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2026-05-18 - 14:48
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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 rackdslot0.osadl.org (updated Mon May 18, 2026 00:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1047299240,5cyclictest19429-21latency_hist23:15:010
1047799230,18cyclictest0-21swapper/222:04:502
10477992017,2cyclictest17096-21iwlist19:20:172
10477992015,4cyclictest0-21swapper/200:25:142
10472992017,2cyclictest3981-21H222:10:210
1047799192,16cyclictest30500-21smtpd23:33:502
10477991917,1cyclictest28-21ksoftirqd/223:06:452
1047799191,17cyclictest0-21swapper/200:00:222
1047799190,18cyclictest0-21swapper/221:40:142
1047799190,16cyclictest4035-21H222:10:212
1047399193,15cyclictest3981-21H222:10:211
1047399192,16cyclictest3981-21H222:10:211
10473991917,1cyclictest21-21ksoftirqd/123:31:021
10473991916,2cyclictest21-21ksoftirqd/123:35:121
10473991914,3cyclictest16749-21nfsd422:10:181
1047399190,16cyclictest3981-21H222:10:211
10472991917,1cyclictest0-21swapper/021:45:010
10472991917,1cyclictest0-21swapper/020:10:170
1047299190,2cyclictest3989-21H222:10:210
1047299190,16cyclictest3985-21H222:10:210
1047299190,16cyclictest3979-21H222:10:210
1047799182,15cyclictest19752-21mailstats22:15:222
10477991815,2cyclictest7464-21chrt22:51:072
10477991815,2cyclictest18262-21awk23:10:182
10477991814,3cyclictest3991-21H222:10:212
10477991814,3cyclictest3981-21H222:10:212
10477991814,3cyclictest27877-21cron23:30:012
1047799180,2cyclictest3985-21H222:10:212
1047799180,1cyclictest3989-21H222:10:212
1047799180,17cyclictest843-21systemd-network19:30:062
1047799180,17cyclictest20856-21grep23:15:172
1047799180,15cyclictest4099-21H222:10:212
10473991816,1cyclictest21-21ksoftirqd/121:48:171
10473991814,3cyclictest399-20systemd-journal23:55:001
10473991814,2cyclictest4035-21H222:10:211
1047399180,17cyclictest4099-21H222:10:211
1047399180,17cyclictest0-21swapper/122:05:131
1047399180,16cyclictest3985-21H222:10:211
1047399180,15cyclictest32267-21expr22:40:141
1047299182,15cyclictest9-21ksoftirqd/000:06:260
10472991815,2cyclictest3976-21H222:10:210
10472991814,3cyclictest4099-21H222:10:210
10472991814,3cyclictest0-21swapper/023:21:130
1047299181,16cyclictest7752-21ps20:00:200
1047299180,3cyclictest1522-21lxd21:24:510
1047299180,17cyclictest4035-21H222:10:210
1047299180,17cyclictest3979-21H222:10:210
1047299180,17cyclictest3976-21H222:10:210
1047299180,17cyclictest24317-21/usr/sbin/munin22:25:150
1047299180,15cyclictest3989-21H222:10:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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