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2026-09-01 - 03:23
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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 Aug 31, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
173785899143132,8cyclictest1820958-21latency_hist11:25:001
173785899139133,4cyclictest1739471-21kworker/u8:2+flush-179:007:40:151
173785899139128,8cyclictest1742627-21latency_hist07:25:001
173785899138130,5cyclictest1757789-21kworker/u8:1+events_unbound08:20:021
173785499134123,8cyclictest1787266-21latency_hist09:40:010
173785899133122,8cyclictest1782228-21latency_hist09:25:011
173785499130114,13cyclictest1795237-21apt-get10:05:000
173785899129120,7cyclictest1800253-21latency_hist10:20:011
173785899123115,6cyclictest1761186-21kworker/u8:0+events_unbound08:50:241
173785899121112,7cyclictest1765955-21kworker/u8:3+flush-179:008:50:001
173785899119112,4cyclictest1779410-21kworker/u8:0+events_unbound10:00:231
173785899118108,8cyclictest1213033-21systemd-journal11:10:011
173785899117110,5cyclictest1824116-21kworker/u8:0+flush-179:011:35:151
173785899114108,4cyclictest1787310-21kworker/u8:1+flush-179:009:55:011
173785899113101,10cyclictest1805259-21kworker/u8:0+events_unbound10:50:251
173785899112102,8cyclictest1829445-21kworker/u8:1+flush-179:012:00:001
173785899111105,5cyclictest1731552-21kworker/u8:1+flush-179:007:30:161
173785899111102,7cyclictest1812356-21kworker/u8:3+flush-179:011:00:001
173785899111101,7cyclictest1787310-21kworker/u8:1+flush-179:010:15:001
173785899108102,4cyclictest1751925-21kworker/u8:3+flush-179:008:10:141
17378549910897,8cyclictest1777434-21latency_hist09:10:000
173785899107101,4cyclictest1754023-21kworker/u8:0+events_unbound08:00:241
17378589910699,5cyclictest1765955-21kworker/u8:3+flush-179:009:00:001
17378589910699,5cyclictest1757789-21kworker/u8:1+flush-179:008:30:251
17378589910593,9cyclictest1790434-21latency_hist09:50:011
17378589910494,7cyclictest1213033-21systemd-journal09:00:151
17378549910497,5cyclictest1817222-21kworker/u8:1+flush-179:011:15:270
17378589910394,6cyclictest1829445-21kworker/u8:1+flush-179:012:25:151
17378589910294,5cyclictest1829445-21kworker/u8:1+flush-179:012:30:161
17378589910293,7cyclictest1829445-21kworker/u8:1+flush-179:012:10:201
17378549910295,4cyclictest1751925-21kworker/u8:3+flush-179:008:05:000
17378589910190,9cyclictest1765955-21kworker/u8:3+flush-179:008:45:001
17378549910188,9cyclictest1751925-21kworker/u8:3+flush-179:008:05:210
17378589910094,5cyclictest1775843-21kworker/u8:1+flush-179:009:10:251
17378589910094,4cyclictest1751925-21kworker/u8:3+events_unbound07:55:021
17378589910092,6cyclictest1739471-21kworker/u8:2+flush-179:007:45:141
17378589910090,6cyclictest1779410-21kworker/u8:0+flush-179:010:20:161
17378549910076,13cyclictest1810059-21apt-get10:50:120
1737858999992,6cyclictest1779410-21kworker/u8:0+events_unbound09:25:221
1737858999992,5cyclictest1817222-21kworker/u8:1+flush-179:011:30:261
1737858999992,5cyclictest1779410-21kworker/u8:0+events_unbound09:40:241
1737854999683,11cyclictest1785424-21http09:35:000
1737858999588,6cyclictest1734761-21kworker/u8:3+flush-179:007:20:011
1737858999588,5cyclictest1814624-21kworker/u8:2+flush-179:011:15:001
1737858999588,4cyclictest1806677-21kworker/u8:2+events_unbound10:40:241
1737858999583,10cyclictest1764123-21latency_hist08:30:001
1737858999387,4cyclictest1757789-21kworker/u8:1+events_unbound08:20:151
1737858999386,5cyclictest1821194-21kworker/u8:3+flush-179:011:25:221
1737858999384,6cyclictest1829445-21kworker/u8:1+events_unbound12:20:221
1737854999383,7cyclictest1828915-21latency_hist11:50:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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