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2025-11-08 - 13:49
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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
Characteristics of the 50 highest latencies:
System rackeslot2.osadl.org (updated Sat Nov 08, 2025 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29092902380,2sleep02909296-21irqrtprio19:10:520
2907905992421,2cyclictest3177944-21grep22:20:000
2907905992315,7cyclictest3104401-21kthreadcore21:35:550
2907905992310,6cyclictest0-21swapper/022:20:520
2907907992219,1cyclictest0-21swapper/200:40:002
2907906992219,2cyclictest3151741-21latency_hist22:05:021
2907906992217,4cyclictest3083603-21sort21:25:481
2907905992219,2cyclictest3401722-21cron00:30:000
2907906992117,3cyclictest1700-21systemd-logind22:50:011
2907906992117,3cyclictest1631-21gmain22:45:021
290790599219,4cyclictest0-21swapper/000:25:000
302487291200,2phc2sys0-21swapper/300:10:503
2907907992018,1cyclictest0-21swapper/219:40:012
2907907992017,1cyclictest0-21swapper/222:55:012
2907907992017,1cyclictest0-21swapper/222:55:012
2907906992017,2cyclictest3314815-21systemd23:40:001
2907906992017,2cyclictest3082176-21grep21:25:001
2907906992010,5cyclictest0-21swapper/123:59:591
2907905992010,5cyclictest0-21swapper/000:40:010
2907906991916,2cyclictest3396693-21kthreadcore00:25:541
2907906991916,2cyclictest3108099-21cron21:40:001
2907906991911,3cyclictest0-21swapper/121:45:011
2907906991910,4cyclictest0-21swapper/122:35:021
2907905991912,6cyclictest3077107-21kthreadcore21:20:530
31326552180,3sleep13132665-21ssh21:52:041
302487291180,3phc2sys0-21swapper/319:50:513
302487291180,2phc2sys0-21swapper/322:31:233
302487291180,2phc2sys0-21swapper/322:01:413
2907907991816,1cyclictest0-21swapper/223:55:012
2907907991815,1cyclictest0-21swapper/222:05:012
2907907991815,1cyclictest0-21swapper/219:15:012
2907906991815,2cyclictest2995912-21cpu20:20:461
2907906991810,3cyclictest3403708-21irqrtprio00:30:521
290790599189,4cyclictest0-21swapper/023:40:010
2907905991815,2cyclictest2917152-21cut19:15:490
2907905991815,2cyclictest0-21swapper/022:50:010
290790599181,12cyclictest3239588-21/usr/sbin/munin22:55:570
2907905991810,4cyclictest3332908-21aten2.4-expect23:50:460
302487291170,2phc2sys0-21swapper/321:24:533
2907907991714,1cyclictest0-21swapper/223:10:522
2907907991714,1cyclictest0-21swapper/222:10:012
2907907991714,1cyclictest0-21swapper/222:10:012
2907907991714,1cyclictest0-21swapper/221:45:002
2907907991714,1cyclictest0-21swapper/220:45:002
2907907991714,1cyclictest0-21swapper/219:35:012
2907907991713,2cyclictest0-21swapper/223:16:112
290790699178,4cyclictest0-21swapper/123:05:021
2907906991714,2cyclictest3209991-21timerandwakeup22:35:581
2907906991714,2cyclictest1700-21systemd-logind21:10:011
2907906991714,2cyclictest1-21systemd20:55:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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