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2026-04-24 - 08:07
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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 Apr 24, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
234759911847,44cyclictest18436-21ntp_kernel_err20:23:000
22471211411,71sleep022512-21awk18:58:070
23475991133,92cyclictest18802-21/usr/sbin/munin22:29:280
23475991133,79cyclictest21512-21latency_hist23:27:370
23475991123,59cyclictest0-21swapper/023:40:210
23475991113,66cyclictest0-21swapper/023:22:330
23475991103,68cyclictest19716-21df_inode00:17:530
234909910848,49cyclictest0-21swapper/122:58:101
234759910814,55cyclictest29323-21kernelversion21:53:140
234759910814,55cyclictest29323-21kernelversion21:53:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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