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2026-07-18 - 09:43
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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 Jul 18, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
258433799142130,8cyclictest2610495-21latency_hist20:30:010
258433799138128,7cyclictest2679777-21latency_hist00:05:010
258433799128118,7cyclictest2605469-21apt-get20:15:000
258433799126115,8cyclictest2672850-21apt-get23:45:010
258434299121108,10cyclictest2595660-21latency_hist19:45:021
25843379911791,17cyclictest2618685-21/usr/sbin/munin20:55:240
258434299112103,7cyclictest2591120-21/usr/sbin/munin19:30:231
258434299112103,6cyclictest2684774-21kworker/u8:0+flush-179:000:25:151
25843429911198,10cyclictest1213033-21systemd-journal22:30:011
258434299111102,6cyclictest2677936-21kworker/u8:3+events_unbound00:05:141
258434299110100,7cyclictest1213033-21systemd-journal20:35:001
25843379910791,14cyclictest2602540-21apt-get20:05:110
25843379910790,14cyclictest2612338-21apt-get20:35:120
25843429910698,6cyclictest2587947-21kworker/u8:0+flush-179:019:45:221
25843429910598,4cyclictest2612073-21kworker/u8:2+flush-179:020:55:241
25843429910597,5cyclictest2674713-21kworker/u8:2+flush-179:000:00:011
25843429910597,5cyclictest2642587-21latency_hist22:10:011
25843429910596,6cyclictest2669641-21latency_hist23:35:001
25843429910595,7cyclictest2602286-21latency_hist20:05:011
25843429910294,6cyclictest2587947-21kworker/u8:0+flush-179:019:25:221
25843379910292,8cyclictest1213033-21systemd-journal22:15:010
25843429910092,6cyclictest2647347-21kworker/u8:0+flush-179:022:25:001
2584337999989,8cyclictest2660355-21apt-get23:05:100
2584337999989,7cyclictest2653779-21kworker/u8:3+flush-179:022:50:210
2584337999986,8cyclictest2671284-21kworker/u8:0+flush-179:023:45:210
2584342999892,4cyclictest2653779-21kworker/u8:3+flush-179:022:50:151
2584342999789,5cyclictest2636218-21kworker/u8:0+flush-179:022:00:171
2584337999791,4cyclictest2587947-21kworker/u8:0+events_unbound19:50:240
2584342999589,4cyclictest2624847-21kworker/u8:2+events_unbound21:20:131
2584342999586,7cyclictest2605970-21apt-get20:15:121
2584337999587,5cyclictest2599079-21kworker/u8:3+flush-179:020:00:150
2584342999384,6cyclictest2637531-21kworker/u8:1+events_unbound21:55:021
2584342999382,8cyclictest2584513-21apt-get19:10:101
2584342999284,6cyclictest2671284-21kworker/u8:0+flush-179:000:00:021
2584342999282,7cyclictest2656940-21kworker/u8:2+flush-179:023:00:221
2584342999182,7cyclictest2645763-21latency_hist22:20:001
2584337999183,6cyclictest2677936-21kworker/u8:3+flush-179:000:05:210
2584337999081,6cyclictest2616863-21latency_hist20:50:010
2584337999080,7cyclictest2636218-21kworker/u8:0+flush-179:021:50:230
2584337999079,8cyclictest2631176-21kworker/u8:3+flush-179:022:00:220
2584342998983,4cyclictest2624847-21kworker/u8:2+flush-179:021:25:171
2584342998782,4cyclictest2636218-21kworker/u8:0+flush-179:022:10:161
2584342998778,7cyclictest2637531-21kworker/u8:1+flush-179:021:55:011
2584337998783,3cyclictest2636218-21kworker/u8:0+flush-179:021:55:270
2584342998679,5cyclictest2587947-21kworker/u8:0+events_unbound19:20:231
2584337998679,5cyclictest2666454-21kworker/u8:2+flush-179:023:30:220
2584337998676,7cyclictest2587947-21kworker/u8:0+flush-179:019:25:210
2584342998575,7cyclictest2671241-21latency_hist23:40:011
2584337998577,6cyclictest2625069-21apt-get21:15:130
2584337998574,9cyclictest1213033-21systemd-journal21:10:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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