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2025-11-19 - 14:41
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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 Wed Nov 19, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38321152278235,28sleep00-21swapper/019:07:110
38319922256184,27sleep10-21swapper/119:05:531
125899620,4rtkit-daemon1257-21rtkit-daemon22:26:320
39906942610,4sleep03990677-21apt-get23:40:160
383254299592,5cyclictest4025441-40apt-check00:30:211
383254299562,13cyclictest4008251-21apt-get00:05:151
125899520,4rtkit-daemon1257-21rtkit-daemon21:36:150
125899500,4rtkit-daemon0-21swapper/120:20:051
40191642490,4sleep10-21swapper/100:20:271
39410442470,3sleep1251rcuc/122:30:021
38387082470,1chrt3838707-21/usr/sbin/munin19:20:271
3832542994712,6cyclictest3903964-21apt-get21:40:141
383254299464,9cyclictest3896191-21apt-get21:30:181
125899460,6rtkit-daemon1257-21rtkit-daemon23:00:160
383254299452,8cyclictest3925964-21apt-get22:10:161
383254299452,10cyclictest3859152-21apt-get20:15:181
383254299433,9cyclictest3987231-21apt-get23:35:171
383254299433,10cyclictest4011227-21apt-get00:10:171
125899420,4rtkit-daemon3845470-21apt-get19:40:141
383254299413,10cyclictest3976639-21apt-get23:20:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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