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2026-04-18 - 12:33
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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
Characteristics of the 50 highest latencies:
System rackcslot4.osadl.org (updated Sat Apr 18, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14823842322279,29sleep00-21swapper/019:08:450
14823632266189,28sleep10-21swapper/119:08:321
15703202660,9sleep013-21ksoftirqd/022:04:360
179699550,4rtkit-daemon1795-21rtkit-daemon22:40:300
179699520,4rtkit-daemon1795-21rtkit-daemon23:28:141
16201392500,3sleep00-21swapper/023:15:180
148261999500,12cyclictest1531297-21apt-get21:10:261
148261999455,9cyclictest1-21systemd21:40:011
179699440,3rtkit-daemon1795-21rtkit-daemon23:39:390
148261999446,9cyclictest1509080-21cut20:15:001
148261999441,12cyclictest1609002-21date23:00:011
148261999441,12cyclictest1566977-21systemd-run22:00:001
179699420,2rtkit-daemon1795-21rtkit-daemon21:29:051
148261999422,11cyclictest1495317-21sh19:40:001
148261999422,10cyclictest1580992-21unin-run22:20:001
148261999413,11cyclictest1591587-21apt-get22:35:131
1482619994111,9cyclictest1599159-21if_enp2s022:45:161
148261999411,12cyclictest1503103-21latency_hist20:00:001
148261999403,10cyclictest1536120-21swap21:15:241
148261999400,13cyclictest1514091-21grep20:25:211
148261999395,12cyclictest1588241-21apt-get22:30:121
148261999392,24cyclictest1505077-1kworker/1:0H20:35:011
148261999392,10cyclictest1636449-21apt-get23:40:021
148261999390,11cyclictest1630961-21grep23:30:231
148261999386,10cyclictest1530547-21diskmemload23:05:231
148261999385,10cyclictest1622653-21ssh23:19:561
148261999383,13cyclictest1571916-21/usr/sbin/munin22:05:251
148261999383,11cyclictest1525845-21plymouth20:55:211
148261999383,10cyclictest1567422-21ssh22:00:121
148261999382,13cyclictest1577535-21date22:15:011
148261999382,13cyclictest1561404-21grep21:50:251
148261999382,13cyclictest1557291-21grep21:45:181
148261999382,10cyclictest1612420-21ls23:05:001
148261999381,10cyclictest1673660-21latency_hist00:35:011
179699370,3rtkit-daemon0-21swapper/122:20:140
148261999372,9cyclictest1661307-21mailstats00:15:251
148261999372,8cyclictest1650777-21latency_hist00:00:021
148261999372,12cyclictest1616229-21sh23:10:151
179699360,4rtkit-daemon1530547-21diskmemload23:35:301
179699360,3rtkit-daemon0-21swapper/119:11:051
179699360,3rtkit-daemon0-21swapper/100:12:411
179699360,3rtkit-daemon0-21swapper/000:31:080
148261999369,9cyclictest1656356-21sh00:06:551
148261999365,8cyclictest1553261-21apt-get21:40:121
148261999361,12cyclictest1506011-21ntpq20:05:201
148261999361,10cyclictest1499349-21date19:50:011
148261999360,10cyclictest1518764-21/usr/sbin/munin20:40:011
179699350,6rtkit-daemon1530547-21diskmemload21:30:370
179699350,5rtkit-daemon1524673-21munin-run20:55:011
179699350,4rtkit-daemon1795-21rtkit-daemon00:38:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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