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2025-12-01 - 12:24
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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 Mon Dec 01, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2878202278211,51sleep00-21swapper/019:05:270
2884362258216,27sleep10-21swapper/119:05:401
4240542690,1chrt424056-21swap23:10:260
28895599612,15cyclictest458330-21apt-get00:00:131
125899600,4rtkit-daemon1257-21rtkit-daemon21:28:091
125899580,4rtkit-daemon1257-21rtkit-daemon21:42:081
3365892550,4sleep10-21swapper/121:05:261
2996722520,1chrt299671-21/usr/sbin/munin19:35:171
125899500,4rtkit-daemon1257-21rtkit-daemon21:53:330
125899500,3rtkit-daemon1257-21rtkit-daemon22:40:271
4291732420,1sleep10-21swapper/123:18:591
125899420,4rtkit-daemon1257-21rtkit-daemon20:17:270
125899400,3rtkit-daemon0-21swapper/023:06:130
3891422390,3sleep0388046-21/usr/sbin/munin22:20:230
125899390,3rtkit-daemon0-21swapper/122:48:591
125899390,3rtkit-daemon0-21swapper/022:25:020
125899380,6rtkit-daemon433501-21cstates23:25:151
125899380,3rtkit-daemon0-21swapper/023:52:040
125899380,3rtkit-daemon0-21swapper/019:24:020
125899370,6rtkit-daemon381126-21grep22:10:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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