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2025-07-07 - 05:22
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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 Jul 07, 2025 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17270459910063,2cyclictest0-21swapper/121:17:481
1727045998383,0cyclictest1899869-21latency_hist00:15:001
1727045997618,38cyclictest1891480-21systemd-run00:00:011
1727045997618,19cyclictest1792086-21munin-run21:05:011
1727045997515,58cyclictest1762044-21expr20:10:151
1727045997415,39cyclictest1879733-21sed23:35:231
1727045997313,58cyclictest1787250-21cstates20:55:151
1727045997233,39cyclictest321rcuc/119:50:231
1727045997133,38cyclictest0-21swapper/121:36:171
1727045997133,38cyclictest0-21swapper/100:26:111
1727045997112,59cyclictest1818033-21kworker/u32:4+events_unbound22:37:381
1727045997012,39cyclictest1822269-21kworker/u32:0+events_unbound22:04:021
1727045996930,39cyclictest1818033-21kworker/u32:4+flush-8:021:52:251
1727045996911,39cyclictest1772859-21kworker/u32:1+events_unbound20:35:491
1727045996831,18cyclictest1911462-21/usr/sbin/munin00:35:271
1727045996830,38cyclictest34-21ksoftirqd/120:16:391
1727045996829,39cyclictest0-21swapper/100:03:121
1727045996728,39cyclictest0-21swapper/121:06:091
1727045996547,18cyclictest0-21swapper/122:08:351
1727045996224,19cyclictest1749792-21cat19:50:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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