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2025-09-19 - 04:48
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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 Fri Sep 19, 2025 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25276872321282,25sleep00-21swapper/019:09:420
25275772311276,20sleep10-21swapper/119:08:311
26336972620,4sleep00-21swapper/022:34:060
2527829995513,23cyclictest2592738-40apt-check21:35:160
125899540,4rtkit-daemon1257-21rtkit-daemon00:17:051
26479302530,4sleep02647926-21ssh22:55:150
125899530,4rtkit-daemon1257-21rtkit-daemon21:27:160
125899530,4rtkit-daemon1257-21rtkit-daemon21:10:180
125899520,4rtkit-daemon1257-21rtkit-daemon20:38:150
125899500,4rtkit-daemon1257-21rtkit-daemon20:55:050
125899500,3rtkit-daemon1257-21rtkit-daemon19:44:060
25455652490,2sleep1251rcuc/119:50:231
2527829994910,13cyclictest2675498-21ssh23:35:010
125899490,4rtkit-daemon1257-21rtkit-daemon23:17:510
252782999489,11cyclictest2603488-21apt-get21:50:150
125899470,4rtkit-daemon1257-21rtkit-daemon00:07:120
252782999468,10cyclictest2540235-21sed19:40:010
2527829994612,11cyclictest2654043-21ssh23:03:590
125899460,4rtkit-daemon1257-21rtkit-daemon21:42:460
2527829994511,22cyclictest2670408-21ssh23:25:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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