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2025-06-28 - 23:09
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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 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
2266516997113,39cyclictest2431371-21sleep12:00:003
2266516997033,37cyclictest0-21swapper/312:28:043
2266516997012,39cyclictest2397407-21sshd10:56:333
2266516996910,19cyclictest0-21swapper/309:16:023
226651699689,59cyclictest2356779-21ntpq09:45:233
2266516996830,38cyclictest873-21mta-sts-daemon11:18:073
2266516996829,19cyclictest0-21swapper/307:22:423
226651699679,39cyclictest2428556-21munin-run11:55:013
226651699678,58cyclictest2369647-21cat10:10:003
2266516996729,19cyclictest2299344-21ntpq08:05:223
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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