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2025-11-12 - 01:18
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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 rackbslot1.osadl.org (updated Tue Nov 11, 2025 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10154092219191,18sleep10-21swapper/107:09:421
10153402202174,18sleep30-21swapper/307:08:483
10151272201179,13sleep00-21swapper/007:06:080
10153292199176,13sleep20-21swapper/207:08:392
129187521450,1sleep11291874-21ntpq11:35:121
1015647998583,1cyclictest1114809-13chrome08:45:071
1015647997156,3cyclictest1053113-21ThreadPoolForeg07:45:011
1015650997064,4cyclictest1176651-21latency_hist09:45:012
101564799684,63cyclictest1026285-21kworker/u8:4+efi_rts_wq07:17:001
1015643996561,3cyclictest1315885-21kworker/u8:2+flush-179:012:05:190
1015647996156,4cyclictest1269728-21/usr/share/muni11:15:011
1015643996157,3cyclictest1192449-21/usr/share/muni10:00:100
101565099583,54cyclictest1020336-21kworker/u8:3+efi_rts_wq07:16:582
1015647995754,2cyclictest1036650-21kworker/u8:0+events_unbound08:00:071
1015647995451,2cyclictest1290121-21kworker/u8:5+events_unbound11:45:351
1015647995450,2cyclictest1238574-21snmp_wanpowerct10:45:011
1015647995448,4cyclictest1176952-21chrome09:45:011
1015647995448,4cyclictest1176952-21chrome09:45:011
1015650995337,14cyclictest1053049-21chrome07:45:012
1015647995349,3cyclictest1135401-21kworker/u8:2+events_unbound09:10:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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