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2026-09-08 - 17:57
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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 Tue Sep 08, 2026 12:45:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3213992827,1cyclictest0-21swapper/208:10:132
319399210,20cyclictest0-21swapper/109:30:011
321399200,1cyclictest0-21swapper/211:27:482
321399200,1cyclictest0-21swapper/211:27:472
319399204,9cyclictest15504-21munin-run11:20:011
3193992010,7cyclictest29607-21sendmail_mailqu10:45:201
321399193,15cyclictest0-21swapper/208:40:172
321399192,3cyclictest0-21swapper/209:55:362
3213991910,8cyclictest0-21swapper/210:55:162
319399192,16cyclictest11296-21cut08:20:161
319399192,15cyclictest0-21swapper/109:33:251
3193991917,1cyclictest0-21swapper/108:37:191
318999193,1cyclictest0-21swapper/011:36:190
318999192,2cyclictest31960-21needreboot10:50:180
3189991917,1cyclictest0-21swapper/007:38:540
3189991916,2cyclictest12992-21processes10:15:210
3189991914,2cyclictest3983-21H222:10:210
318999191,17cyclictest0-21swapper/010:49:400
318999190,3cyclictest4515-21cpuspeed_turbos11:00:150
318999190,1cyclictest26528-21nfsd408:45:190
321399182,15cyclictest291862sleep209:49:392
3213991815,2cyclictest7290-21gpgconf11:05:022
3213991815,2cyclictest3981-21H222:10:212
3213991815,2cyclictest3981-21H222:10:212
3213991815,2cyclictest24783-21df09:40:152
3213991815,2cyclictest23948-21cron11:35:012
3213991814,3cyclictest0-21swapper/210:06:092
321399180,3cyclictest2007-21systemd-journal12:03:132
321399180,2cyclictest3979-21H222:10:212
321399180,17cyclictest3981-21H222:10:212
319399182,15cyclictest3985-21H222:10:211
319399182,15cyclictest19083-21seq10:27:271
3193991815,2cyclictest17598-21ntp_offset11:20:181
3193991813,3cyclictest4473-21nfsd410:00:161
319399181,2cyclictest31395-21ntpq11:45:181
319399181,16cyclictest3991-21H222:10:211
319399180,2cyclictest4946-21nfsd407:10:181
319399180,17cyclictest3981-21H222:10:211
319399180,17cyclictest0-21swapper/107:35:161
319399180,16cyclictest0-21swapper/108:00:001
3189991816,1cyclictest9-21ksoftirqd/008:52:310
3189991816,1cyclictest9-21ksoftirqd/008:00:190
3189991816,1cyclictest0-21swapper/007:34:310
3189991815,2cyclictest7917-21cut07:15:200
3189991815,2cyclictest17162-21expr10:25:120
3189991814,3cyclictest27524-21cpuspeed_turbos11:40:150
318999181,16cyclictest1856-21systemd-udevd07:52:530
318999180,1cyclictest0-21swapper/008:35:130
318999180,15cyclictest3979-21H222:10:210
3213991715,1cyclictest28231-21latency11:40:172
3213991715,1cyclictest28-21ksoftirqd/208:57:322
3213991715,1cyclictest0-21swapper/209:20:182
3213991715,1cyclictest0-21swapper/208:25:142
3213991714,2cyclictest7794-21ntp_offset07:15:192
3213991714,2cyclictest4858-21ntp_kernel_pll_11:55:182
3213991714,2cyclictest3979-21H222:10:212
3213991714,2cyclictest32718-21/usr/sbin/munin11:50:122
3213991714,2cyclictest30949-21expr10:50:142
3213991714,2cyclictest27273-21awk12:35:182
3213991714,2cyclictest26857-21munin-run11:40:002
3213991714,2cyclictest25845-21latency_hist12:35:002
3213991714,2cyclictest20908-21cpuspeed_turbos07:40:152
3213991714,2cyclictest1-21systemd11:20:012
3213991714,2cyclictest0-21swapper/210:37:162
