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2026-05-09 - 14:31
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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 May 09, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21314959910426,59cyclictest1086-21runrttasks20:03:224
2131497999795,1cyclictest0-21swapper/522:50:105
2131490999391,1cyclictest0-21swapper/222:50:102
2131495998931,39cyclictest2173027-21cpu20:25:124
213149599856,78cyclictest236199-21snmpd22:05:024
2131490997416,39cyclictest43-21ksoftirqd/221:15:162
2131495997032,19cyclictest591rcuc/400:05:024
213149599678,39cyclictest0-21swapper/421:39:394
2131495996629,18cyclictest0-21swapper/423:29:244
2131495996628,38cyclictest601ktimers/420:37:404
213149599657,58cyclictest319-21ice-ptp-0000:f4:00.021:51:304
213149599656,20cyclictest2231170-21sed22:10:024
2131495996526,19cyclictest0-21swapper/423:54:584
2131495996424,40cyclictest0-21swapper/419:26:524
2131490996426,38cyclictest411rcuc/219:35:162
213149599635,39cyclictest2223020-21/usr/sbin/munin21:55:224
2131495996325,38cyclictest0-21swapper/420:10:264
2131495996324,39cyclictest0-21swapper/421:43:064
2131495996223,19cyclictest0-21swapper/423:59:414
2131495996223,19cyclictest0-21swapper/400:27:524
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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