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2026-09-14 - 21:51
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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 792 highest latencies:
System rackdslot0.osadl.org (updated Mon Sep 14, 2026 12:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1990899230,18cyclictest10465-21tr10:40:132
1990899228,13cyclictest0-21swapper/212:28:002
1990899224,3cyclictest880-21rs:main2
1990399220,21cyclictest843-21systemd-network09:48:561
1989999220,18cyclictest0-21swapper/010:34:080
1990899213,12cyclictest0-21swapper/211:47:552
1990899210,20cyclictest843-21systemd-network11:52:592
1990399213,16cyclictest10900-21latency_hist12:35:001
19903992121,0cyclictest0-21swapper/111:40:161
1989999210,6cyclictest426-21systemd-udevd08:46:520
19908992013,4cyclictest25737-21perf09:15:002
1990899201,16cyclictest3976-21H222:10:212
1990899201,15cyclictest0-21swapper/207:47:312
1990899200,3cyclictest0-21swapper/212:35:132
1990399202,17cyclictest9496-21smtpd07:45:471
19903992017,2cyclictest3414-21master11:54:451
19903992017,2cyclictest3012-21expr12:20:131
1990399200,15cyclictest0-21swapper/109:10:011
1989999202,11cyclictest6275-21perf11:30:000
1990899193,1cyclictest28-21ksoftirqd/210:38:232
19908991917,1cyclictest28-21ksoftirqd/209:38:002
1990399194,1cyclictest0-21swapper/110:32:251
1990399193,2cyclictest21243-21cron10:05:001
1990399193,15cyclictest5474-21mailstats08:35:211
1990399193,15cyclictest21-21ksoftirqd/107:20:011
1990399193,15cyclictest0-21swapper/109:20:011
1990399192,2cyclictest17631-21grep08:00:221
1990399192,2cyclictest15443-21cat08:55:121
19903991917,1cyclictest0-21swapper/109:38:511
19903991916,2cyclictest3991-21H222:10:211
19903991916,2cyclictest27586-21wc08:20:131
19903991916,2cyclictest0-21swapper/109:40:201
19903991916,2cyclictest0-21swapper/109:40:201
19903991914,4cyclictest13285-21expr07:55:141
19903991914,4cyclictest13285-21expr07:55:141
19903991914,4cyclictest0-21swapper/108:50:451
1990399191,17cyclictest29300-21nfsd410:15:171
1990399190,16cyclictest3981-21H222:10:211
19899991915,3cyclictest0-21swapper/009:20:190
19899991914,4cyclictest843-21systemd-network11:49:220
1989999190,18cyclictest0-21swapper/011:14:210
1990899183,1cyclictest28-21ksoftirqd/208:04:192
1990899182,15cyclictest0-21swapper/207:21:002
19908991816,1cyclictest28-21ksoftirqd/208:56:162
19908991816,1cyclictest0-21swapper/212:00:382
19908991816,1cyclictest0-21swapper/211:15:432
19908991816,1cyclictest0-21swapper/211:10:162
19908991815,2cyclictest26844-21chrt11:09:302
19908991814,3cyclictest3976-21H222:10:212
1990899181,16cyclictest2453-21systemctl08:30:212
1990899180,2cyclictest3989-21H222:10:212
1990899180,2cyclictest3981-21H222:10:212
1990899180,17cyclictest0-21swapper/209:44:122
1990899180,17cyclictest0-21swapper/209:44:122
1990899180,16cyclictest24222-21python310:10:012
1990899180,16cyclictest24222-21python310:10:012
1990399182,15cyclictest0-21swapper/112:17:251
1990399182,15cyclictest0-21swapper/112:17:251
1990399182,15cyclictest0-21swapper/110:40:131
1990399182,15cyclictest0-21swapper/110:36:411
19903991816,1cyclictest0-21swapper/111:30:131
19903991816,1cyclictest0-21swapper/111:00:011
19903991816,1cyclictest0-21swapper/109:55:151
19903991816,1cyclictest0-21swapper/108:10:211
19903991815,2cyclictest30058-21sed07:25:211
19903991815,2cyclictest25436-21sed12:00:211
