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2025-12-18 - 21:27
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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 50 highest latencies:
System rackfslot7.osadl.org (updated Thu Dec 18, 2025 12:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3476157998684,1cyclictest3475934-21latency_hist07:10:013
3476157998137,39cyclictest3659818-21switchtime12:30:223
3476157997878,0cyclictest3629634-21systemctl11:40:023
347615599750,1cyclictest0-21swapper/109:30:171
3476157997437,18cyclictest3633891-21ntpq11:45:203
3476157997335,19cyclictest3569218-21taskset09:51:093
3476157997315,39cyclictest3626810-21systemctl11:35:023
3476157997233,39cyclictest0-21swapper/312:11:303
3476157997132,38cyclictest3551115-21latency09:20:183
3476157997131,39cyclictest0-21swapper/308:30:163
3476157997112,19cyclictest0-21swapper/310:23:503
3476157997032,19cyclictest0-21swapper/307:26:503
3476157996913,18cyclictest52-21ksoftirqd/307:30:243
3476157996911,39cyclictest3507389-21kworker/u32:4+events_unbound09:10:203
3476157996829,39cyclictest0-21swapper/308:41:483
3476157996829,39cyclictest0-21swapper/308:41:473
3476157996828,39cyclictest0-21swapper/310:09:343
347615799677,2cyclictest0-21swapper/308:45:153
3476157996626,39cyclictest0-21swapper/311:27:303
347615799657,39cyclictest3620500-21dpkg-deb11:21:223
347615799656,40cyclictest3533178-21kworker/u32:1+events_unbound10:42:423
3476157996526,19cyclictest0-21swapper/310:46:433
3476157996525,39cyclictest0-21swapper/307:48:553
347615799646,39cyclictest3562906-21ntp_states09:40:203
3476157996446,18cyclictest52-21ksoftirqd/311:09:523
3476157996425,39cyclictest0-21swapper/312:07:123
3476157996425,39cyclictest0-21swapper/307:21:023
3476157996324,39cyclictest0-21swapper/311:57:403
3476157996324,39cyclictest0-21swapper/307:11:263
347615799624,39cyclictest3481575-21sshd07:19:063
3476157996224,19cyclictest3592326-21munin-run10:35:023
347615799613,39cyclictest3601101-21kworker/u32:4+events_unbound10:59:323
3476157996020,19cyclictest5150ktimers/312:38:463
347615799600,40cyclictest3494350-21/usr/sbin/munin07:40:183
3476157995919,19cyclictest5150ktimers/308:02:023
3476157995839,19cyclictest511ktimers/310:16:143
347615599580,19cyclictest0-21swapper/111:05:171
3476157995719,18cyclictest0-21swapper/309:35:103
3476157995718,39cyclictest3636778-21ntpq11:50:223
3476157995717,19cyclictest3580457-21taskset10:11:183
347615799570,55cyclictest3510217-21apt-get08:10:123
3476157995618,19cyclictest3549985-21cat09:20:013
3476157995617,19cyclictest876-21mta-sts-daemon12:16:383
3476157995515,19cyclictest5150ktimers/307:51:383
3476159995416,19cyclictest0-21swapper/511:25:175
3476157995435,19cyclictest3490530-21/usr/sbin/munin07:35:203
3476157995418,35cyclictest0-21swapper/310:39:523
3476157995416,19cyclictest501rcuc/309:55:203
3476157995415,19cyclictest0-21swapper/311:10:103
3476157995414,39cyclictest0-21swapper/307:56:303
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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