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2026-06-10 - 00:32
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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 Tue Jun 09, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
950125490,10sleep016483-1kworker/0:2H+mmc_complete06:54:480
109749910892,9cyclictest0-21swapper/212:19:282
109749910052,14cyclictest181rcu_preempt10:10:022
1097499963,69cyclictest10737-21apt-get11:29:432
10974999456,13cyclictest181rcu_preempt11:27:402
99322937,55sleep210023-21/usr/sbin/munin06:56:102
10974999053,13cyclictest181rcu_preempt07:06:592
10965999060,18cyclictest2073-21latency_hist12:09:290
10965999060,18cyclictest2073-21latency_hist12:09:290
10974998950,17cyclictest181rcu_preempt08:39:282
10974998832,13cyclictest10952-21cyclictest10:55:332
10974998832,13cyclictest10952-21cyclictest10:55:332
10974998760,11cyclictest181rcu_preempt06:59:572
10974998736,10cyclictest181rcu_preempt10:39:282
1098099853,39cyclictest25911-21taskset11:54:473
1098099853,39cyclictest25911-21taskset11:54:473
10974998551,14cyclictest30340-21ssh09:19:322
10965998554,21cyclictest27912-21latency_hist07:49:290
10974998464,14cyclictest17883-21diskmemload11:34:552
10974998454,20cyclictest19037-21threads07:20:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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