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2026-06-15 - 01:34
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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 20 highest latencies:
System rackcslot4.osadl.org (updated Sun Jun 14, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18386662319276,29sleep10-21swapper/107:07:081
18386622317275,28sleep00-21swapper/007:07:050
199841121420,4sleep10-21swapper/111:37:541
19993632630,3sleep00-21swapper/011:39:560
179699590,32rtkit-daemon26-21ksoftirqd/109:33:590
1839044995714,11cyclictest2025109-21latency_hist12:15:010
179699520,3rtkit-daemon1795-21rtkit-daemon10:18:501
183904999499,15cyclictest1910736-21apt-get09:40:131
183904999493,28cyclictest2025721-21ssh12:15:061
183904999493,28cyclictest2025721-21ssh12:15:061
1839049994811,13cyclictest1918197-21apt-get09:50:121
20426782470,2sleep00-21swapper/012:38:060
19215102470,4chrt1921486-21/usr/sbin/munin09:55:000
20350402460,3sleep10-21swapper/112:26:561
20194372430,1sleep00-21swapper/012:05:250
19327292430,7sleep01932725-21cron10:09:590
183904499433,9cyclictest1936267-21unin-run10:15:000
1839044994318,9cyclictest1952318-21hwlatdetect10:35:160
179699430,4rtkit-daemon1795-21rtkit-daemon08:49:371
179699430,4rtkit-daemon0-21swapper/012:20:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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