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2026-01-02 - 01:48
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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 Thu Jan 01, 2026 12:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
109055999113109,1cyclictest191rcu_preempt08:56:335
10905599910022,59cyclictest1101882-21apt-config07:30:015
1090559999416,59cyclictest1189350-21vmstat10:00:265
1090559998224,39cyclictest1225449-21sort11:05:185
1090559997635,19cyclictest1105331-21taskset07:35:135
1090559997214,39cyclictest1272864-21if_eno612:30:165
1090559997133,38cyclictest0-21swapper/510:20:265
1090559997113,39cyclictest1133342-21systemd-run08:25:005
109055999679,39cyclictest1158762-21apt09:10:105
109055999666,60cyclictest1126081-21ntpq08:10:185
109055999657,39cyclictest1277708-21cat12:40:015
109055999635,39cyclictest1154543-21/usr/sbin/munin09:00:225
1090559996122,39cyclictest1259040-21grep12:05:185
1090559996022,19cyclictest1236847-21ntpq11:25:215
1090559995921,19cyclictest1266525-21aten2.4_rfpower12:20:125
1090561995856,1cyclictest0-21swapper/709:25:117
1090559995839,19cyclictest691ktimers/509:40:005
1090559995839,19cyclictest691ktimers/508:50:045
1090559995820,38cyclictest0-21swapper/512:00:475
1090559995718,39cyclictest691ktimers/509:24:125
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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