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2026-04-07 - 13:11
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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 Apr 07, 2026 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1060865998123,58cyclictest1229704-21/usr/sbin/munin00:15:136
1060865997315,39cyclictest1078910-21sed19:40:206
1060865997233,39cyclictest0-21swapper/623:28:206
1060865997233,19cyclictest1060858-21cyclictest19:27:046
1060865997233,19cyclictest1060858-21cyclictest19:27:036
1060865997233,19cyclictest0-21swapper/621:11:446
1060865997132,39cyclictest7850ktimers/622:23:286
1060865997132,39cyclictest0-21swapper/623:32:406
1060865997111,59cyclictest1177573-21kworker/u32:4+events_unbound23:42:026
1060865997031,19cyclictest0-21swapper/622:56:226
1060865997031,19cyclictest0-21swapper/622:27:406
1060865997010,59cyclictest1127433-21kworker/u32:1+events_unbound21:15:046
1060865996911,39cyclictest744688-21kworker/u32:0+events_unbound19:34:166
1060863996910,39cyclictest1097690-21taskset20:15:154
1060865996829,39cyclictest0-21swapper/621:29:386
1060865996829,19cyclictest0-21swapper/620:09:286
1060865996811,38cyclictest1138602-21kworker/u32:2+events_unbound22:51:406
106086599679,39cyclictest1177573-21kworker/u32:4+events_unbound22:43:136
1060865996728,19cyclictest0-21swapper/622:08:206
106086599656,39cyclictest236199-21snmpd00:32:066
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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