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2025-11-25 - 23:26
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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 Tue Nov 25, 2025 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17931609910190,8cyclictest1867283-21latency_hist11:00:010
17931609910094,5cyclictest1788710-21kworker/u8:0+flush-179:007:20:010
17931609910094,5cyclictest1788710-21kworker/u8:0+flush-179:007:20:000
1793160998371,9cyclictest1864109-21latency_hist10:50:010
1793160998070,8cyclictest1857987-21/usr/sbin/munin10:30:250
1793160997766,8cyclictest1868085-21journal-offline11:00:190
1793162997469,4cyclictest1831787-21apt-get09:10:041
1793162997469,4cyclictest1831787-21apt-get09:10:031
1793160997468,3cyclictest1851106-21kworker/u8:0+events_unbound10:25:130
1793162997262,8cyclictest1839985-21latency_hist09:35:011
1793160997266,4cyclictest1861179-21kworker/u8:3+events_unbound10:45:010
1793162997161,7cyclictest1875253-21latency_hist11:25:011
1793160996962,4cyclictest1867538-21kworker/u8:2+flush-179:011:20:010
1793160996860,5cyclictest1793075-21kworker/u8:3+events_unbound07:40:010
1793160996760,5cyclictest1807417-21kworker/u8:1+flush-179:008:10:250
1793162996663,2cyclictest0-21swapper/108:06:001
1793160996660,4cyclictest1818765-21kworker/u8:2+flush-179:008:30:170
1793160996557,5cyclictest1873701-21kworker/u8:1+events_unbound11:40:010
1793166996458,4cyclictest1868891-21turbostat11:05:003
179316599630,61cyclictest0-21swapper/207:48:002
179316599630,61cyclictest0-21swapper/207:47:592
1793160996355,6cyclictest1809245-21apt-get08:00:140
1793160996251,8cyclictest1854816-21/usr/sbin/munin10:20:230
1793160996154,5cyclictest1892973-21kworker/u8:0+events_unbound12:20:290
1793160996154,5cyclictest1884832-21kworker/u8:2+flush-179:012:30:010
1793160996153,5cyclictest1861179-21kworker/u8:3+flush-179:011:05:200
1793162996050,7cyclictest1793020-21latency_hist07:10:011
1793162995953,4cyclictest1793075-21kworker/u8:3+events_unbound07:50:191
1793160995953,5cyclictest1830425-21kworker/u8:1+events_unbound09:15:250
1793160995953,4cyclictest1836295-21kworker/u8:3+flush-179:009:40:220
1793160995948,8cyclictest1872059-21latency_hist11:15:010
1793162995843,14cyclictest1839973-21kworker/u8:1+flush-179:010:45:001
1793160995852,5cyclictest1793075-21kworker/u8:3+flush-179:007:25:210
1793160995846,9cyclictest1811118-21diskstats08:05:170
1793160995846,5cyclictest1821873-21kworker/u8:3+events_unbound09:00:000
1793162995755,1cyclictest0-21swapper/108:35:591
1793162995751,4cyclictest723-21Xorg11:47:591
1793162995751,4cyclictest723-21Xorg11:47:591
1793162995748,7cyclictest1890061-21/usr/sbin/munin12:10:171
1793166995650,5cyclictest1891427-21turbostat12:15:013
1793166995649,4cyclictest1799431-21turbostat07:29:593
1793162995645,9cyclictest1843719-21diskstats09:45:171
1793160995649,5cyclictest1836295-21kworker/u8:3+flush-179:010:05:120
1793160995648,5cyclictest1801035-21kworker/u8:2+events_unbound07:45:240
1793160995648,5cyclictest1801035-21kworker/u8:2+events_unbound07:45:230
1793162995545,7cyclictest1835465-21/usr/sbin/munin09:20:231
1793162995545,7cyclictest1801000-21latency_hist07:35:011
1793162995543,9cyclictest1889565-21latency_hist12:10:011
1793160995543,9cyclictest271-21systemd-journal11:25:000
1793160995448,4cyclictest1873701-21kworker/u8:1+flush-179:011:30:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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