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2026-03-28 - 06:59
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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 Mar 28, 2026 00:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2508399234,11cyclictest18175-21python323:45:000
2509299220,4cyclictest10875-21tune2fs21:35:142
2509299220,21cyclictest0-21swapper/219:33:182
2508899220,21cyclictest843-21systemd-network21:56:031
25092992117,3cyclictest0-21swapper/219:51:442
25092992117,3cyclictest0-21swapper/219:51:432
2508899215,9cyclictest0-21swapper/119:37:131
2509299193,1cyclictest0-21swapper/200:02:352
2509299193,15cyclictest0-21swapper/222:25:202
2509299192,16cyclictest0-21swapper/223:54:102
25092991917,2cyclictest28-21ksoftirqd/223:15:132
25092991914,3cyclictest8782-21nfsd421:30:182
25088991914,3cyclictest0-21swapper/120:19:291
25083991917,1cyclictest0-21swapper/019:20:000
25083991915,3cyclictest0-21swapper/020:54:520
2508399190,18cyclictest0-21swapper/020:00:170
2509299182,1cyclictest0-21swapper/223:30:142
25092991816,1cyclictest0-21swapper/223:28:242
25092991816,1cyclictest0-21swapper/223:00:522
25092991814,3cyclictest16748-21snapd21:47:482
2509299181,2cyclictest1035-21thermald23:35:202
2509299180,3cyclictest1523-21lxd00:18:352
2509299180,17cyclictest8911-21proc_pri19:35:202
2509299180,17cyclictest25044-21munin-plugin-st21:05:002
25088991816,1cyclictest21-21ksoftirqd/122:09:001
25088991814,3cyclictest19540-21proxymap22:48:191
25088991813,4cyclictest0-21swapper/120:29:551
2508899181,16cyclictest13089-21ntpq22:35:171
2508399182,15cyclictest5895-21nfsd423:20:170
2508399182,15cyclictest32323-21processes21:15:180
2508399182,15cyclictest0-21swapper/023:00:140
2508399181,2cyclictest2170-21chrt20:22:050
2508399181,2cyclictest16749-21snapd22:05:180
2508399181,16cyclictest4035-21H222:10:210
2508399180,17cyclictest843-21systemd-network23:46:250
2508399180,17cyclictest843-21systemd-network23:46:240
2509299172,15cyclictest28-21ksoftirqd/221:26:472
25092991715,1cyclictest166992sleep200:37:152
25092991715,1cyclictest0-21swapper/222:50:152
25092991715,1cyclictest0-21swapper/220:35:172
25092991715,1cyclictest0-21swapper/219:25:212
25092991714,2cyclictest6546-21fschecks_time20:30:142
25092991714,2cyclictest4156-21fschecks_count22:20:152
25092991714,2cyclictest25428-21grep19:10:132
25092991714,2cyclictest24881-21ls23:55:132
25092991714,2cyclictest2024-21ls21:20:122
25092991714,2cyclictest20198-21nfsd423:45:172
25092991714,2cyclictest20198-21nfsd423:45:172
25092991714,2cyclictest16627-21chrt22:41:022
2509299171,15cyclictest20337-21fschecks_time20:55:142
2509299170,2cyclictest3707-21master22:32:332
2509299170,2cyclictest14116-21grep21:40:132
2509299170,1cyclictest0-21swapper/220:45:242
2509299170,16cyclictest30718-21taskset23:09:272
2509299170,16cyclictest30250-21fschecks_count20:15:132
2509299170,16cyclictest29716-21nfsd419:15:192
2509299170,16cyclictest2667-21anvil22:18:192
2509299170,16cyclictest26590-21ntpq21:05:172
2509299170,16cyclictest26159-21bounce20:07:492
2509299170,16cyclictest20308-21cat19:55:222
2509299170,16cyclictest16745-21snapd19:40:182
2509299170,16cyclictest1454-21ntpq20:20:192
2509299170,16cyclictest12853-21grep20:40:162
25088991715,1cyclictest0-21swapper/100:14:201
25088991714,2cyclictest5601-21lxd22:58:361
25088991714,2cyclictest4739-21apache_volume21:25:111
25088991714,2cyclictest4099-21H222:10:211
25088991714,2cyclictest29490-21cron00:05:001
25088991714,2cyclictest22715-21latency_hist22:55:001
25088991714,2cyclictest1079-21cups-browsed21:40:181
2508899171,1cyclictest0-21swapper/120:55:141
2508899171,15cyclictest183692chrt21:47:521
2508899171,15cyclictest12860-21latency_hist21:40:001
2508899170,3cyclictest0-21swapper/120:10:011
2508899170,2cyclictest7225-21ntpq20:30:171
2508899170,2cyclictest4666-21/usr/sbin/munin23:20:171
2508899170,2cyclictest3986-21H222:10:211
2508899170,2cyclictest3979-21H222:10:211
2508899170,2cyclictest31110-21grep00:05:181
2508899170,2cyclictest16766-21snapd23:28:141
2508899170,2cyclictest16748-21snapd20:09:531
2508899170,2cyclictest14000-21kernelversion19:45:161
2508899170,16cyclictest8829-21ntpq21:30:191
2508899170,16cyclictest6880-21smtpd19:33:101
2508899170,16cyclictest32705-21chrt20:20:131
2508899170,16cyclictest16813-21chrt22:43:181
2508899170,16cyclictest16793-21snapd21:20:181
2508899170,16cyclictest14693-21ls20:45:151
2508899170,16cyclictest0-21swapper/123:35:211
25083991715,1cyclictest24282chrt22:15:290
25083991714,2cyclictest9954-21latency22:30:170
25083991714,2cyclictest8598-21taskset22:30:010
25083991714,2cyclictest4085-21chrt23:18:000
25083991714,2cyclictest26011-21postgres20:05:530
25083991714,2cyclictest25027-21df_inode23:55:130
25083991714,2cyclictest22754-21expr21:00:140
25083991714,2cyclictest20532-21expr22:50:140
25083991714,2cyclictest20348-21sed19:55:230
25083991714,2cyclictest17729-21cat22:45:140
2508399171,15cyclictest14918-21chrt23:36:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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