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2026-08-24 - 09:34
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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 Mon Aug 24, 2026 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
186312205170,23sleep30-21swapper/319:09:063
186562202168,23sleep10-21swapper/119:09:251
184792201167,23sleep20-21swapper/219:07:092
185982199166,21sleep00-21swapper/019:08:400
867221540,5sleep11899399cyclictest21:00:011
1870128060,11sleep00-21swapper/019:10:010
128782620,2sleep30-21swapper/321:05:243
1899599593,19cyclictest0-21swapper/322:30:213
1899299583,11cyclictest4344-21cpuspeed_turbos19:45:130
1899299581,16cyclictest11291-21/usr/sbin/munin21:05:150
1899299563,18cyclictest0-21swapper/022:30:230
33702550,4sleep03373-21unixbench_multi21:50:300
1899299542,11cyclictest20475-21mailstats20:15:250
1899299534,10cyclictest30286-21awk23:50:220
1899599525,15cyclictest9128-21apt-get19:55:133
1899599525,15cyclictest8823-21runrttasks00:13:023
1899299522,12cyclictest11254-21sed21:05:010
1899299522,11cyclictest29272-21date22:45:020
1899299521,9cyclictest32524-21expr20:40:220
1899299521,11cyclictest15915-21awk22:15:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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