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2026-04-20 - 06:48
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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 Mon Apr 20, 2026 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18838998123,39cyclictest129145-21perf22:34:504
18838997638,19cyclictest236199-21snmpd23:02:324
18838997436,19cyclictest413-21systemd-journal00:05:024
18838997416,39cyclictest142586-21sshd22:51:544
18838997314,39cyclictest50209-21df20:05:144
18838997214,19cyclictest72250-21cat20:45:174
18838997133,38cyclictest601ktimers/422:56:234
18838997133,38cyclictest0-21swapper/421:01:064
18838996931,38cyclictest0-21swapper/423:24:114
18838996931,38cyclictest0-21swapper/423:24:104
1883899668,39cyclictest193160-21sed00:25:024
18838996628,19cyclictest155086-21/usr/sbin/munin23:15:164
18838996427,18cyclictest601ktimers/421:50:124
1883899635,19cyclictest134603-21munin-run22:40:004
1883999624,19cyclictest0-21swapper/523:05:165
18838996222,39cyclictest0-21swapper/420:14:564
18838996122,39cyclictest0-21swapper/400:35:574
18838995922,18cyclictest42671-21gzip19:50:224
18841995858,0cyclictest0-21swapper/700:25:197
18838995839,19cyclictest601ktimers/420:24:384
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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