3213991714,2cyclictest0-21swapper/210:25:122
3213991714,2cyclictest0-21swapper/208:05:112
3213991714,1cyclictest0-21swapper/207:45:182
321399170,2cyclictest870-21systemd-logind11:11:522
321399170,2cyclictest27213-21missed_timers07:50:162
321399170,2cyclictest1829-21systemd-journal12:28:262
321399170,2cyclictest18113-21expr07:35:132
321399170,2cyclictest1424-21dpkg09:00:012
321399170,2cyclictest11104-21/usr/sbin/munin08:20:162
321399170,1cyclictest3991-21H222:10:212
321399170,16cyclictest31227-21nfsd411:45:192
321399170,16cyclictest29507-21nvmesmart_nvme008:50:182
321399170,16cyclictest27774-21cut08:50:002
321399170,16cyclictest19070-21timerandwakeup12:20:202
321399170,16cyclictest1761-21systemd12:06:522
321399170,16cyclictest10151-21lxd10:32:422
321399170,16cyclictest0-21swapper/209:52:112
321399170,15cyclictest3981-21H222:10:212
3193991715,1cyclictest0-21swapper/109:00:141
3193991714,2cyclictest863-21avahi-daemon12:25:021
3193991714,2cyclictest7580-21users08:10:221
3193991714,2cyclictest17769-21expr12:20:111
3193991714,2cyclictest15265-21latency08:25:181
3193991714,2cyclictest14596-21apache_volume12:15:101
3193991714,2cyclictest14500-21snapd09:10:101
3193991714,2cyclictest1377-21lxd11:56:431
3193991714,2cyclictest11701-21ntp_states11:10:181
319399171,15cyclictest30748-21chrt10:50:011
319399171,15cyclictest29137-21cat08:50:151
319399170,3cyclictest0-21swapper/109:35:571
319399170,2cyclictest8019-21chrt10:08:061
319399170,2cyclictest6410-21expr12:00:131
319399170,2cyclictest6302-21systemctl09:05:211
319399170,2cyclictest3985-21H222:10:211
319399170,2cyclictest3031-21date11:55:011
319399170,2cyclictest26994-21switchtime10:40:211
319399170,2cyclictest21225-21cron11:30:001
319399170,2cyclictest21225-21cron11:30:001
319399170,2cyclictest1613-21sendmail_mailqu09:55:201
319399170,1cyclictest0-21swapper/111:40:351
319399170,16cyclictest9178-21grep07:20:141
319399170,16cyclictest8809-21ntp_offset11:05:181
319399170,16cyclictest4035-21H222:10:211
319399170,16cyclictest399-20systemd-journal07:30:011
319399170,16cyclictest3987-21H222:10:211
319399170,16cyclictest27174-21grep07:50:161
319399170,16cyclictest26978-21ls12:35:171
319399170,16cyclictest21909-21cat11:30:131
319399170,16cyclictest14204-21perf07:30:011
319399170,16cyclictest10339-21ntp_kernel_pll_12:05:181
3189991715,1cyclictest15982-21switchtime10:20:190
3189991715,1cyclictest0-21swapper/010:00:120
3189991714,2cyclictest9784-21cut07:20:150
3189991714,2cyclictest3987-21H222:10:210
3189991714,2cyclictest3987-21H222:10:210
3189991714,2cyclictest3981-21H222:10:210
3189991714,2cyclictest3707-21master08:34:100
3189991714,2cyclictest31640-21taskset09:51:010
3189991714,2cyclictest24309-21kernelversion07:45:170
3189991713,3cyclictest1523-21lxd07:40:420
3189991712,4cyclictest0-21swapper/009:40:040
318999170,2cyclictest4099-21H222:10:210
318999170,2cyclictest399-20systemd-journal12:30:020
318999170,2cyclictest3991-21H222:10:210
318999170,2cyclictest27333-21expr09:45:140
318999170,2cyclictest21732-21grep12:25:170
318999170,2cyclictest17404-21grep12:20:110
318999170,2cyclictest15989-21ntp_states12:15:180
318999170,2cyclictest1516-21lxd11:32:430
318999170,1cyclictest0-21swapper/008:55:180
318999170,16cyclictest5785-21cron12:00:010
