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2026-06-13 - 19:05
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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 Sat Jun 13, 2026 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151527699121115,4cyclictest1524832-21true07:40:000
151527699121111,7cyclictest1619164-21latency_hist12:30:000
151527799113104,6cyclictest1537784-21latency_hist08:20:021
15152769910497,5cyclictest1546243-21kworker/u8:0+flush-179:008:55:240
15152769910394,7cyclictest1519930-21latency_hist07:25:020
15152779910090,7cyclictest1213033-21systemd-journal10:50:001
15152769910093,5cyclictest1578595-21kworker/u8:1+flush-179:010:25:000
15152769910091,6cyclictest1596414-21kworker/u8:3+flush-179:011:30:200
1515277999890,6cyclictest1531178-21apt-get08:00:001
1515277999889,6cyclictest1534830-21/usr/sbin/munin08:10:231
1515277999888,7cyclictest1601398-21latency_hist11:35:011
1515277999888,7cyclictest1583377-21latency_hist10:40:021
1515277999887,8cyclictest1213033-21systemd-journal10:20:011
1515276999892,4cyclictest1529592-21kworker/u8:3+flush-179:008:00:000
1515276999890,6cyclictest1529592-21kworker/u8:3+flush-179:008:40:180
1515276999382,9cyclictest1555804-21apt-get09:14:590
1515277999283,7cyclictest1526639-21apt-get07:45:121
1515276999284,6cyclictest1572216-21kworker/u8:0+flush-179:010:10:210
1515276999084,4cyclictest1508865-21kworker/u8:3+flush-179:007:10:240
1515276999080,8cyclictest1544420-21latency_hist08:40:020
1515276999080,8cyclictest1544420-21latency_hist08:40:010
1515276998980,6cyclictest1603341-21kworker/u8:1+flush-179:011:45:170
1515276998978,8cyclictest1213033-21systemd-journal10:00:010
1515277998878,8cyclictest1515177-21kworker/u8:0+flush-179:007:15:001
1515277998878,7cyclictest1607995-21kworker/u8:2+flush-179:012:09:591
1515277998677,7cyclictest1596414-21kworker/u8:3+flush-179:011:25:261
1515277998674,9cyclictest1556719-21kworker/u8:0+flush-179:009:20:011
1515276998676,7cyclictest1539410-21kworker/u8:2+flush-179:008:30:210
1515276998578,5cyclictest1572216-21kworker/u8:0+flush-179:010:05:220
1515276998475,6cyclictest1556719-21kworker/u8:0+flush-179:009:20:220
1515276998378,4cyclictest1567498-21kworker/u8:3+flush-179:010:25:240
1515277998276,4cyclictest1547832-21kworker/u8:1+events_unbound09:05:011
1515277998276,4cyclictest1519974-21kworker/u8:2+flush-179:007:40:231
1515276998276,4cyclictest1562407-21kworker/u8:2+flush-179:009:45:220
1515277998159,19cyclictest1564834-21diskstats09:40:151
1515276998173,6cyclictest1581783-21latency_hist10:35:010
1515276998073,5cyclictest1588127-21kworker/u8:3+flush-179:011:00:010
1515276998073,5cyclictest1565877-21latency_hist09:45:010
1515276998071,6cyclictest1607995-21kworker/u8:2+flush-179:012:05:220
4577091790,18ptp4l61490irq/134-eno1-TxRx-007:05:513
4577091790,18ptp4l61490irq/134-eno1-TxRx-007:05:513
1515277997970,7cyclictest1544423-21apt-get08:40:041
1515277997968,7cyclictest1529592-21kworker/u8:3+flush-179:008:30:001
1515277997869,6cyclictest1559236-21kworker/u8:3+flush-179:009:30:221
1515277997865,10cyclictest1542551-21apt-get08:35:011
1515277997768,7cyclictest1614638-21apt-get12:15:121
1515276997769,6cyclictest1603341-21kworker/u8:1+flush-179:011:55:160
1515276997768,7cyclictest1213033-21systemd-journal07:54:590
1515276997768,6cyclictest1607995-21kworker/u8:2+flush-179:012:00:160
1515276997765,10cyclictest1213033-21systemd-journal08:20:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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