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2025-11-02 - 18:48
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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
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rackeslot6.osadl.org (updated Sun Nov 02, 2025 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1388821999186,4cyclictest1484203-21kworker/u8:3+events_unbound12:40:001
1388819998351,21cyclictest1435919-21latency_hist09:35:010
1388821997766,8cyclictest1427450-21latency_hist09:10:011
1388819997667,7cyclictest1494213-21/usr/sbin/munin12:35:240
1388821997567,5cyclictest1417671-21kworker/u8:0+events_unbound08:50:011
1388819997569,4cyclictest1474366-21apt-get11:35:030
1388821997366,5cyclictest1414912-21kworker/u8:2+flush-179:008:40:001
1388821997062,6cyclictest1467996-21latency_hist11:15:011
138882199690,3cyclictest721-21Xorg07:11:001
1388819996960,7cyclictest1422417-21latency_hist08:55:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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