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2026-09-11 - 12:01
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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 Sep 11, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
102702099137125,10cyclictest1075239-21latency_hist21:40:010
102702599126120,4cyclictest1065404-21kworker/u8:0+flush-179:022:20:151
102702599124119,4cyclictest1022471-21kworker/u8:3+events_unbound19:50:231
102702099124115,6cyclictest1077102-21latency_hist21:45:010
102702599121116,4cyclictest1047634-21kworker/u8:2+events_unbound20:15:261
102702099121114,5cyclictest1042179-21kworker/u8:0+flush-179:020:30:240
102702599119109,7cyclictest1102820-21latency_hist23:05:011
102702599118113,4cyclictest1065404-21kworker/u8:0+events_unbound22:50:291
1027020991181,115cyclictest1-21systemd22:50:000
102702599115109,4cyclictest1042179-21kworker/u8:0+events_unbound20:30:161
102702099114103,8cyclictest1213033-21systemd-journal20:50:000
102702599113108,4cyclictest1109220-21kworker/u8:3+events_unbound23:30:271
102702599113107,4cyclictest1108640-21kworker/u8:2+events_unbound23:40:171
102702599112100,10cyclictest1112350-21kworker/u8:1+flush-179:023:50:001
102702599111106,3cyclictest1065404-21kworker/u8:0+flush-179:023:25:201
102702099111102,7cyclictest1120374-21kworker/u8:1+flush-179:000:00:020
102702599110105,4cyclictest1070512-21kworker/u8:3+events_unbound21:45:241
102702099110100,7cyclictest1065698-21latency_hist21:10:000
102702599109104,4cyclictest1061151-21kworker/u8:1+events_unbound21:00:221
102702599109102,5cyclictest1065404-21kworker/u8:0+flush-179:022:00:151
10270259910898,7cyclictest1072062-21latency_hist21:30:011
10270209910896,9cyclictest1088234-21latency_hist22:20:020
10270259910793,10cyclictest1055643-21apt-get20:40:001
102702599107102,4cyclictest1065404-21kworker/u8:0+events_unbound23:20:261
102702599107102,4cyclictest1065404-21kworker/u8:0+events_unbound21:10:131
10270209910796,8cyclictest1213033-21systemd-journal22:55:000
102702599106101,4cyclictest1070445-21kworker/u8:2+events_unbound21:50:241
10270209910693,11cyclictest1129945-21apt-get00:30:000
10270259910595,8cyclictest1123816-21apt-get00:10:141
10270259910588,15cyclictest1120311-21latency_hist00:00:021
10270259910494,8cyclictest1213033-21systemd-journal22:50:011
10270259910398,3cyclictest1055055-21kworker/u8:2+events_unbound20:55:201
10270259910397,4cyclictest1093257-21kworker/u8:2+flush-179:022:40:151
10270209910391,10cyclictest1213033-21systemd-journal21:55:010
10270259910196,4cyclictest1047634-21kworker/u8:2+events_unbound20:20:231
10270259910096,3cyclictest1091661-21kworker/u8:3+events_unbound22:34:561
10270259910094,4cyclictest1061151-21kworker/u8:1+events_unbound21:05:171
1027025999994,4cyclictest1065404-21kworker/u8:0+events_unbound22:25:151
1027025999990,3cyclictest1065404-21kworker/u8:0+flush-179:022:35:191
1027025999893,4cyclictest1117159-21kworker/u8:3+events_unbound23:50:261
1027025999793,3cyclictest1128319-21kworker/u8:0+events_unbound00:35:161
1027025999786,9cyclictest1112613-21apt-get23:35:121
1027025999692,3cyclictest1100292-21kworker/u8:1+events_unbound23:05:241
1027025999686,4cyclictest1108640-21kworker/u8:2+events_unbound00:00:121
1027025999591,3cyclictest1128319-21kworker/u8:0+events_unbound00:25:251
1027020999584,9cyclictest1070477-21latency_hist21:25:010
1027025999489,4cyclictest1065404-21kworker/u8:0+events_unbound21:35:211
1027025999485,7cyclictest1028568-21latency_hist19:15:021
1027025999388,4cyclictest1049320-21kworker/u8:3+events_unbound20:25:161
1027020999381,10cyclictest1085306-21apt-get22:10:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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