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2026-06-23 - 05:08
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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 Tue Jun 23, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
203804399127116,8cyclictest2071597-21latency_hist20:55:011
203804399127116,8cyclictest2071597-21latency_hist20:55:001
203804399120115,4cyclictest2092595-21kworker/u8:2+events_unbound23:05:001
203804399117113,3cyclictest2121429-21kworker/u8:2+flush-179:000:04:031
203804399115102,12cyclictest2092595-21kworker/u8:2+events_unbound22:40:221
203804399111105,5cyclictest2092595-21kworker/u8:2+flush-179:022:25:241
203804399111105,5cyclictest2092595-21kworker/u8:2+flush-179:022:25:231
203804299110100,8cyclictest2066566-21apt-get20:40:000
20380439910995,11cyclictest1213033-21systemd-journal22:25:011
203804399107102,4cyclictest2064967-21kworker/u8:0+events_unbound21:25:231
20380439910595,7cyclictest2041159-21kworker/u8:3+events_unbound19:30:241
20380429910598,4cyclictest2116672-21latency_hist23:15:010
20380439910499,3cyclictest2123023-21kworker/u8:0+flush-179:023:45:211
20380429910395,6cyclictest2041105-21latency_hist19:20:010
20380429910390,10cyclictest1213033-21systemd-journal00:25:000
20380429910191,7cyclictest2141375-21kworker/u8:2+flush-179:000:35:000
20380439910090,7cyclictest2057022-21latency_hist20:10:011
2038042999991,5cyclictest2089401-21kworker/u8:1+flush-179:022:15:230
2038043999892,5cyclictest2064967-21kworker/u8:0+events_unbound20:55:251
2038043999889,6cyclictest2090953-21latency_hist21:55:001
2038043999388,3cyclictest2108756-21kworker/u8:3+events_unbound22:55:151
2038043999285,4cyclictest2092595-21kworker/u8:2+flush-179:023:10:221
2038042999183,6cyclictest2050640-21kworker/u8:2+flush-179:019:50:230
2038042999183,5cyclictest2074838-21kworker/u8:3+flush-179:021:50:220
2038042999182,6cyclictest2071591-21kworker/u8:2+flush-179:020:55:220
2038042999180,7cyclictest2049053-21kworker/u8:1+flush-179:020:05:250
2038042999178,9cyclictest2129416-21apt-get23:55:000
2038043999085,4cyclictest2067442-21kworker/u8:3+events_unbound20:45:241
2038043999080,4cyclictest2084625-21kworker/u8:2+events_unbound21:40:231
2038042999084,4cyclictest2046925-21kworker/u8:0+events_unbound20:00:010
2038043998984,4cyclictest2121429-21kworker/u8:2+flush-179:023:30:231
2038043998973,14cyclictest2064967-21kworker/u8:0+flush-179:021:00:171
2038042998982,5cyclictest2050640-21kworker/u8:2+flush-179:020:30:000
2038042998977,8cyclictest2071591-21kworker/u8:2+flush-179:021:20:220
2038042998879,6cyclictest2084625-21kworker/u8:2+flush-179:021:44:590
2038042998874,10cyclictest2123023-21kworker/u8:0+flush-179:023:45:150
2038043998783,3cyclictest2050640-21kworker/u8:2+events_unbound20:35:201
2038042998769,12cyclictest1213033-21systemd-journal23:35:000
2038043998681,4cyclictest2092595-21kworker/u8:2+events_unbound22:10:241
2038043998673,10cyclictest2131321-21cupsd00:00:011
2038042998677,5cyclictest2103937-21kworker/u8:0+flush-179:022:45:220
2038042998676,7cyclictest2044291-21latency_hist19:30:010
2038043998580,4cyclictest2049053-21kworker/u8:1+flush-179:020:00:261
2038043998580,4cyclictest2049053-21kworker/u8:1+flush-179:020:00:261
2038042998576,6cyclictest1-21systemd19:50:000
2038042998571,10cyclictest510-21rs:main0
2038043998479,4cyclictest2074838-21kworker/u8:3+flush-179:022:00:271
2038043998478,4cyclictest2041159-21kworker/u8:3+flush-179:019:45:211
2038043998477,5cyclictest2068428-21latency_hist20:45:011
2038042998478,4cyclictest2103937-21kworker/u8:0+events_unbound22:40:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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