-21kworker/u8:0+events_unbound10:25:261
2835940999287,4cyclictest2908619-21kworker/u8:1+events_unbound11:55:241
2835940999282,8cyclictest2892730-21apt-get10:05:111
2835940999186,4cyclictest2870919-21kworker/u8:0+flush-179:008:55:261
2835940999182,6cyclictest2898821-21kworker/u8:1+events_unbound10:35:141
2835936999181,7cyclictest2915271-21latency_hist11:15:010
2835940999084,5cyclictest2814660-21kworker/u8:1+flush-179:007:20:011
2835936998981,5cyclictest2939423-21latency_hist12:30:010
2835936998981,5cyclictest2898821-21kworker/u8:1+flush-179:010:30:150
2835940998781,4cyclictest2916915-21kworker/u8:2+events_unbound11:25:181
2835940998778,7cyclictest2921643-21latency_hist11:35:011
2835940998679,5cyclictest2941010-21latency_hist12:35:001
2835936998678,6cyclictest2852411-21latency_hist08:00:020
2835940998580,4cyclictest2876523-21kworker/u8:0+events_unbound09:40:241
2835940998478,5cyclictest2861987-21kworker/u8:3+flush-179:008:30:241
2835940998476,6cyclictest2900668-21kworker/u8:2+flush-179:010:40:201
2835936998479,4cyclictest2845765-21kworker/u8:1+flush-179:007:40:000
2835936998474,7cyclictest2892487-21latency_hist10:05:010
2835940998377,4cyclictest2840596-21latency_hist07:25:021
2835940998277,4cyclictest2920089-21kworker/u8:3+flush-179:012:05:011
2835940998175,4cyclictest2920089-21kworker/u8:3+flush-179:011:50:201
2835940998174,5cyclictest2843762-21kworker/u8:3+flush-179:008:00:001
2835940998075,3cyclictest2910473-21kworker/u8:0+events_unbound11:05:001
2835940998070,8cyclictest2926681-21latency_hist11:50:011
2835936998069,8cyclictest2916915-21kworker/u8:2+flush-179:011:30:230
2835940997971,6cyclictest2870919-21kworker/u8:0+events_unbound09:05:011
2835940997873,4cyclictest2934616-21kworker/u8:1+events_unbound12:25:241
2835940997870,7cyclictest2821074-21kworker/u8:0+flush-179:007:15:001
2835936997869,7cyclictest2821074-21kworker/u8:0+events_unbound07:20:250
2835936997868,8cyclictest2860622-21apt-get08:25:120
2835940997771,5cyclictest2900668-21kworker/u8:2+events_unbound10:45:191
2835940997768,6cyclictest2887725-21kworker/u8:3+events_unbound10:00:221
2835940997768,4cyclictest2908619-21kworker/u8:1+events_unbound11:35:181
2835940997767,8cyclictest510-21rs:main1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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