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2026-08-24 - 18:56
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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 rackfslot7.osadl.org (updated Mon Aug 24, 2026 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
149056099102102,0cyclictest0-21swapper/108:45:171
149055999991,0cyclictest0-21swapper/011:10:160
1490560998245,37cyclictest101750irq/41-eno2-TxRx-209:20:211
1490560997537,19cyclictest1548298-21systemd-run08:55:011
1490560997532,39cyclictest1520280-21sshd08:02:091
1490563996929,39cyclictest0-21swapper/408:10:174
149056099668,39cyclictest331ktimers/108:32:261
149056099668,39cyclictest331ktimers/108:32:251
149056099613,39cyclictest1621293-21ntpq11:05:211
149056099590,58cyclictest1495962-21systemd-run07:20:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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