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2026-09-02 - 09:49
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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 Wed Sep 02, 2026 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
368965999435,58cyclictest871ktimers/723:04:537
368965997638,38cyclictest85550irq/34-eno1-TxRx-000:10:017
368965997638,38cyclictest368957-21cyclictest19:54:467
368965997638,38cyclictest0-21swapper/719:40:077
368965997617,40cyclictest416916-21ntpq20:35:207
368965997538,18cyclictest871ktimers/722:36:207
368965997537,19cyclictest101550irq/39-eno2-TxRx-019:20:037
368965997437,18cyclictest101550irq/39-eno2-TxRx-021:39:317
368965997335,19cyclictest101550irq/39-eno2-TxRx-000:19:437
368965997233,39cyclictest0-21swapper/723:44:157
368965997233,19cyclictest0-21swapper/720:51:357
368965997232,39cyclictest101550irq/39-eno2-TxRx-019:39:077
368965997232,39cyclictest101550irq/39-eno2-TxRx-000:27:437
368965997132,39cyclictest101550irq/39-eno2-TxRx-022:58:227
368965997032,19cyclictest0-21swapper/722:47:467
368965996829,38cyclictest465976-21/usr/sbin/munin22:05:177
368965996729,38cyclictest0-21swapper/720:15:177
368958996528,19cyclictest171ktimers/023:00:150
368965996425,39cyclictest0-21swapper/720:30:497
36896599635,39cyclictest381436-21ntp_kernel_pll_19:30:217
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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