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2026-05-19 - 09:29
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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 10 highest latencies:
System rackfslot7.osadl.org (updated Tue May 19, 2026 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1589945999414,79cyclictest1677440-21taskset21:49:564
158994599780,59cyclictest1728703-21ps23:20:234
158994599780,59cyclictest1728703-21ps23:20:224
1589948997739,19cyclictest871ktimers/719:45:167
1589945997214,39cyclictest236199-21snmpd00:39:154
1589945996910,40cyclictest1754168-21taskset00:09:224
158994199660,65cyclictest0-21swapper/000:00:270
158994599655,19cyclictest0-21swapper/400:20:004
158994599645,19cyclictest0-21swapper/423:50:134
158994599622,59cyclictest0-21swapper/422:19:454
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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