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2025-12-05 - 01:24
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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 Thu Dec 04, 2025 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18418319910377,23cyclictest1934223-21/usr/sbin/munin11:55:230
1841831999180,8cyclictest1848384-21latency_hist07:30:010
1841831998879,7cyclictest1922776-21dpkg11:17:470
1841831998777,8cyclictest1911784-21/usr/sbin/munin10:45:230
1841831998269,9cyclictest1943802-21latency_hist12:25:010
1841833998068,9cyclictest271-21systemd-journal07:50:001
1841833997868,8cyclictest1948828-21apt-get12:40:001
1841833997754,20cyclictest271-21systemd-journal09:40:001
1841833997667,6cyclictest1846799-21latency_hist07:25:011
1841831997465,7cyclictest1907020-21apt-get10:30:110
1841831997361,9cyclictest1867511-21latency_hist08:30:010
1841833997260,10cyclictest1885565-21apt-get09:25:011
1841833997165,4cyclictest1841782-21kworker/u8:3+flush-179:008:20:011
1841840997040,1cyclictest0-21swapper/307:17:593
1841833997063,5cyclictest1917924-21kworker/u8:2+flush-179:011:17:371
1841833996856,10cyclictest1908377-21awk10:35:011
1841831996855,10cyclictest271-21systemd-journal10:10:250
1841831996758,7cyclictest1885552-21latency_hist09:25:000
1841831996658,5cyclictest1931804-21kworker/u8:2+flush-179:012:05:010
1841831996657,7cyclictest1864595-21apt-get08:20:130
1841831996655,8cyclictest1877832-21/usr/sbin/munin09:00:230
1841833996454,8cyclictest1895608-21apt-get09:55:131
1841833996357,4cyclictest1935830-21kworker/u8:1+events_unbound12:20:241
1841831996356,4cyclictest1894249-21kworker/u8:2+events_unbound09:55:140
184183199631,60cyclictest1-21systemd08:05:010
1841831996153,6cyclictest1868849-21kworker/u8:0+events_unbound09:00:010
1841837996058,1cyclictest0-21swapper/208:39:592
1841831996053,5cyclictest1891903-21kworker/u8:1+flush-179:009:45:010
1841831996053,5cyclictest1891903-21kworker/u8:1+flush-179:009:45:000
1841833995949,7cyclictest1849971-21latency_hist07:35:011
1841831995948,9cyclictest1947489-21apt-get12:35:130
1841831995948,8cyclictest1864328-21latency_hist08:20:010
1841833995851,5cyclictest1894249-21kworker/u8:2+events_unbound10:05:251
1841833995849,7cyclictest1895352-21latency_hist09:55:011
1841833995848,7cyclictest1857957-21latency_hist08:00:021
1841831995854,3cyclictest1891903-21kworker/u8:1+flush-179:010:25:260
1841833995755,1cyclictest0-21swapper/110:27:591
1841833995746,10cyclictest1841782-21kworker/u8:3+flush-179:008:20:161
1841837995653,2cyclictest0-21swapper/210:02:582
1841831995648,6cyclictest1859579-21kworker/u8:0+events_unbound08:10:000
1841831995648,6cyclictest1843342-21latency_hist07:15:020
1841833995548,5cyclictest1879419-21kworker/u8:1+flush-179:009:25:181
1841831995550,4cyclictest1935830-21kworker/u8:1+flush-179:012:10:260
1841831995546,7cyclictest271-21systemd-journal11:05:000
1841831995538,15cyclictest1929237-21perf11:40:000
1841831995533,20cyclictest1932525-21latency_hist11:50:000
1841831995533,20cyclictest1932525-21latency_hist11:49:590
1841833995447,6cyclictest1924486-21kworker/u8:0+flush-179:012:00:001
1841833995447,5cyclictest1931051-21/usr/sbin/munin11:45:241
1841833995447,5cyclictest1931051-21/usr/sbin/munin11:45:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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