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2026-07-21 - 23:37
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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 Jul 21, 2026 12:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2078737999558,18cyclictest871ktimers/710:26:517
2078737997517,39cyclictest2096564-21lpstat07:40:187
2078737997416,39cyclictest1-21systemd08:15:017
2078734997314,19cyclictest0-21swapper/409:35:154
2078737997234,19cyclictest101550irq/39-eno2-TxRx-009:30:127
2078737996911,39cyclictest2199663-21cat10:50:007
207873799657,40cyclictest2209008-21if_enxbe3af2b6011:05:177
2078737996426,19cyclictest30750irq/60-ahci[0000:00:07.0]12:00:057
207873799635,39cyclictest2256243-21sed12:30:217
2078737996224,19cyclictest30750irq/60-ahci[0000:00:07.0]07:14:147
2078737996124,18cyclictest871ktimers/711:36:037
2078737996022,38cyclictest0-21swapper/710:11:457
207873399600,1cyclictest0-21swapper/311:50:183
2078737995918,19cyclictest2150645-21munin-run09:20:017
2078737995619,18cyclictest2109254-21munin-run08:05:017
2078737995618,19cyclictest1086-21runrttasks08:16:327
2078737995517,19cyclictest2120842-21df08:25:147
2078737995517,0cyclictest2110719-21ntpq08:05:227
2078737995516,19cyclictest2223702-21ntp_states11:30:207
2078737995515,39cyclictest2136988-21apt-get08:55:127
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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