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2025-11-23 - 16:30
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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 Sun Nov 23, 2025 12:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
209946899625,18cyclictest0-21swapper/710:20:177
209946499612,0cyclictest191rcu_preempt11:35:183
2099465996019,40cyclictest2209170-21mailstats10:20:234
2099465995939,19cyclictest878-21mta-sts-daemon08:45:284
2099465995939,19cyclictest878-21mta-sts-daemon08:45:274
209946599590,58cyclictest2148856-21ntpq08:35:194
2099465995818,39cyclictest1089-21snmpd09:05:124
2099465995738,18cyclictest601ktimers/412:39:114
2099465995715,40cyclictest1089-21snmpd08:01:514
209946599570,38cyclictest2230185-21/usr/sbin/munin11:00:014
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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