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2026-05-18 - 15:31
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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 Mon May 18, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16377899910494,7cyclictest1725568-21latency_hist11:40:010
16377929910291,7cyclictest1744905-21kworker/u8:2+flush-179:012:40:001
16377899910190,8cyclictest1700909-21latency_hist10:25:010
16377899910090,7cyclictest1715749-21latency_hist11:10:000
1637792999588,5cyclictest1688409-21kworker/u8:0+events_unbound10:05:011
1637792999586,6cyclictest1641928-21kworker/u8:1+flush-179:007:45:001
1637792999282,7cyclictest1668218-21kworker/u8:2+flush-179:009:00:241
1637792999276,5cyclictest1707776-21kworker/u8:0+flush-179:011:05:251
1637792999180,8cyclictest1683934-21diskstats09:30:151
1637792999078,8cyclictest1213033-21systemd-journal10:19:551
1637792998980,7cyclictest1653916-21apt-get08:00:011
1637792998980,6cyclictest1649107-21kworker/u8:2+flush-179:007:45:201
1637792998580,3cyclictest1712618-21kworker/u8:1+flush-179:012:35:001
1637792998580,3cyclictest1712618-21kworker/u8:1+flush-179:012:34:591
1637792998580,3cyclictest1682429-21kworker/u8:3+flush-179:010:30:161
1637792998577,6cyclictest1741742-21latency_hist12:30:021
1637789998572,10cyclictest1641928-21kworker/u8:1+flush-179:008:30:220
1637792998475,7cyclictest1671665-21latency_hist08:55:011
1637792998376,4cyclictest1707776-21kworker/u8:0+events_unbound11:15:191
1637792998273,6cyclictest1715784-21kworker/u8:2+flush-179:011:20:151
1637789998278,3cyclictest1682429-21kworker/u8:3+events_unbound09:40:230
1637792998175,4cyclictest1639536-21apt-get07:15:121
1637789998171,7cyclictest1688409-21kworker/u8:0+events_unbound10:00:150
1637792998075,4cyclictest1682429-21kworker/u8:3+flush-179:009:29:551
1637792998070,7cyclictest1662124-21latency_hist08:25:011
1637792997666,8cyclictest510-21rs:main1
1637789997667,6cyclictest1740156-21latency_hist12:25:000
1637792997467,4cyclictest1712618-21kworker/u8:1+flush-179:011:00:141
1637789997470,3cyclictest1670046-21kworker/u8:0+events_unbound09:01:580
1637792997368,4cyclictest1697757-21kworker/u8:2+flush-179:010:49:551
1637792997364,6cyclictest1728746-21latency_hist11:50:011
1637792997358,13cyclictest1682429-21kworker/u8:3+flush-179:010:40:211
1637792997261,9cyclictest1735629-21apt-get12:10:111
1637789997268,3cyclictest1728728-21kworker/u8:0+events_unbound12:03:550
1637789997268,3cyclictest1712618-21kworker/u8:1+events_unbound11:15:550
1637789997268,3cyclictest1682429-21kworker/u8:3+events_unbound09:34:570
1637789997262,7cyclictest1213033-21systemd-journal08:10:000
1637792997163,6cyclictest1636208-21kworker/u8:2+flush-179:007:25:251
1637792997163,6cyclictest1636208-21kworker/u8:2+flush-179:007:25:251
1637789997167,3cyclictest1682429-21kworker/u8:3+events_unbound09:38:560
1637789997167,3cyclictest1636208-21kworker/u8:2+events_unbound07:27:570
1637789997167,3cyclictest1636208-21kworker/u8:2+events_unbound07:27:560
1637792997064,5cyclictest1728728-21kworker/u8:0+flush-179:012:05:011
1637792997064,4cyclictest1674778-21kworker/u8:1+flush-179:009:10:171
1637792997062,5cyclictest1665277-21kworker/u8:0+flush-179:008:40:251
1637792997060,5cyclictest1679914-21kworker/u8:0+events_unbound09:35:171
1637789997066,3cyclictest1715784-21kworker/u8:2+events_unbound11:20:430
1637789997066,3cyclictest1712618-21kworker/u8:1+events_unbound11:51:560
1637789997059,9cyclictest1675171-21apt-get09:05:120
1637789997059,8cyclictest1722355-21/usr/sbin/munin11:30:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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