318999170,16cyclictest5345-21fschecks_count09:05:150
318999170,16cyclictest4115-21awk08:05:190
318999170,16cyclictest3987-21H222:10:210
318999170,16cyclictest3985-21H222:10:210
318999170,16cyclictest23424-21cat10:35:180
318999170,16cyclictest17486-21awk11:20:180
318999170,16cyclictest14550-21snapd08:27:300
318999170,16cyclictest11988-21if_err_lxdbr008:20:180
318999170,16cyclictest11524-21head09:15:190
318999170,16cyclictest11524-21head09:15:190
318999170,16cyclictest0-21swapper/010:55:130
3213991614,1cyclictest9137-21idleruntime08:15:152
3213991614,1cyclictest6017-21awk09:05:192
3213991614,1cyclictest3450-21gsd-color09:29:072
3213991614,1cyclictest13998-21latency11:15:162
3213991614,1cyclictest0-21swapper/210:15:162
3213991614,1cyclictest0-21swapper/207:15:012
321399160,1cyclictest0-21swapper/210:00:132
321399160,1cyclictest0-21swapper/208:35:192
321399160,1cyclictest0-21swapper/207:30:122
321399160,15cyclictest455-21plymouthd09:30:152
321399160,15cyclictest21453-21tr09:35:152
321399160,15cyclictest15798-21nfsd412:15:162
321399160,15cyclictest12344-21cstates07:25:132
321399160,15cyclictest12105-21cstates12:10:122
321399160,15cyclictest10231-21ps10:10:232
321399160,15cyclictest0-21swapper/211:00:162
321399160,15cyclictest0-21swapper/209:15:002
321399160,15cyclictest0-21swapper/207:55:152
321399160,15cyclictest0-21swapper/207:20:202
3193991614,1cyclictest0-21swapper/111:35:141
3193991614,1cyclictest0-21swapper/111:00:041
3193991614,1cyclictest0-21swapper/110:35:151
3193991614,1cyclictest0-21swapper/110:33:071
3193991614,1cyclictest0-21swapper/109:15:121
3193991614,1cyclictest0-21swapper/109:15:121
3193991614,1cyclictest0-21swapper/108:40:181
3193991614,1cyclictest0-21swapper/108:30:121
3193991614,1cyclictest0-21swapper/108:00:171
319399160,1cyclictest22124-21ps07:40:201
319399160,1cyclictest12116-21fschecks_count10:15:161
319399160,1cyclictest0-21swapper/109:40:141
319399160,15cyclictest9182-21expr10:10:171
319399160,15cyclictest27875-21ls09:45:181
319399160,15cyclictest23779-21df12:30:131
319399160,15cyclictest13733-21fschecks_count09:20:151
319399160,15cyclictest0-21swapper/108:45:141
319399160,15cyclictest0-21swapper/107:45:141
319399160,15cyclictest0-21swapper/107:15:141
3189991614,1cyclictest0-21swapper/012:05:130
3189991614,1cyclictest0-21swapper/011:10:100
3189991614,1cyclictest0-21swapper/009:25:220
3189991614,1cyclictest0-21swapper/008:10:140
3189991614,1cyclictest0-21swapper/007:25:130
3189991613,2cyclictest13281-21awk12:10:180
318999160,1cyclictest0-21swapper/010:40:130
318999160,15cyclictest9563-21cat10:10:200
318999160,15cyclictest3987-21H222:10:210
318999160,15cyclictest3979-21H222:10:210
318999160,15cyclictest32358-21find09:55:110
318999160,15cyclictest30914-21interrupts11:45:160
318999160,15cyclictest19006-21cat11:25:120
318999160,15cyclictest19006-21cat11:25:120
318999160,15cyclictest0-21swapper/012:35:110
318999160,15cyclictest0-21swapper/011:05:010
318999160,15cyclictest0-21swapper/009:20:150
318999160,15cyclictest0-21swapper/009:00:040
3193991514,1cyclictest0-21swapper/110:55:131
3189991514,1cyclictest0-21swapper/011:15:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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