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2026-08-01 - 09:06
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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 Aug 01, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
292016599144114,15cyclictest1213033-21systemd-journal22:15:000
292016599141130,8cyclictest3003185-21latency_hist23:25:000
292016599139128,8cyclictest2924907-21latency_hist19:25:010
292016599139127,9cyclictest3022882-21latency_hist00:30:010
292016599139127,9cyclictest2963365-21latency_hist21:25:020
292016699134124,7cyclictest2983554-21kworker/u8:0+flush-179:023:00:011
292016599127117,7cyclictest2969730-21latency_hist21:45:020
292016699121111,7cyclictest3005032-21latency_hist23:30:011
292016599117101,13cyclictest2974816-21latency_hist22:00:020
292016599115104,7cyclictest2968133-21latency_hist21:40:010
292016699114105,6cyclictest2932860-21latency_hist19:50:001
292016699114103,7cyclictest2937642-21latency_hist20:05:011
292016599114107,4cyclictest2983554-21kworker/u8:0+flush-179:023:10:250
292016599114106,6cyclictest3021268-21kworker/u8:1+events_unbound00:30:240
292016699112100,10cyclictest2972911-21apt-get21:54:251
292016699110100,7cyclictest2931274-21latency_hist19:45:011
29201669910682,21cyclictest2969774-21kworker/u8:0+events_unbound22:05:011
29201669910591,11cyclictest1213033-21systemd-journal00:15:001
29201659910495,7cyclictest2981706-21latency_hist22:20:000
29201659910494,8cyclictest510-21rs:main0
29201669910393,8cyclictest2937896-21apt-get20:05:141
29201659910395,6cyclictest2949025-21/usr/sbin/munin20:40:220
29201669910292,8cyclictest1213033-21systemd-journal22:55:011
29201669910089,8cyclictest1213033-21systemd-journal00:04:001
29201669910068,28cyclictest2918629-21kworker/u8:2+flush-179:019:30:001
2920166999987,8cyclictest2984947-21kworker/u8:3+events_unbound22:35:011
2920166999887,8cyclictest3012985-21latency_hist23:55:011
2920165999884,9cyclictest2936085-21true20:00:010
2920166999684,9cyclictest1213033-21systemd-journal21:29:591
2920165999680,12cyclictest1213033-21systemd-journal21:05:000
2920165999586,7cyclictest2953839-21kworker/u8:2+flush-179:020:55:210
2920165999283,7cyclictest510-21rs:main0
2920165999281,8cyclictest510-21rs:main0
2920165998979,8cyclictest2952475-21apt-get20:50:120
2920166998877,6cyclictest2983554-21kworker/u8:0+flush-179:022:35:161
2920166998775,9cyclictest2983839-21diskstats22:25:141
2920165998674,9cyclictest2944006-21latency_hist20:25:010
2920165998577,5cyclictest2964987-21kworker/u8:1+flush-179:021:50:010
2920166998373,8cyclictest2962036-21apt-get21:20:111
2920165998376,5cyclictest3005269-21kworker/u8:2+flush-179:023:45:220
2920165998277,3cyclictest2958570-21kworker/u8:1+flush-179:021:10:160
2920165998276,5cyclictest3011446-21kworker/u8:3+events_unbound00:15:250
2920165998275,5cyclictest2983554-21kworker/u8:0+events_unbound22:35:230
2920165998273,6cyclictest2926493-21latency_hist19:30:010
2920165998271,9cyclictest1213033-21systemd-journal19:54:590
2920165998268,11cyclictest1213033-21systemd-journal19:40:000
2920165998073,4cyclictest2953839-21kworker/u8:2+events_unbound21:30:180
2920165998066,11cyclictest1213033-21systemd-journal23:30:230
2920166997971,5cyclictest2978253-21latency_hist22:10:021
2920165997970,7cyclictest2960206-21kworker/u8:3+flush-179:021:25:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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