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2026-08-07 - 13:08
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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 10 highest latencies:
System rackbslot7.osadl.org (updated Fri Aug 07, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1173121076,16sleep10-21swapper/118:52:541
11272210530,40sleep00-21swapper/018:51:100
121609910344,39cyclictest29581-21fschecks_time19:45:520
121609910344,39cyclictest29581-21fschecks_time19:45:520
121609910333,29cyclictest0-21swapper/023:20:280
121609910333,29cyclictest0-21swapper/023:20:280
121609910237,34cyclictest4743-21ssh21:24:510
121609910236,33cyclictest2615-21ssh00:01:060
121609910135,39cyclictest11628-21taskset22:30:080
121729910059,34cyclictest4183-21sendmail00:05:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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