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2025-12-27 - 16:33
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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 50 highest latencies:
System rack9slot2.osadl.org (updated Sat Dec 27, 2025 12:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
222362289210,72sleep20-21swapper/22
229882252176,43sleep10-21swapper/11
231442251157,25sleep30-21swapper/33
231862250183,36sleep00-21swapper/00
67482500,2sleep36741-21aten2_r9power_c3
241672450,3sleep10-21swapper/11
172872410,1sleep00-21swapper/00
219322400,1sleep30-21swapper/33
273672340,3sleep10-21swapper/11
225502340,2sleep00-21swapper/00
23464993111,18cyclictest35-21ksoftirqd/33
23464993111,18cyclictest35-21ksoftirqd/33
228552300,3sleep10-21swapper/11
2346499298,18cyclictest0-21swapper/33
2346499278,17cyclictest35-21ksoftirqd/33
2346499277,18cyclictest515-21avahi-daemon3
2346499276,18cyclictest520-21rs:main3
2346499270,4cyclictest35-21ksoftirqd/33
2346499265,19cyclictest28142-21apt.systemd.dai3
23464992614,3cyclictest35-21ksoftirqd/33
23464992613,11cyclictest35-21ksoftirqd/33
23464992612,12cyclictest35-21ksoftirqd/33
103362260,1sleep10-21swapper/11
2346499254,19cyclictest515-21avahi-daemon3
23464992521,2cyclictest341rcuc/33
23464992521,2cyclictest21150irq/39-mmc03
23464992518,3cyclictest35-21ksoftirqd/33
23464992516,3cyclictest35-21ksoftirqd/33
23464992515,3cyclictest35-21ksoftirqd/33
23464992513,3cyclictest35-21ksoftirqd/33
2346499245,16cyclictest0-21swapper/33
2346499243,18cyclictest2730-21sendmail-mta3
2346499243,18cyclictest15915-21sendmail-mta3
2346499242,5cyclictest0-21swapper/33
2346499242,4cyclictest18719-21munin-run3
2345599243,18cyclictest22397-21grep1
23455992416,5cyclictest6478-21run-parts1
292622230,8sleep335-21ksoftirqd/33
2346499234,4cyclictest35-21ksoftirqd/33
2346499234,17cyclictest18913-21latency_hist3
2346499233,18cyclictest20295-21sendmail-mta3
2346499233,17cyclictest10296-21sendmail-mta3
2346499232,3cyclictest340-21systemd-journal3
2346499231,4cyclictest517-21dbus-daemon3
23464992312,3cyclictest35-21ksoftirqd/33
23464992310,4cyclictest35-21ksoftirqd/33
2346499230,4cyclictest35-21ksoftirqd/33
23455992316,4cyclictest340-21systemd-journal1
321832220,2sleep10-21swapper/11
2346499225,10cyclictest111rcu_preempt3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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