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2025-05-03 - 01:27
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot6.osadl.org (updated Fri May 02, 2025 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
261612199140129,4cyclictest2695321-21kworker/u8:3+events_unbound11:20:191
261612199132124,5cyclictest2630674-21kworker/u8:2+events_unbound08:35:241
261611899125110,12cyclictest2695590-21apt-get11:15:120
261612199113106,5cyclictest2695321-21kworker/u8:3+events_unbound11:25:221
261612199113104,7cyclictest3105085-21systemd-journal11:20:011
26161219911298,11cyclictest2634136-21apt-get08:05:131
26161219911296,12cyclictest2649775-21apt-get08:55:001
26161189910776,19cyclictest2627465-21apt-get07:45:160
261612199105100,4cyclictest2645050-21kworker/u8:1+events_unbound09:10:141
26161189910290,9cyclictest2664613-21latency_hist09:40:010
26161189910075,23cyclictest2719689-21/usr/sbin/munin12:30:240
2616121999891,5cyclictest2629166-21gpgv07:50:011
2616121999888,7cyclictest2670677-21kworker/u8:0+flush-179:010:30:011
2616121999887,4cyclictest2630674-21kworker/u8:2+events_unbound08:10:301
2616118999886,9cyclictest2643409-21latency_hist08:35:010
2616121999590,4cyclictest2685271-21kworker/u8:2+events_unbound10:50:261
2616121999583,9cyclictest3105085-21systemd-journal12:05:001
2616118999585,7cyclictest2673079-21apt-get10:05:130
2616121999490,3cyclictest2667770-21kworker/u8:3+events_unbound09:50:231
2616121999488,4cyclictest2711482-21kworker/u8:0+events_unbound12:05:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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