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2026-06-24 - 22:43
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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 Wed Jun 24, 2026 12:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
191460499135127,6cyclictest1970765-21kworker/u8:0+flush-179:010:05:001
191460499127118,6cyclictest1985350-21latency_hist10:50:011
19146009911199,9cyclictest1964413-21latency_hist09:45:010
191460499110103,5cyclictest1975600-21kworker/u8:1+events_unbound11:00:011
19146009910892,12cyclictest1213033-21systemd-journal11:50:010
19146009910379,13cyclictest1951674-21apt-get09:05:120
19146049910290,9cyclictest1213033-21systemd-journal11:35:011
19146009910293,6cyclictest1213033-21systemd-journal08:20:010
19146009910293,6cyclictest1213033-21systemd-journal08:20:000
1914604999892,4cyclictest1986970-21kworker/u8:2+flush-179:011:10:231
1914604999892,4cyclictest1986970-21kworker/u8:2+flush-179:011:10:221
1914604999386,5cyclictest2007329-21kworker/u8:0+flush-179:012:10:231
1914604999386,5cyclictest1970765-21kworker/u8:0+flush-179:010:15:151
1914604999385,6cyclictest1980854-21diskstats10:35:151
1914604999380,3cyclictest1934699-21kworker/u8:1+flush-179:008:35:261
1914600999282,7cyclictest1940275-21latency_hist08:30:010
1914604999183,6cyclictest2004487-21kworker/u8:2+events_unbound11:55:011
1914600999181,8cyclictest1967836-21apt-get09:55:110
1914604999083,5cyclictest1998121-21kworker/u8:3+flush-179:012:05:251
1914604999083,5cyclictest1975600-21kworker/u8:1+flush-179:011:20:151
1914604999082,6cyclictest2001241-21kworker/u8:2+events_unbound11:40:001
1914604999081,7cyclictest2009258-21kworker/u8:1+flush-179:012:25:011
1914600999081,6cyclictest1916096-21kworker/u8:1+flush-179:007:35:010
1914604998982,5cyclictest1978714-21kworker/u8:3+flush-179:010:50:221
1914604998978,8cyclictest1213033-21systemd-journal07:20:001
1914604998881,5cyclictest1965976-21kworker/u8:1+flush-179:009:55:261
1914604998880,5cyclictest1924097-21latency_hist07:40:001
1914604998879,6cyclictest2007329-21kworker/u8:0+flush-179:012:15:151
1914600998875,10cyclictest1213033-21systemd-journal10:55:000
1914604998777,6cyclictest1956236-21kworker/u8:2+flush-179:009:25:211
1914604998776,8cyclictest1978714-21kworker/u8:3+flush-179:011:10:011
1914604998579,4cyclictest1934699-21kworker/u8:1+flush-179:008:15:211
1914604998579,4cyclictest1934699-21kworker/u8:1+flush-179:008:15:211
1914604998578,4cyclictest1998121-21kworker/u8:3+flush-179:011:40:211
1914600998577,6cyclictest2001262-21latency_hist11:40:010
1914604998376,5cyclictest1998121-21kworker/u8:3+flush-179:011:45:211
1914600998372,7cyclictest1975600-21kworker/u8:1+events_unbound11:30:000
1914604998273,6cyclictest1970811-21kworker/u8:2+events_unbound10:25:221
1914600998173,5cyclictest1975600-21kworker/u8:1+flush-179:011:20:180
1914600998171,8cyclictest1213033-21systemd-journal11:20:000
1914604998072,5cyclictest1977140-21latency_hist10:25:011
1914604997971,5cyclictest1971013-21/usr/sbin/munin10:05:241
1914604997870,6cyclictest1925953-21apt-get07:45:111
1914600997872,4cyclictest1925698-21latency_hist07:45:000
1914600997870,6cyclictest1991967-21apt-get11:10:110
1914600997870,6cyclictest1991967-21apt-get11:10:100
1914604997771,4cyclictest1919558-21apt-get07:25:111
1914604997767,7cyclictest1963008-21cat09:40:021
1914600997763,11cyclictest1993329-21kworker/u8:0+events_unbound11:45:000
1914604997668,5cyclictest2017210-21kworker/u8:3+events_unbound12:35:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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