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2025-10-19 - 19:37
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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 rackeslot2.osadl.org (updated Sun Oct 19, 2025 12:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
192353421080,1sleep016-21ksoftirqd/010:16:170
16663402970,2sleep0241rcuc/007:15:030
21464602860,2sleep30-21swapper/312:21:243
18570712830,1sleep10-21swapper/109:36:221
1659474992724,2cyclictest1635-21dbus-daemon12:20:010
165947499251,9cyclictest0-21swapper/010:31:120
2564091245,6phc2sys0-21swapper/310:31:123
1659474992320,2cyclictest260-21systemd-journal11:00:010
1659474992320,2cyclictest2158206-21grep12:30:020
1659474992320,2cyclictest1-21systemd12:15:010
1659474992314,5cyclictest1917774-21kthreadcore10:11:200
1659474992314,5cyclictest1826543-21cstates09:21:140
1659480992219,1cyclictest0-21swapper/207:35:002
1659479992219,2cyclictest1659468-21cyclictest09:20:001
1659479992215,3cyclictest1835898-21if_err_enp1s0.809:26:201
2564091211,6phc2sys0-21swapper/308:26:133
1659474992110,6cyclictest0-21swapper/009:26:140
2564091200,2phc2sys0-21swapper/307:11:183
1659480992017,1cyclictest0-21swapper/207:50:012
1659479992017,2cyclictest1692150-21apt-key07:35:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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