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2026-03-18 - 03:35
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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 Wed Mar 18, 2026 00:45:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
272539910713,79cyclictest0-21swapper/023:45:140
272539910613,82cyclictest0-21swapper/021:30:110
272539910511,78cyclictest0-21swapper/022:35:120
272539910113,77cyclictest0-21swapper/021:00:130
27253999823,20cyclictest250-21systemd-journal22:21:470
27253999536,13cyclictest22603-21apt-get20:25:240
27253999419,21cyclictest250-21systemd-journal22:41:490
2726099939,61cyclictest0-21swapper/122:20:101
27260999110,56cyclictest0-21swapper/119:40:121
2725399907,41cyclictest17064-21apt-get20:10:140
2725399884,43cyclictest250-21systemd-journal00:38:330
27260998610,51cyclictest0-21swapper/119:30:101
2726099858,53cyclictest0-21swapper/122:15:111
27260998510,20cyclictest0-21swapper/119:55:121
27260998510,20cyclictest0-21swapper/119:55:111
2725399855,39cyclictest7881-21diskstats00:15:210
27260998414,48cyclictest0-21swapper/122:30:131
27253998423,24cyclictest448-21dbus-daemon22:00:010
27260998335,28cyclictest0-21swapper/121:35:141
2726099829,49cyclictest0-21swapper/122:05:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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