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2026-08-13 - 12:24
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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 Thu Aug 13, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
360035599101100,1cyclictest871ktimers/721:50:027
360035599960,1cyclictest0-21swapper/719:40:017
3600349998464,1cyclictest3650106-21/usr/sbin/munin20:40:181
3600350997574,0cyclictest0-21swapper/219:20:132
360035299715,63cyclictest0-21swapper/423:30:154
3600349997169,1cyclictest3772272-21ntpq00:20:201
3600348997069,0cyclictest0-21swapper/019:20:140
360034999677,59cyclictest3717452-21ntpq22:40:201
3600349996729,19cyclictest3703764-21ntp_states22:15:181
360034999668,39cyclictest0-21swapper/123:03:051
360034999666,59cyclictest3606157-21/usr/sbin/munin19:20:141
3600349996628,19cyclictest3283237-21kworker/u32:4+flush-8:019:55:261
3600349996626,39cyclictest101750irq/41-eno2-TxRx-223:22:271
3600349996324,38cyclictest870-21mta-sts-daemon20:20:171
3600349996324,38cyclictest101750irq/41-eno2-TxRx-220:59:591
3600349996323,39cyclictest0-21swapper/120:09:121
360034999630,61cyclictest3612649-21lpstat19:30:181
3600348996363,0cyclictest0-21swapper/021:50:020
3600349996123,19cyclictest3676948-21latency_hist21:30:021
3600349996022,38cyclictest101750irq/41-eno2-TxRx-222:03:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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