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2026-05-25 - 18:20
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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 Mon May 25, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9927210911,69sleep19969-21/usr/sbin/munin06:56:091
10755991063,92cyclictest12279-21apt-get07:05:421
107609910347,11cyclictest181rcu_preempt10:11:182
107609910071,23cyclictest1-21systemd09:25:282
107609910071,23cyclictest1-21systemd09:25:282
1075599997,79cyclictest15412-21apt-get08:50:451
10755999820,60cyclictest5114-21kworker/u17:3+flush-179:009:26:041
10752999868,12cyclictest181rcu_preempt10:02:180
1075599973,51cyclictest16703-21apt-get07:15:411
10755999728,35cyclictest26403-21/usr/sbin/munin11:55:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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