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2025-06-29 - 00:51
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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 rackfslot7.osadl.org (updated Sat Jun 28, 2025 12:46:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2266516999516,59cyclictest2322059-21ntpq08:45:233
2266516999516,59cyclictest2322059-21ntpq08:45:223
2266516998810,59cyclictest2403002-21taskset11:06:113
2266516998769,18cyclictest0-21swapper/310:25:283
226651699835,59cyclictest2394905-21munin-run10:55:003
2266516997719,19cyclictest191rcu_preempt08:30:223
2266516997719,19cyclictest191rcu_preempt08:30:223
2266516997618,39cyclictest2439415-21users12:10:263
2266516997415,58cyclictest2292510-21/usr/sbin/munin07:55:143
2266516997211,59cyclictest2268235-21ntp_states07:10:273
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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