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2026-06-02 - 04:29
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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 rackfslot7.osadl.org (updated Tue Jun 02, 2026 00:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
137651997739,19cyclictest511ktimers/322:17:033
137651997718,39cyclictest137099-21kworker/u32:0+ext4-rsv-conversion19:35:013
137651997515,20cyclictest874-21mta-sts-daemon23:30:243
137651997333,19cyclictest312137-21if_err_eno100:25:173
137651997132,19cyclictest292895-21memory23:50:193
137651997112,19cyclictest0-21swapper/319:44:033
137651997012,39cyclictest236742-21taskset22:09:013
13765199667,58cyclictest239662-21munin-run22:15:013
137654996527,19cyclictest781ktimers/619:55:166
13765199635,39cyclictest247812-21cut22:30:013
13765199635,19cyclictest186203-21ntp_states20:35:213
137651996323,39cyclictest511ktimers/300:03:213
13765199623,40cyclictest161087-21ntpq19:50:213
137651995815,40cyclictest166149-21perl20:00:153
13765599570,18cyclictest0-21swapper/721:20:167
137651995718,38cyclictest194139-21memory20:50:173
137651995717,39cyclictest234221-21systemctl22:05:003
137651995636,19cyclictest219862-21sshd21:39:253
137651995618,19cyclictest268338-21meminfo23:05:193
137651995536,19cyclictest315346-21ntpq00:30:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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