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2026-06-12 - 05:28
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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 Jun 12, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3837991203,42cyclictest9531-21apt-get19:14:270
3837991203,42cyclictest9531-21apt-get19:14:270
3837991113,33cyclictest17854-21fschecks_time21:10:490
3837991113,26cyclictest3102-21ls23:29:180
38379911125,17cyclictest0-21swapper/023:14:180
3837991105,42cyclictest9739-21/usr/sbin/munin22:46:240
3837991103,37cyclictest3542-21unixbench_multi21:39:520
3837991102,29cyclictest23342-21grep19:54:520
3837991102,29cyclictest23342-21grep19:54:520
3837991093,31cyclictest4352-21unixbench_multi23:29:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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