19903991815,2cyclictest2347-21if_eno107:35:171
19903991815,2cyclictest21824-21cut11:55:161
19903991815,2cyclictest15988-21cut09:55:011
19903991815,2cyclictest0-21swapper/111:05:141
19903991815,2cyclictest0-21swapper/108:05:141
19903991814,3cyclictest29724-21pluginstate11:15:001
19903991814,3cyclictest25958-21wc07:20:141
19903991814,3cyclictest0-21swapper/110:45:141
19903991814,3cyclictest0-21swapper/109:00:141
1990399181,2cyclictest30466-21cpu08:25:141
1990399181,2cyclictest24962-21chrt10:10:101
1990399181,2cyclictest0-21swapper/108:15:151
1990399181,16cyclictest32405-21sendmail_mailqu10:20:201
1990399181,16cyclictest0-21swapper/112:05:131
1990399181,16cyclictest0-21swapper/108:44:201
1990399180,17cyclictest0-21swapper/112:25:131
1990399180,16cyclictest0-21swapper/107:33:241
1989999182,1cyclictest9-21ksoftirqd/012:06:340
1989999182,15cyclictest0-21swapper/012:00:210
19899991816,1cyclictest9-21ksoftirqd/008:25:010
19899991814,3cyclictest455-21plymouthd10:40:130
1989999181,2cyclictest6605-21ps09:35:200
1989999181,2cyclictest30560-21expr08:25:140
1989999181,16cyclictest29092-21grep07:25:150
1989999180,2cyclictest3976-21H222:10:210
19908991714,2cyclictest31611-21expr07:30:122
19908991714,2cyclictest21612-21munin-run08:10:012
19908991714,2cyclictest1516-21lxd11:36:452
19908991714,1cyclictest0-21swapper/209:51:252
19908991713,2cyclictest3976-21H222:10:212
1990899171,15cyclictest7050-21chrt07:44:352
1990899170,2cyclictest8014-21nfsd408:40:172
1990899170,2cyclictest6192-21timerwakeupswit10:30:202
1990899170,2cyclictest4383-21awk07:40:012
1990899170,2cyclictest3987-21H222:10:212
1990899170,2cyclictest31535-21grep10:20:142
1990899170,1cyclictest3987-21H222:10:212
1990899170,16cyclictest8725-21expr12:30:132
1990899170,16cyclictest683-21gpgv11:20:012
1990899170,16cyclictest4035-21H222:10:212
1990899170,16cyclictest3985-21H222:10:212
1990899170,16cyclictest3979-21H222:10:212
1990899170,16cyclictest3837-21/usr/sbin/munin08:35:132
1990899170,16cyclictest31050-21fschecks_count08:25:152
1990899170,16cyclictest30019-21idleruntime12:10:132
1990899170,16cyclictest28573-21expr10:15:132
1990899170,16cyclictest26802-21expr12:05:132
1990899170,16cyclictest26623-21expr09:15:132
1990899170,16cyclictest25832-21awk08:15:192
1990899170,16cyclictest19925-21/usr/sbin/munin10:00:152
1990899170,16cyclictest17994-21grep09:00:142
1990899170,16cyclictest17564-21ntp_kernel_pll_09:55:202
1990899170,16cyclictest16864-21memory10:50:152
1990899170,16cyclictest13375-21expr07:55:142
1990899170,16cyclictest13375-21expr07:55:142
19903991715,1cyclictest0-21swapper/110:55:211
19903991714,2cyclictest3979-21H222:10:211
19903991714,2cyclictest2452-21grep10:25:171
19903991714,2cyclictest23414-21taskset09:10:111
19903991714,2cyclictest16190-21expr10:50:121
19903991713,3cyclictest0-21swapper/111:45:001
19903991713,1cyclictest0-21swapper/112:35:131
1990399171,15cyclictest201rcuc/111:30:011
1990399171,15cyclictest0-21swapper/111:20:141
1990399170,3cyclictest23470-21timerandwakeup10:05:221
1990399170,3cyclictest23470-21timerandwakeup10:05:221
1990399170,2cyclictest3981-21H222:10:211
1990399170,2cyclictest32373-21apt-get11:20:001
1990399170,2cyclictest28835-21cron12:14:551
1990399170,1cyclictest0-21swapper/107:43:511
1990399170,16cyclictest0-21swapper/107:10:221
1990399170,15cyclictest3987-21H222:10:211
