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2026-05-03 - 12:10
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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 Sun May 03, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3210099230,18cyclictest0-21swapper/200:25:182
3210099212,13cyclictest0-21swapper/219:42:522
3208999210,17cyclictest0-21swapper/021:20:010
32100992017,2cyclictest10078-21cron22:20:002
32100992015,3cyclictest0-21swapper/222:35:192
32100992015,3cyclictest0-21swapper/222:35:182
32095992014,3cyclictest0-21swapper/100:05:191
3208999204,15cyclictest21357-21grep23:35:150
3210099194,1cyclictest0-21swapper/223:20:172
3210099194,1cyclictest0-21swapper/223:03:132
3210099193,15cyclictest17365-21timerandwakeup20:35:212
32095991917,1cyclictest0-21swapper/119:55:131
32095991916,2cyclictest14893-21http_loadtime00:20:151
32095991915,3cyclictest0-21swapper/120:44:311
3209599190,18cyclictest843-21systemd-network21:55:161
3209599190,16cyclictest11350-21apache_volume19:30:131
32089991916,1cyclictest0-21swapper/019:25:570
3208999190,18cyclictest11365-21cat21:25:000
3210099183,1cyclictest0-21swapper/219:38:492
3210099182,15cyclictest22255-21chrt23:35:202
3210099182,15cyclictest0-21swapper/223:30:152
32100991815,2cyclictest26249-21sendmail-mta20:54:452
32100991814,3cyclictest0-21swapper/221:35:202
3210099180,3cyclictest24805-21python319:55:002
3210099180,17cyclictest3261-21nfsd422:05:182
3209599180,17cyclictest3987-21H222:10:211
3209599180,17cyclictest0-21swapper/119:50:121
3208999183,15cyclictest9-21ksoftirqd/020:00:180
32089991815,2cyclictest14830-21needreboot22:25:160
3208999180,17cyclictest5601-21lxd22:14:500
3208999180,17cyclictest16751-21latency_hist21:35:020
32100991714,2cyclictest9503-21tr23:15:122
32100991714,2cyclictest6346-21cpuspeed_turbos21:15:152
32100991714,2cyclictest3989-21H222:10:212
32100991714,2cyclictest387-21nvmesmart_nvme022:00:182
32100991714,2cyclictest27352-21nvmesmart_nvme021:50:212
32100991714,2cyclictest27241-21munin-plugin-st22:50:002
32100991714,2cyclictest23899-21grep21:45:152
32100991714,2cyclictest23899-21grep21:45:142
32100991714,2cyclictest16953-21cat21:35:012
32100991714,2cyclictest1517-21lxd22:32:492
32100991714,2cyclictest14499-21snapd22:10:462
32100991714,2cyclictest1079-21cups-browsed23:10:212
32100991714,2cyclictest1079-21cups-browsed23:05:212
32100991714,2cyclictest10685-21chrt19:27:012
32100991714,2cyclictest0-21swapper/219:10:172
3210099171,2cyclictest32275-21taskset22:56:522
3210099171,15cyclictest29558-21chrt22:52:032
3210099170,2cyclictest5775-21chrt21:14:482
3210099170,2cyclictest31910-21chrt21:01:432
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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