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2026-05-09 - 08:09
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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
Characteristics of the 100 highest latencies:
System rackdslot0.osadl.org (updated Sat May 09, 2026 00:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2983499230,5cyclictest0-21swapper/220:45:592
2983499230,22cyclictest0-21swapper/200:10:122
2983399238,14cyclictest0-21swapper/100:31:071
2983499220,20cyclictest426-21systemd-udevd21:36:522
2983399220,21cyclictest843-21systemd-network22:53:231
2983299222,3cyclictest0-21swapper/023:49:060
2983499213,4cyclictest0-21swapper/219:51:052
2983499213,17cyclictest30455-21cpuspeed_turbos21:05:122
29833992118,2cyclictest19910-21mailstats19:45:211
29834992019,0cyclictest0-21swapper/223:42:462
29834992018,1cyclictest4728-21timerwakeupswit20:15:212
2983399204,15cyclictest0-21swapper/121:28:351
2983299202,2cyclictest32356-21wc20:10:130
2983299200,2cyclictest3420-21munin-run23:10:000
2983499193,15cyclictest28-21ksoftirqd/223:07:532
2983499193,15cyclictest19103-21nfsd421:40:162
2983499192,1cyclictest0-21swapper/222:44:122
2983499192,16cyclictest1623-21smtpd22:05:502
2983499190,2cyclictest3976-21H222:10:212
2983499190,2cyclictest3976-21H222:10:212
2983499190,16cyclictest4099-21H222:10:212
2983499190,16cyclictest3985-21H222:10:212
29833991917,1cyclictest19293-21switchtime23:35:191
29833991916,2cyclictest3989-21H222:10:211
2983399190,16cyclictest3985-21H222:10:211
2983399190,16cyclictest3981-21H222:10:211
2983399190,16cyclictest18014-21grep21:40:121
2983299190,1cyclictest0-21swapper/019:45:010
2983299190,16cyclictest3983-21H222:10:210
29834991815,2cyclictest22405-21ntp_offset21:45:182
29834991815,2cyclictest1856-21systemd-udevd19:30:522
29834991814,3cyclictest4099-21H222:10:212
29834991814,1cyclictest0-21swapper/219:10:202
2983499181,2cyclictest3987-21H222:10:212
2983499181,2cyclictest18913-21chrt20:43:552
2983499180,2cyclictest3979-21H222:10:212
2983499180,17cyclictest5396-21ntp_states23:10:172
2983499180,17cyclictest3991-21H222:10:212
2983499180,17cyclictest3987-21H222:10:212
2983499180,16cyclictest29182-21cron20:05:012
2983499180,15cyclictest3985-21H222:10:212
2983399182,15cyclictest21-21ksoftirqd/120:41:281
29833991816,1cyclictest0-21swapper/120:45:171
29833991815,2cyclictest24501-21nfsd423:45:171
29833991815,2cyclictest16531-21cat00:30:001
2983399180,3cyclictest32449-21cat20:10:131
2983399180,2cyclictest3991-21H222:10:211
2983399180,15cyclictest3981-21H222:10:211
2983299183,1cyclictest9-21ksoftirqd/023:59:470
2983299182,15cyclictest0-21swapper/019:20:590
29832991816,1cyclictest0-21swapper/021:19:450
29832991814,3cyclictest3979-21H222:10:210
2983299180,2cyclictest3987-21H222:10:210
2983299180,17cyclictest7450-21sed20:20:220
2983299180,16cyclictest3983-21H222:10:210
2983299180,16cyclictest24913-21tail21:50:170
2983499172,15cyclictest0-21swapper/220:53:462
29834991717,0cyclictest0-21swapper/219:45:162
29834991715,1cyclictest0-21swapper/221:20:122
29834991715,1cyclictest0-21swapper/200:36:272
29834991714,2cyclictest3991-21H222:10:212
29834991714,2cyclictest27190-21sort23:50:152
29834991714,2cyclictest25255-21trivial-rewrite23:46:292
29834991714,2cyclictest24384-21tune2fs21:50:142
29834991714,2cyclictest0-21swapper/221:13:022
29834991714,2cyclictest0-21swapper/219:15:452
29834991714,1cyclictest0-21swapper/220:01:052
29834991713,3cyclictest3981-21H222:10:212
2983499170,2cyclictest6815-21cpuspeed_turbos23:15:122
2983499170,2cyclictest3985-21H222:10:212
2983499170,2cyclictest3983-21H222:10:212
2983499170,2cyclictest16151-21nfsd423:30:182
2983499170,16cyclictest3985-21H222:10:212
2983499170,16cyclictest3981-21H222:10:212
2983499170,16cyclictest32432-21expr00:00:142
2983499170,16cyclictest28416-21vmstat21:55:212
2983499170,16cyclictest27862-21expr22:55:132
2983499170,16cyclictest25163-21cat22:50:122
2983499170,16cyclictest25139-21ntp_offset19:55:182
2983499170,16cyclictest2069-21systemd-udevd22:20:522
2983499170,16cyclictest2007-21systemd-journal00:25:292
2983499170,16cyclictest11869-21hddtemp_smartct00:20:142
2983499170,16cyclictest1100-21snmpd20:56:252
29833991715,1cyclictest0-21swapper/121:20:171
29833991715,1cyclictest0-21swapper/119:40:171
29833991714,2cyclictest4099-21H222:10:211
29833991714,2cyclictest3976-21H222:10:211
29833991714,2cyclictest3976-21H222:10:211
29833991714,2cyclictest30240-21cpuspeed_turbos19:10:131
29833991714,2cyclictest1521-21lxd22:48:511
29833991714,2cyclictest11586-21expr20:30:141
29833991714,2cyclictest0-21swapper/123:43:511
29833991714,2cyclictest0-21swapper/100:00:181
29833991713,3cyclictest3979-21H222:10:211
2983399171,15cyclictest3985-21H222:10:211
2983399171,15cyclictest24954-21nfsd421:50:171
2983399171,15cyclictest0-21swapper/100:06:561
2983399171,15cyclictest0-21swapper/100:06:561
2983399170,2cyclictest7858-21master00:13:311
2983399170,2cyclictest3987-21H222:10:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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