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2026-06-10 - 19:40
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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 Wed Jun 10, 2026 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
179365199121110,8cyclictest1853129-21latency_hist10:15:011
179365199116107,6cyclictest1867517-21kworker/u8:1+events_unbound11:20:001
17936519911290,17cyclictest1806452-21kworker/u8:3+flush-179:008:35:011
179364999111102,6cyclictest1815977-21latency_hist08:20:020
179364999111102,6cyclictest1815977-21latency_hist08:20:010
17936519910385,13cyclictest510-21rs:main1
1793649999888,7cyclictest1822341-21apt-get08:40:010
1793649999588,5cyclictest1825787-21latency_hist08:50:010
1793651999486,6cyclictest1827384-21apt-get08:55:031
1793649999484,7cyclictest1829200-21kworker/u8:0+flush-179:009:00:160
1793649999484,7cyclictest1829200-21kworker/u8:0+flush-179:009:00:150
1793649999385,5cyclictest1866394-21kworker/u8:0+events_unbound11:00:000
1793649999181,7cyclictest1885319-21kworker/u8:3+flush-179:012:00:210
1793651998982,5cyclictest1875919-21/usr/sbin/munin11:25:251
1793649998981,6cyclictest1872519-21kworker/u8:0+flush-179:011:50:210
1793649998677,7cyclictest1867517-21kworker/u8:1+flush-179:011:10:200
1793651998272,7cyclictest1213033-21systemd-journal12:05:011
1793651998267,11cyclictest1213033-21systemd-journal09:55:221
179364999811,77cyclictest1-21systemd12:30:010
1793649998075,4cyclictest1806452-21kworker/u8:3+flush-179:008:10:230
1793649998073,5cyclictest1849986-21kworker/u8:0+flush-179:010:20:000
1793649997973,5cyclictest1837243-21kworker/u8:3+flush-179:010:40:230
1793651997870,5cyclictest1885275-21latency_hist11:55:011
1793649997871,5cyclictest1837243-21kworker/u8:3+events_unbound10:05:150
1793649997870,6cyclictest1837243-21kworker/u8:3+flush-179:009:50:000
1793649997764,10cyclictest1891882-21kworker/u8:1+flush-179:012:30:220
1793649997662,9cyclictest1837243-21kworker/u8:3+events_unbound09:35:150
1793651997464,7cyclictest1872519-21kworker/u8:0+events_unbound11:50:001
1793649997465,7cyclictest1867517-21kworker/u8:1+flush-179:011:20:150
1793649997462,9cyclictest1880450-21apt-get11:38:350
1793649997462,9cyclictest1880450-21apt-get11:38:350
1793651997370,1cyclictest1798476-21kworker/u8:2+flush-179:007:40:011
1793649997367,4cyclictest1857936-21kworker/u8:2+flush-179:010:45:230
1793651997164,5cyclictest1837243-21kworker/u8:3+flush-179:009:30:131
1793649997160,8cyclictest1846746-21latency_hist09:55:020
1793649997158,10cyclictest1836156-21diskstats09:20:150
1793651996960,7cyclictest1848610-21apt-get10:00:121
1793649996964,3cyclictest1812832-21kworker/u8:2+flush-179:008:30:140
1793649996961,5cyclictest1827354-21kworker/u8:1+flush-179:009:15:150
1793651996749,13cyclictest1791900-21kworker/u8:0+events_unbound07:30:131
1793649996761,5cyclictest1893292-21kworker/u8:3+events_unbound12:35:240
1793649996758,7cyclictest1791900-21kworker/u8:0+flush-179:007:35:000
1793649996756,8cyclictest1834037-21kworker/u8:0+flush-179:009:55:210
1793649996754,10cyclictest1213033-21systemd-journal07:30:010
1793651996659,5cyclictest1-21systemd10:45:001
1793651996658,6cyclictest1834037-21kworker/u8:0+events_unbound09:45:001
1793651996657,7cyclictest1798476-21kworker/u8:2+flush-179:007:55:201
1793649996658,5cyclictest1878835-21kworker/u8:1+flush-179:011:40:240
1793649996657,6cyclictest1857936-21kworker/u8:2+events_unbound10:55:000
1793651996555,8cyclictest1872519-21kworker/u8:0+events_unbound12:10:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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