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2026-04-25 - 02:21
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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 Fri Apr 24, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
228327599113100,10cyclictest2370778-21latency_hist11:40:011
22832719910893,11cyclictest1213033-21systemd-journal09:20:000
22832759910293,6cyclictest2329954-21latency_hist09:35:021
2283271999688,5cyclictest2284776-21latency_hist07:15:000
2283271999583,9cyclictest2389059-21apt-get12:33:000
2283271999280,9cyclictest2340006-21/usr/sbin/munin10:05:220
2283271999265,13cyclictest2346395-21latency_hist10:25:010
2283275998976,10cyclictest2341895-21diskstats10:10:141
2283275998879,7cyclictest2325177-21latency_hist09:20:011
2283275998877,8cyclictest2347980-21latency_hist10:30:021
2283275998877,8cyclictest2347980-21latency_hist10:30:011
2283271998569,14cyclictest2334735-21latency_hist09:50:000
2283271998374,6cyclictest2307723-21kworker/u8:2+flush-179:008:50:020
228327199831,65cyclictest1-21systemd11:50:160
2283275998057,20cyclictest1213033-21systemd-journal09:50:241
2283275997869,7cyclictest2362810-21latency_hist11:15:011
2283271997669,5cyclictest2329934-21kworker/u8:3+flush-179:009:40:230
2283271997668,6cyclictest2294940-21/usr/sbin/munin07:45:220
2283275997566,7cyclictest2289556-21latency_hist07:30:011
2283275997449,22cyclictest2380838-21latency_hist12:10:011
2283275997151,18cyclictest1213033-21systemd-journal11:50:161
2283275996962,5cyclictest2294701-21latency_hist07:45:001
2283271996965,3cyclictest2283203-21kworker/u8:0+flush-179:007:55:010
2283271996962,5cyclictest2382423-21latency_hist12:15:010
2283275996860,5cyclictest1213033-21systemd-journal12:25:231
2283271996860,6cyclictest2307723-21kworker/u8:2+flush-179:008:40:000
2283275996760,5cyclictest2370749-21kworker/u8:2+flush-179:012:15:011
2283271996760,5cyclictest2370767-21apt-get11:40:030
2283275996644,19cyclictest1213033-21systemd-journal08:56:241
2283275996559,4cyclictest2333181-21kworker/u8:2+flush-179:010:35:261
2283271996558,5cyclictest2310859-21latency_hist08:35:010
2283271996555,8cyclictest2336574-21latency_hist09:55:010
2283275996456,6cyclictest2344789-21latency_hist10:20:011
2283275996355,5cyclictest2353019-21latency_hist10:45:021
2283275996354,7cyclictest2385878-21latency_hist12:25:011
2283271996357,4cyclictest2307723-21kworker/u8:2+events_unbound08:55:220
2283271996355,6cyclictest2369177-21latency_hist11:35:010
2283271996355,5cyclictest1-21systemd11:28:230
2283271996353,8cyclictest2285317-21diskstats07:15:160
2283275996254,6cyclictest2359414-21kworker/u8:1+events_unbound11:10:011
2283271996254,6cyclictest2384048-21latency_hist12:20:010
2283275996151,8cyclictest2303163-21apt-get08:10:111
2283275996049,9cyclictest2319084-21apt-get09:00:101
2283271996054,4cyclictest2323822-21kworker/u8:0+events_unbound09:25:230
2283275995925,25cyclictest2367629-21systemd-run11:30:001
2283271995851,5cyclictest2369159-21kworker/u8:0+events_unbound11:45:240
2283271995750,5cyclictest2363477-21kworker/u8:3+events_unbound11:20:240
2283271995748,7cyclictest2323586-21latency_hist09:15:010
2283271995746,9cyclictest2350081-21apt-get10:35:120
2283275995651,4cyclictest2289533-21kworker/u8:1+flush-179:007:55:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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