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2026-09-19 - 22:55
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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 rack3slot6.osadl.org (updated Sat Sep 19, 2026 12:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2796721140,6chrt27966-21cut11:15:191
1968921140,6chrt19687-21munin-plugin-st12:25:000
1968921140,6chrt19687-21munin-plugin-st12:25:000
3502998166,10cyclictest26-21ksoftirqd/112:20:121
3502998166,10cyclictest26-21ksoftirqd/112:20:121
349999796,59cyclictest0-21swapper/009:30:160
335927819,47sleep03373-21turbostat.cron07:10:000
174827730,34sleep10-21swapper/107:05:131
349999717,50cyclictest0-21swapper/007:55:240
75572700,8chrt0-21swapper/111:50:151
3502996943,14cyclictest0-21swapper/110:00:141
349999696,51cyclictest0-21swapper/010:20:130
3499996936,19cyclictest0-21swapper/012:15:120
3499996824,37cyclictest1121-21aten2.4-expect08:30:160
3499996815,10cyclictest171rcuc/011:10:010
3499996529,15cyclictest14-21ksoftirqd/009:45:050
136362650,5chrt36-21kcompactd010:35:111
3502996438,18cyclictest3493-21cyclictest10:30:221
3502996435,16cyclictest0-21swapper/111:05:151
3502996430,28cyclictest26-21ksoftirqd/111:25:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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