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2025-11-12 - 09:24
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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
Characteristics of the 20 highest latencies:
System rackdslot3.osadl.org (updated Wed Nov 12, 2025 00:45:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
259242229202,18sleep30-21swapper/319:08:583
257642206167,27sleep00-21swapper/019:07:030
257352203170,22sleep20-21swapper/219:06:412
256502202169,22sleep10-21swapper/119:05:351
2653921420,5sleep32642099cyclictest22:30:193
2641499618,12cyclictest30532-21irqrtprio23:45:200
2641499608,11cyclictest11509-21mailstats23:05:240
2641499608,10cyclictest14758-21tune2fs00:20:180
2641499598,10cyclictest18100-21mailstats00:25:260
2641499597,12cyclictest25674-21grep20:15:140
2641499588,10cyclictest25557-21sendmail_mailqu21:20:250
2641499587,16cyclictest32579-21cat20:30:000
2641499584,16cyclictest0-21swapper/022:05:070
2641499579,11cyclictest6697-21cat20:40:330
2641499578,17cyclictest2257-21gnome-shell20:35:280
2641499577,10cyclictest15961-21cat23:15:220
136991570,1ptp4l401ktimersoftd/321:15:423
136991570,1ptp4l401ktimersoftd/319:37:283
2641499567,9cyclictest11256-21basename20:50:290
2641499567,16cyclictest3910-21/usr/sbin/munin19:30:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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