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2026-04-04 - 12:41
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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 Sat Apr 04, 2026 00:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
165502299791,59cyclictest236199-21snmpd22:03:540
1655022997517,39cyclictest1812561-21perl23:55:140
1655022997134,18cyclictest101650irq/40-eno2-TxRx-121:01:440
1655022997033,18cyclictest128-1kworker/0:1H+kblockd21:55:060
1655022996931,19cyclictest1086-21runrttasks19:11:500
165502499688,59cyclictest413-21systemd-journal20:25:152
165502499688,59cyclictest413-21systemd-journal20:25:152
165502299679,39cyclictest1775254-21kworker/0:1+ice22:50:420
165502299679,39cyclictest1705421-21fw_packets20:40:140
1655022996630,18cyclictest85650irq/35-eno1-TxRx-119:10:020
165502299656,39cyclictest1659636-21kworker/0:2+ice20:22:260
165502699646,19cyclictest0-21swapper/422:00:154
1655022996325,38cyclictest877-21mta-sts-daemon23:41:200
1655022996324,39cyclictest1793782-21ld23:20:180
165502299624,39cyclictest1733491-21mailstats21:30:220
165502299623,39cyclictest1780816-21kworker/0:0+ice23:15:140
165502299622,59cyclictest1803050-21perf23:40:000
165502299611,59cyclictest1698477-21kworker/0:1+ice20:37:220
165502299611,59cyclictest1698477-21kworker/0:1+ice20:37:220
165502299611,59cyclictest1659636-21kworker/0:2+ice20:10:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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