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2025-12-28 - 05:53
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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 Dec 28, 2025 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24788962254180,58sleep00-21swapper/019:08:190
24790062253214,26sleep10-21swapper/119:09:321
179699560,6rtkit-daemon1795-21rtkit-daemon23:29:091
2479136995512,12cyclictest2670266-21unin-run00:15:000
2479136995411,11cyclictest2612438-21latency_hist23:00:000
2479136995316,13cyclictest2628311-40apt-check23:20:160
2479136995311,8cyclictest2658828-21munin-run23:59:590
179699530,1rtkit-daemon1795-21rtkit-daemon21:46:291
2479136995213,9cyclictest1-21systemd21:50:000
2479136995213,21cyclictest2632347-21apt-get23:25:150
26581492510,6sleep10-21swapper/123:58:331
2479136995111,12cyclictest2604862-21sh22:49:590
2479136995110,11cyclictest2674040-21/usr/sbin/munin00:20:010
26439272500,4sleep12643916-21sort23:40:151
2479136995010,11cyclictest2641056-21grep23:35:230
179699500,4rtkit-daemon1795-21rtkit-daemon22:07:080
2479136994913,9cyclictest2527130-21munin-run21:10:000
2479136994913,9cyclictest2527130-21munin-run21:10:000
2479136994912,9cyclictest2527122-21diskmemload23:40:230
2479136994910,11cyclictest2586261-21apt-get22:25:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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