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2025-12-31 - 14:53
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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 Wed Dec 31, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1963842999081,7cyclictest1986604-21latency_hist20:20:001
1963842999080,7cyclictest2039642-21/usr/sbin/munin23:05:251
1963842999080,7cyclictest2039642-21/usr/sbin/munin23:05:251
1963841998572,10cyclictest2059434-21gpgv00:05:010
1963842998477,5cyclictest2042028-21kworker/u8:0+flush-179:023:15:001
1963841997563,9cyclictest1972028-21kworker/u8:3+flush-179:020:00:010
1963842997468,4cyclictest2004599-21kworker/u8:0+flush-179:021:30:261
1963842997063,5cyclictest1988241-21kworker/u8:2+flush-179:020:35:001
1963842996864,3cyclictest2047654-21kworker/u8:0+events_unbound23:55:231
1963842996860,5cyclictest2049444-21/usr/sbin/munin23:35:251
1963841996860,5cyclictest1979935-21kworker/u8:1+flush-179:020:15:010
1963841996858,8cyclictest2004600-21/usr/sbin/munin21:15:240
1963841996858,8cyclictest2004600-21/usr/sbin/munin21:15:230
1963841996758,7cyclictest1970672-21apt-get19:30:130
1963842996658,5cyclictest2023727-21kworker/u8:0+flush-179:022:20:211
1963842996657,7cyclictest2010382-21kworker/u8:2+flush-179:021:40:221
1963842996556,7cyclictest1986844-21/usr/sbin/munin20:20:221
1963842996457,5cyclictest2047654-21kworker/u8:0+events_unbound00:04:011
1963849996361,1cyclictest0-21swapper/319:20:593
1963841996355,6cyclictest1988197-21latency_hist20:25:020
1963842996258,3cyclictest2031419-21kworker/u8:1+flush-179:023:40:171
1963842996256,4cyclictest1944780-21kworker/u8:0+flush-179:019:10:231
1963841996258,3cyclictest1979935-21kworker/u8:1+events_unbound20:16:410
1963842996054,4cyclictest2061021-21kworker/u8:2+flush-179:000:25:241
1963841996052,6cyclictest2068947-21latency_hist00:35:010
1963842995956,2cyclictest0-21swapper/121:56:581
1963842995951,5cyclictest1993012-21kworker/u8:0+flush-179:020:55:191
1963842995852,5cyclictest2023727-21kworker/u8:0+flush-179:022:30:231
1963841995851,5cyclictest2047654-21kworker/u8:0+flush-179:023:40:000
1963849995750,5cyclictest1973598-21turbostat19:40:003
1963842995753,3cyclictest1965353-21kworker/u8:2+flush-179:019:20:261
196384199571,52cyclictest2061018-21true00:10:000
1963845995653,2cyclictest0-21swapper/219:25:592
1963842995649,5cyclictest2047654-21kworker/u8:0+flush-179:000:35:171
1963842995550,4cyclictest2010382-21kworker/u8:2+events_unbound22:05:001
1963842995548,5cyclictest1988241-21kworker/u8:2+flush-179:021:10:221
1963841995545,8cyclictest1966990-21latency_hist19:20:010
1963842995346,5cyclictest2064191-21latency_hist00:20:011
1963842995246,5cyclictest1972028-21kworker/u8:3+events_unbound20:45:291
1963842995244,6cyclictest1972028-21kworker/u8:3+flush-179:020:10:231
1963842995243,7cyclictest2031688-21/usr/sbin/munin22:40:251
1963842995243,7cyclictest2007017-21kworker/u8:1+flush-179:021:30:001
1963841995245,4cyclictest2020297-21latency_hist22:05:010
1963842995146,4cyclictest2010382-21kworker/u8:2+flush-179:021:50:011
1963842995146,4cyclictest2010382-21kworker/u8:2+flush-179:021:50:001
1963841995142,6cyclictest2013931-21latency_hist21:45:020
1963842995044,5cyclictest2034878-21apt-get22:50:121
1963842995040,8cyclictest266-21systemd-journal20:45:011
1963849994942,5cyclictest2046047-21turbostat23:25:003
1963842994943,4cyclictest1967479-21kworker/u8:1+flush-179:019:25:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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