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2025-06-19 - 02:22
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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 rackbslot7.osadl.org (updated Wed Jun 18, 2025 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12881211310,73sleep212960-21/usr/sbin/munin07:02:542
143269910479,16cyclictest23956-21ssh12:08:000
143269910479,16cyclictest23956-21ssh12:08:000
14334999572,13cyclictest0-21swapper/111:17:341
137272958,58sleep012851-21/usr/sbin/munin07:03:210
132182958,62sleep113222-21/usr/sbin/munin07:03:061
14326998968,13cyclictest202-21systemd-journal10:20:390
14326998752,7cyclictest181rcu_preempt10:25:040
14344998663,17cyclictest734-21netstat08:03:022
14344998663,17cyclictest734-21netstat08:03:022
14334998667,13cyclictest365-21systemd-logind10:52:331
14334998667,13cyclictest365-21systemd-logind10:52:331
14326998618,34cyclictest15-21ksoftirqd/008:18:460
14344998565,14cyclictest593-21sh09:28:002
14326998554,25cyclictest22112-21cat10:08:110
14326998444,33cyclictest14319-21cyclictest11:08:250
14344998360,16cyclictest796-21timerwakeupswit12:23:102
14344998353,21cyclictest23966-21ls12:08:002
14344998353,21cyclictest23966-21ls12:08:002
14334998363,11cyclictest0-21swapper/107:33:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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