19899991715,1cyclictest6082chrt10:23:310
19899991714,2cyclictest3981-21H222:10:210
19899991714,2cyclictest3981-21H222:10:210
19899991714,2cyclictest28004-21lxd09:56:450
19899991714,2cyclictest27022-21iwlist09:15:150
19899991714,2cyclictest19931-21latency08:05:170
19899991714,2cyclictest1526-21lxd09:14:450
19899991714,0cyclictest111rcu_preempt07:50:170
1989999171,15cyclictest0-21swapper/012:15:130
1989999171,15cyclictest0-21swapper/012:15:130
1989999171,15cyclictest0-21swapper/007:10:520
1989999170,2cyclictest6538-21memory12:25:170
1989999170,2cyclictest3979-21H222:10:210
1989999170,2cyclictest29498-21grep10:15:180
1989999170,2cyclictest1522-21lxd08:14:440
1989999170,2cyclictest14198-21nfsd407:55:180
1989999170,2cyclictest14198-21nfsd407:55:180
1989999170,2cyclictest1035-21thermald08:40:190
1989999170,1cyclictest0-21swapper/010:25:270
1989999170,1cyclictest0-21swapper/007:34:250
1989999170,16cyclictest7499-21/usr/sbin/munin07:45:140
1989999170,16cyclictest7382-21expr11:30:130
1989999170,16cyclictest4559-21cut08:35:160
1989999170,16cyclictest4035-21H222:10:210
1989999170,16cyclictest3991-21H222:10:210
1989999170,16cyclictest3981-21H222:10:210
1989999170,16cyclictest3979-21H222:10:210
1989999170,16cyclictest3976-21H222:10:210
1989999170,16cyclictest21497-21apt-config11:00:010
1989999170,16cyclictest15514-21expr08:55:120
1989999170,16cyclictest10761-21date12:35:000
19908991614,1cyclictest0-21swapper/210:55:182
19908991614,1cyclictest0-21swapper/210:45:122
19908991614,1cyclictest0-21swapper/208:50:132
19908991614,1cyclictest0-21swapper/208:20:182
19908991614,1cyclictest0-21swapper/207:50:172
1990899160,1cyclictest0-21swapper/211:40:112
1990899160,15cyclictest24949-21find10:10:102
1990899160,15cyclictest0-21swapper/212:20:142
1990899160,15cyclictest0-21swapper/209:45:162
1990899160,15cyclictest0-21swapper/207:10:042
19903991614,1cyclictest0-21swapper/108:30:141
1990399160,15cyclictest21-21ksoftirqd/107:50:121
19899991614,1cyclictest0-21swapper/011:55:130
19899991614,1cyclictest0-21swapper/011:50:160
19899991614,1cyclictest0-21swapper/011:20:170
19899991614,1cyclictest0-21swapper/010:05:100
19899991614,1cyclictest0-21swapper/010:05:100
19899991614,1cyclictest0-21swapper/009:25:140
19899991614,1cyclictest0-21swapper/008:00:140
1989999161,14cyclictest0-21swapper/010:55:160
1989999160,2cyclictest3981-21H222:10:210
1989999160,2cyclictest17797-21apt-get09:00:130
1989999160,2cyclictest1300-21lxd07:40:440
1989999160,1cyclictest11566-21tune2fs12:35:140
1989999160,1cyclictest0-21swapper/009:30:120
1989999160,15cyclictest706-21/usr/sbin/munin08:30:200
1989999160,15cyclictest30667-21ntpq12:10:170
1989999160,15cyclictest25275-21perf07:20:010
1989999160,15cyclictest13647-21cpuspeed_turbos09:50:130
1989999160,15cyclictest12743-21cpu11:40:140
1989999160,15cyclictest0-21swapper/012:20:160
1989999160,15cyclictest0-21swapper/010:50:120
1989999160,15cyclictest0-21swapper/010:45:130
1989999160,15cyclictest0-21swapper/010:10:150
1989999160,15cyclictest0-21swapper/008:50:180
1989999160,15cyclictest0-21swapper/008:15:150
1990899150,1cyclictest0-21swapper/212:15:132
1990899150,1cyclictest0-21swapper/212:15:132
1990899150,15cyclictest0-21swapper/209:05:202
19899991512,1cyclictest0-21swapper/010:04:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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