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2026-06-23 - 16:24
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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 Tue Jun 23, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27597216110,110sleep127668-21fschecks_time18:53:581
275762968,59sleep227582-21diskstats18:53:552
2890099922,32cyclictest13997-21apt-get23:58:530
28900999166,8cyclictest181rcu_preempt00:18:570
28900999138,30cyclictest22682-21munin-run23:18:300
28900998957,12cyclictest181rcu_preempt21:39:520
28900998947,11cyclictest181rcu_preempt22:44:370
28900998947,11cyclictest181rcu_preempt22:44:370
2890099878,46cyclictest15-21ksoftirqd/020:26:270
59472860,5sleep20-21swapper/222:49:072
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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