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2026-05-15 - 17:54
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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 May 15, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17378939910896,9cyclictest1213033-21systemd-journal11:40:001
1737891999383,8cyclictest1765390-21apt-get08:32:530
1737891999180,9cyclictest1839506-21kworker/u8:2+flush-179:012:35:000
1737893999078,9cyclictest1757170-21latency_hist08:10:011
1737891998781,5cyclictest1776579-21kworker/u8:2+flush-179:009:40:240
1737895998556,27cyclictest0-21swapper/207:17:592
1737891998170,8cyclictest1799649-21/usr/sbin/munin10:20:230
1737891997970,7cyclictest1801034-21kworker/u8:2+flush-179:010:55:010
1737891997870,6cyclictest1768872-21kworker/u8:0+flush-179:008:55:190
1737893997769,6cyclictest1789823-21/usr/sbin/munin09:50:231
1737893997768,7cyclictest1820104-21latency_hist11:25:011
1737891997569,4cyclictest1742541-21kworker/u8:3+flush-179:007:50:150
1737891997568,5cyclictest1787987-21kworker/u8:3+flush-179:009:50:200
1737893997366,5cyclictest1742541-21kworker/u8:3+flush-179:008:15:241
1737891997368,4cyclictest1804159-21kworker/u8:0+events_unbound10:45:010
1737891997366,5cyclictest1768891-21apt-get08:45:120
1737891997363,8cyclictest1760594-21kworker/u8:2+flush-179:008:55:010
1737893997263,6cyclictest1734721-21kworker/u8:2+flush-179:007:35:161
1737893997056,13cyclictest1760594-21kworker/u8:2+flush-179:008:49:551
1737893996962,4cyclictest1742541-21kworker/u8:3+flush-179:008:00:201
1737891996960,7cyclictest1807413-21kworker/u8:3+flush-179:011:05:150
1737891996862,4cyclictest1742541-21kworker/u8:3+flush-179:008:15:170
1737893996757,7cyclictest1760594-21kworker/u8:2+flush-179:008:25:221
1737893996657,7cyclictest1213033-21systemd-journal07:40:531
1737891996659,4cyclictest1784527-21kworker/u8:1+events_unbound09:35:140
1737891996658,5cyclictest1734721-21kworker/u8:2+flush-179:007:30:230
1737893996543,19cyclictest510-21rs:main1
1737891996557,6cyclictest1782957-21latency_hist09:30:020
1737893996455,7cyclictest1783196-21/usr/sbin/munin09:30:231
1737891996357,5cyclictest1823265-21kworker/u8:1+flush-179:011:40:210
1737891996355,5cyclictest1742541-21kworker/u8:3+flush-179:008:05:160
1737891996354,6cyclictest1776589-21latency_hist09:10:010
1737893996155,4cyclictest1787987-21kworker/u8:3+flush-179:010:15:151
1737893996153,6cyclictest1213033-21systemd-journal07:58:521
1737893996152,6cyclictest1813737-21latency_hist11:05:011
1737891996155,4cyclictest1793298-21apt-get10:00:120
173789899600,58cyclictest0-21swapper/307:17:593
1737893996055,4cyclictest1776579-21kworker/u8:2+flush-179:009:15:261
1737893996050,7cyclictest1833082-21kworker/u8:3+events_unbound12:30:131
1737891996055,4cyclictest1823265-21kworker/u8:1+flush-179:011:54:550
1737893995952,5cyclictest1788001-21latency_hist09:45:011
1737893995948,8cyclictest1807413-21kworker/u8:3+flush-179:010:55:191
1737891995951,4cyclictest1815356-21kworker/u8:1+flush-179:011:15:170
1737891995947,5cyclictest1791217-21kworker/u8:2+events_unbound10:10:240
1737893995852,4cyclictest1737791-21kworker/u8:1+events_unbound07:10:231
1737891995852,4cyclictest1734721-21kworker/u8:2+flush-179:007:35:530
1737891995851,5cyclictest1812184-21kworker/u8:0+flush-179:011:30:170
1737891995851,5cyclictest1213033-21systemd-journal07:45:000
1737891995850,6cyclictest1805768-21latency_hist10:40:020
1737891995848,8cyclictest1812404-21apt-get11:00:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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