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2026-03-13 - 19:23
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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 rack8slot4.osadl.org (updated Fri Mar 13, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37762752239183,17sleep20-21swapper/207:09:042
37742012230166,52sleep60-21swapper/607:07:066
37741782224167,19sleep10-21swapper/107:06:461
37741072222168,43sleep70-21swapper/707:05:487
37742452220166,18sleep30-21swapper/307:07:453
37742572213159,17sleep50-21swapper/507:07:545
37762502212183,19sleep40-21swapper/407:08:424
37742152208181,17sleep00-21swapper/007:07:170
3776732993433,1cyclictest0-21swapper/311:05:023
377672099340,29cyclictest0-21swapper/111:15:011
377674499320,31cyclictest369-21systemd-journal08:00:026
377674499310,30cyclictest3827314-21apt-get08:43:006
3776739993128,2cyclictest3891831-21latency_hist10:40:015
377673999310,3cyclictest3796794-21turbostat.cron07:45:025
377673499310,30cyclictest0-21swapper/407:20:024
377673299310,3cyclictest3788426-21sh07:30:023
377673299310,30cyclictest3812942-21apt08:15:013
3776720993128,2cyclictest0-21swapper/111:30:011
3776751993028,1cyclictest16450irq/4-ttyS011:05:017
3776734993028,1cyclictest3876313-21taskset10:13:034
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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