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2026-07-26 - 14:03
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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 Sun Jul 26, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2701399310,0cyclictest0-21swapper/121:00:151
2701799300,1cyclictest0-21swapper/221:05:132
2700899233,13cyclictest31308-21munin-run22:10:000
27013992213,9cyclictest0-21swapper/100:10:021
2701399220,4cyclictest0-21swapper/120:06:481
2701799210,3cyclictest0-21swapper/219:25:562
2701799210,20cyclictest843-21systemd-network20:26:022
2701799210,20cyclictest3991-21H222:10:212
27008992118,2cyclictest3599-21sed21:20:000
27008992118,2cyclictest31808-21cat22:10:010
2700899210,3cyclictest0-21swapper/000:27:400
2700899210,20cyclictest843-21systemd-network19:50:290
2701799200,17cyclictest3989-21H222:10:212
2701399204,15cyclictest3981-21H222:10:211
2701399202,11cyclictest3023-21http21:20:011
27013992017,2cyclictest2872-21systemd-logind21:48:521
27008992013,6cyclictest0-21swapper/023:45:000
2701799192,16cyclictest2756-21chrt21:19:252
27017991911,3cyclictest0-21swapper/200:06:032
2701799190,2cyclictest4035-21H222:10:212
2701799190,1cyclictest0-21swapper/222:30:192
27013991918,0cyclictest0-21swapper/122:51:351
27013991917,1cyclictest0-21swapper/121:30:531
27013991916,2cyclictest7313-21cpuspeed_turbos00:15:161
27013991916,2cyclictest26664-21ls22:55:171
27013991914,4cyclictest0-21swapper/121:21:041
2701399190,4cyclictest843-21systemd-network22:33:551
2701399190,18cyclictest843-21systemd-network23:30:371
2701399190,17cyclictest4099-21H222:10:211
2701399190,16cyclictest3991-21H222:10:211
2701399190,16cyclictest3981-21H222:10:211
27008991916,2cyclictest1856-21systemd-udevd23:32:520
27008991916,1cyclictest9-21ksoftirqd/021:05:330
2700899190,3cyclictest32451-21nfsd420:15:190
2700899190,2cyclictest3991-21H222:10:210
2700899190,18cyclictest0-21swapper/022:25:130
2701799182,1cyclictest0-21swapper/221:25:402
2701799182,15cyclictest30394-21expr21:10:142
27017991816,1cyclictest0-21swapper/223:10:142
27017991815,2cyclictest3981-21H222:10:212
27017991814,3cyclictest4035-21H222:10:212
27017991814,3cyclictest3976-21H222:10:212
27017991814,3cyclictest0-21swapper/223:07:162
27017991814,3cyclictest0-21swapper/223:07:162
27017991814,3cyclictest0-21swapper/222:53:242
27017991814,2cyclictest28227-21grep23:55:152
2701799181,16cyclictest20387-21wc19:55:152
2701799180,3cyclictest31627-21latency_hist22:10:012
2701799180,3cyclictest0-21swapper/221:21:442
2701799180,2cyclictest3991-21H222:10:212
2701799180,17cyclictest843-21systemd-network20:23:592
2701799180,17cyclictest3707-21master00:16:262
2701399182,15cyclictest0-21swapper/123:12:281
27013991816,1cyclictest0-21swapper/121:35:301
27013991814,3cyclictest31839-21fschecks_count20:15:151
2701399180,17cyclictest0-21swapper/120:57:171
2701399180,15cyclictest3976-21H222:10:211
2700899183,1cyclictest0-21swapper/021:22:170
27008991816,1cyclictest0-21swapper/022:25:000
27008991814,3cyclictest4099-21H222:10:210
27008991814,3cyclictest0-21swapper/023:10:180
2700899180,1cyclictest0-21swapper/022:15:140
2700899180,16cyclictest3987-21H222:10:210
2700899180,15cyclictest3981-21H222:10:210
27017991715,1cyclictest0-21swapper/220:35:182
27017991714,2cyclictest9419-21ls23:20:222
27017991714,2cyclictest8488-21tr22:25:152
27017991714,2cyclictest4023-21PluginScanner19:11:552
27017991714,2cyclictest3976-21H222:10:212
27017991714,2cyclictest31352-21nfsd419:15:182
27017991714,2cyclictest28277-21date23:00:002
27017991714,2cyclictest25523-21latency_hist20:05:012
27017991714,2cyclictest21639-21cat21:50:192
27017991714,2cyclictest20059-21fschecks_time22:45:162
27017991714,2cyclictest16514-21munin-run22:40:012
27017991714,2cyclictest14619-21/usr/sbin/munin19:45:222
27017991714,2cyclictest13292-21latency_hist23:30:002
27017991714,2cyclictest12246-21chrt00:24:172
27017991714,2cyclictest1079-21cups-browsed23:15:232
27017991714,1cyclictest0-21swapper/219:20:182
27017991713,3cyclictest0-21swapper/200:26:062
2701799170,2cyclictest3987-21H222:10:212
2701799170,2cyclictest21680-21apache_volume20:55:132
2701799170,2cyclictest18603-21sshd23:37:042
2701799170,2cyclictest14408-21latency23:30:172
2701799170,1cyclictest0-21swapper/223:03:562
2701799170,16cyclictest4099-21H222:10:212
2701799170,16cyclictest3981-21H222:10:212
2701799170,16cyclictest31920-21grep00:00:222
2701799170,16cyclictest27320-21awk22:00:192
2701799170,16cyclictest25581-21perf22:00:002
2701799170,16cyclictest23527-21grep23:45:182
2701799170,16cyclictest16684-21apache_accesses22:40:122
2701799170,16cyclictest16684-21apache_accesses22:40:112
2701799170,16cyclictest1615-21latency_hist20:20:022
2701799170,16cyclictest14063-21timerwakeupswit21:35:232
2701799170,16cyclictest0-21swapper/222:22:212
2701399172,1cyclictest0-21swapper/123:59:301
27013991714,2cyclictest6285-21fschecks_time22:20:151
27013991714,2cyclictest3981-21H222:10:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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