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2026-05-14 - 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 Thu May 14, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3866953991410,139cyclictest0-21swapper/219:30:112
3866955998787,0cyclictest3999450-21cstates23:10:124
3866955998564,21cyclictest3915649-21ls20:35:244
3866955998564,21cyclictest3915649-21ls20:35:234
3866955998527,39cyclictest4005876-21ld23:20:204
386695599803,58cyclictest324-21ice-ptp-0000:f4:00.221:55:004
3866955998022,39cyclictest3911396-21aten2.4_rfpower20:30:114
3866955997638,19cyclictest3898577-21cat20:05:184
3866955997557,18cyclictest61-21ksoftirqd/422:46:054
3866955997436,18cyclictest6050ktimers/422:06:554
386695599679,39cyclictest3951881-21munin-run21:45:014
386695599645,40cyclictest3947251-21/usr/sbin/munin21:35:144
386695599644,20cyclictest0-21swapper/423:38:454
3866955996425,38cyclictest3882333-21processes19:35:214
3866955996423,19cyclictest0-21swapper/422:29:564
386695599635,39cyclictest4043408-21expr00:30:134
386695599624,39cyclictest3902818-21/usr/sbin/munin20:15:014
386695599612,20cyclictest3939102-21fschecks_count21:20:164
386695199611,59cyclictest0-21swapper/000:20:150
386695599602,39cyclictest3934533-21run-parts21:10:244
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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