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2026-07-25 - 08:03
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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 Sat Jul 25, 2026 00:45:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31936992914,1cyclictest0-21swapper/121:05:121
3193699230,5cyclictest0-21swapper/120:10:141
3193499230,5cyclictest6614-21sed23:10:000
3193999220,17cyclictest0-21swapper/220:36:272
3193999220,17cyclictest0-21swapper/220:36:272
3193699220,4cyclictest0-21swapper/119:53:171
3193499224,15cyclictest0-21swapper/020:45:140
31939992114,3cyclictest0-21swapper/220:30:142
3193699214,1cyclictest0-21swapper/119:30:211
3193699210,17cyclictest0-21swapper/120:50:011
3193999204,15cyclictest0-21swapper/220:54:212
3193999203,16cyclictest0-21swapper/219:22:502
3193699203,3cyclictest0-21swapper/119:46:111
3193699203,3cyclictest0-21swapper/100:06:181
3193699202,17cyclictest0-21swapper/100:01:121
31936992018,1cyclictest0-21swapper/119:55:141
3193699200,18cyclictest399-20systemd-journal20:31:441
31934992016,3cyclictest0-21swapper/023:57:520
31939991916,2cyclictest24086-21cat22:40:232
3193999190,16cyclictest3989-21H222:10:212
3193699193,15cyclictest0-21swapper/123:14:281
3193699192,1cyclictest0-21swapper/122:54:021
31936991916,2cyclictest2069-21systemd-udevd19:12:511
3193699190,18cyclictest399-20systemd-journal21:25:001
3193499193,15cyclictest0-21swapper/020:56:420
3193499193,11cyclictest14447-21munin-run21:30:010
3193499192,16cyclictest0-21swapper/020:17:030
31934991916,2cyclictest29575-21latency20:00:170
3193499190,3cyclictest20843-21apt-config23:35:000
3193999182,2cyclictest2886-21iscsid23:35:002
3193999182,15cyclictest84862chrt00:07:432
3193999182,15cyclictest10928-21sed22:20:012
3193999182,15cyclictest10928-21sed22:20:002
3193999182,15cyclictest0-21swapper/219:35:002
31939991816,1cyclictest28-21ksoftirqd/200:25:192
31939991816,1cyclictest16421-21switchtime19:35:212
31939991816,1cyclictest0-21swapper/221:58:522
31939991814,3cyclictest3989-21H222:10:212
31939991814,3cyclictest0-21swapper/222:31:432
3193999181,2cyclictest8805-21sed21:20:012
3193999181,2cyclictest6696-21nfsd422:10:182
3193999180,2cyclictest3976-21H222:10:212
3193999180,2cyclictest1856-21systemd-udevd21:50:522
3193999180,17cyclictest3987-21H222:10:212
3193999180,16cyclictest0-21swapper/219:16:322
3193699189,0cyclictest0-21swapper/123:35:021
3193699182,1cyclictest0-21swapper/121:35:131
3193699182,15cyclictest19708-21expr22:35:111
3193699180,3cyclictest5245-21tr20:15:151
3193699180,2cyclictest3976-21H222:10:211
3193699180,17cyclictest13352-21anvil22:22:281
3193699180,16cyclictest15798-21ls23:25:121
31934991815,2cyclictest3976-21H222:10:210
3193499181,1cyclictest0-21swapper/023:03:420
3193499181,16cyclictest32722-21expr21:05:120
3193499180,3cyclictest3983-21H222:10:210
3193499180,2cyclictest3989-21H222:10:210
3193999172,14cyclictest0-21swapper/222:27:302
31939991715,1cyclictest115092sleep219:29:192
31939991715,1cyclictest0-21swapper/200:30:212
31939991714,2cyclictest8310-21nvmesmart_nvme023:10:192
31939991714,2cyclictest3983-21H222:10:212
31939991714,2cyclictest3981-21H222:10:212
31939991714,2cyclictest3818-21/usr/sbin/munin22:05:192
31939991714,2cyclictest27565-21switchtime19:55:212
31939991714,2cyclictest23344-21timerandwakeup20:45:192
31939991714,2cyclictest12608-21chrt20:27:422
3193999170,3cyclictest0-21swapper/223:50:192
3193999170,2cyclictest3989-21H222:10:212
3193999170,2cyclictest30646-21expr22:55:142
3193999170,2cyclictest25443-21needreboot23:40:182
3193999170,2cyclictest18851-21apache_processe20:40:112
3193999170,2cyclictest1756-21if_eno123:00:152
3193999170,1cyclictest3981-21H222:10:212
3193999170,16cyclictest9242-21gpg-connect-age21:20:002
3193999170,16cyclictest3976-21H222:10:212
3193999170,16cyclictest3707-21master00:11:352
3193999170,16cyclictest31093-21awk21:00:202
3193999170,16cyclictest30925-21seq20:04:572
3193999170,16cyclictest27931-21/usr/sbin/munin23:45:162
3193999170,16cyclictest25954-21latency_hist21:50:012
3193999170,16cyclictest2069-21systemd-udevd21:38:522
3193999170,16cyclictest1854-21munin-plugin-st20:10:012
3193999170,16cyclictest17728-21latency_hist21:35:012
3193999170,16cyclictest14170-21ntp_kernel_pll_23:20:172
3193999170,16cyclictest1365-21nfsd423:55:172
3193999170,16cyclictest12457-21netstat22:20:182
3193999170,16cyclictest12023-21apache_accesses21:25:122
3193999170,16cyclictest0-21swapper/223:25:172
3193999170,15cyclictest3983-21H222:10:212
3193699172,15cyclictest21-21ksoftirqd/100:32:201
31936991715,1cyclictest29647-21latency20:00:161
31936991714,2cyclictest3985-21H222:10:211
31936991714,2cyclictest0-21swapper/121:10:121
31936991714,1cyclictest0-21swapper/123:31:041
3193699171,15cyclictest5130-21cat22:10:001
3193699171,15cyclictest0-21swapper/120:25:201
3193699170,2cyclictest9349-21grep22:15:181
3193699170,2cyclictest9349-21grep22:15:171
3193699170,2cyclictest870-21systemd-logind20:50:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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