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2026-03-28 - 08:00
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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 rackdslot4.osadl.org (updated Sat Mar 28, 2026 00:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591225158,22phc2sys0-21swapper/319:09:123
243022202170,21sleep20-21swapper/219:07:592
242142202170,22sleep10-21swapper/119:06:511
243632199165,22sleep00-21swapper/019:08:460
1815921470,5sleep02494799cyclictest00:20:200
1815921470,5sleep02494799cyclictest00:20:200
237632700,2sleep32495099cyclictest20:10:233
138491690,1ptp4l391rcuc/322:05:423
41992620,2sleep00-21swapper/020:35:270
2495099616,15cyclictest32621-21cpuspeed_turbos19:25:133
2495099593,15cyclictest17733-21/usr/sbin/munin20:00:123
172142560,4sleep117215-21cpuspeed_turbos00:20:131
172142560,4sleep117215-21cpuspeed_turbos00:20:131
138491560,1ptp4l391rcuc/322:55:283
2495099554,11cyclictest22035-21date21:14:593
135191550,1getstats0-21swapper/322:48:543
2495099522,16cyclictest2555-21apt-get19:30:143
2495099504,9cyclictest20091-21cat23:20:183
2495099502,14cyclictest27452-21apt-get19:15:113
2495099501,11cyclictest0-21swapper/320:15:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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