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2025-09-16 - 23:07
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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 Tue Sep 16, 2025 12:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2030699234,18cyclictest0-21swapper/008:49:060
2030899220,21cyclictest823-21systemd-network11:01:442
2030899220,18cyclictest0-21swapper/210:32:002
2030899200,20cyclictest0-21swapper/208:52:492
2030899200,18cyclictest3245-21apache208:25:012
2030799203,16cyclictest1-21systemd10:05:011
2030899192,1cyclictest0-21swapper/207:23:312
20308991917,1cyclictest0-21swapper/209:04:302
20308991915,3cyclictest4734-21smtp07:39:282
20307991917,1cyclictest0-21swapper/111:10:361
20307991917,1cyclictest0-21swapper/111:10:361
20307991916,1cyclictest0-21swapper/112:35:001
20307991914,2cyclictest4532-21H212:26:331
20307991914,2cyclictest4532-21H212:26:331
2030799190,18cyclictest30816-21munin-run10:20:011
2030799190,17cyclictest25076-21nfsd409:10:191
20306991917,1cyclictest0-21swapper/010:01:390
20306991916,2cyclictest17456-21systemctl10:50:220
20308991816,1cyclictest0-21swapper/210:03:242
2030799182,15cyclictest16284-21nfsd408:55:191
2030799182,15cyclictest0-21swapper/111:49:271
2030799182,15cyclictest0-21swapper/109:30:011
2030799182,15cyclictest0-21swapper/109:30:011
2030799182,15cyclictest0-21swapper/107:49:091
20307991816,1cyclictest4538-21H212:26:331
20307991816,1cyclictest0-21swapper/109:34:411
20307991814,3cyclictest4536-21H212:26:331
20307991813,3cyclictest20922-21latency_hist11:55:001
2030799180,17cyclictest20357-21sshd09:03:581
2030799180,17cyclictest11729-21grep09:45:151
2030699182,2cyclictest29077-21chrt11:12:390
2030699182,2cyclictest29077-21chrt11:12:390
20306991816,1cyclictest0-21swapper/007:28:090
20306991814,3cyclictest22550-21sed10:05:030
2030699180,17cyclictest0-21swapper/012:25:000
2030699180,16cyclictest4593-21H212:26:330
2030699180,16cyclictest4536-21H212:26:330
2030699180,15cyclictest4536-21H212:26:330
2030899172,15cyclictest28-21ksoftirqd/212:24:462
20308991716,1cyclictest28-21ksoftirqd/210:16:442
20308991715,1cyclictest0-21swapper/211:55:172
20308991715,1cyclictest0-21swapper/209:23:002
20308991715,1cyclictest0-21swapper/208:20:022
20308991715,1cyclictest0-21swapper/207:15:202
20308991714,2cyclictest9703-21expr08:45:152
20308991714,2cyclictest7147-21sed07:40:252
20308991714,2cyclictest29746-21awk11:15:142
20308991714,2cyclictest22838-21/usr/sbin/munin10:05:172
20308991714,2cyclictest15507-21latency_hist10:50:012
20308991713,3cyclictest9837-21cat11:35:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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