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2026-04-16 - 08:07
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackbslot7.osadl.org (updated Thu Apr 16, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2544322280,19sleep10-21swapper/118:59:361
265569910284,11cyclictest14528-21/usr/sbin/munin00:08:371
265569910284,11cyclictest14528-21/usr/sbin/munin00:08:371
26554999543,42cyclictest2115-21latency_hist21:58:090
26554999543,42cyclictest2115-21latency_hist21:58:090
26556999043,16cyclictest8468-21latency_hist23:03:091
257062899,55sleep025730-21proc_pri18:59:480
26560998866,15cyclictest26542-21cyclictest23:03:092
26560998864,13cyclictest0-21swapper/220:33:262
26556998763,17cyclictest352-21runrttasks22:33:301
26556998763,17cyclictest352-21runrttasks22:33:301
26554998768,13cyclictest277-21dbus-daemon19:08:070
26560998659,7cyclictest181rcu_preempt20:55:252
26560998659,7cyclictest181rcu_preempt20:55:252
26560998648,10cyclictest181rcu_preempt20:43:052
2655699869,46cyclictest31-21ksoftirqd/121:36:011
26556998649,8cyclictest181rcu_preempt20:28:391
26556998615,42cyclictest31-21ksoftirqd/121:42:091
26556998615,42cyclictest31-21ksoftirqd/121:42:091
2655699856,43cyclictest31-21ksoftirqd/119:35:581
2655699856,43cyclictest31-21ksoftirqd/119:35:581
26556998551,29cyclictest3453-21kworker/u19:3+events_unbound21:13:061
2655699853,59cyclictest29002-21apt-get19:09:091
2655699853,59cyclictest29002-21apt-get19:09:091
26554998569,10cyclictest2067-21munin-run22:53:050
26554998563,16cyclictest544-21cron19:43:050
26560998461,11cyclictest0-21swapper/222:13:092
26556998441,15cyclictest3030-21cpu19:28:221
26556998441,15cyclictest3030-21cpu19:28:221
26554998436,19cyclictest14749-21ssh00:08:240
26554998436,19cyclictest14749-21ssh00:08:240
26554998338,22cyclictest14909-21ssh23:13:310
26554998338,22cyclictest14909-21ssh23:13:310
26554998328,21cyclictest0-21swapper/022:35:470
26554998328,21cyclictest0-21swapper/022:35:470
26560998263,10cyclictest0-21swapper/223:28:262
2656099822,54cyclictest29002-21apt-get19:09:082
2656099822,54cyclictest29002-21apt-get19:09:082
26556998261,14cyclictest26542-21cyclictest19:08:071
26556998256,7cyclictest181rcu_preempt19:38:341
26556998245,7cyclictest181rcu_preempt23:56:421
26556998244,7cyclictest0-21swapper/123:47:501
26556998219,31cyclictest31-21ksoftirqd/122:09:261
26554998229,22cyclictest18060-21ssh23:18:360
26554998229,16cyclictest14639-21ssh22:18:320
26554998222,20cyclictest4663-21ssh23:51:050
26560998163,9cyclictest0-21swapper/219:18:232
26560998161,10cyclictest0-21swapper/223:48:212
26560998144,11cyclictest181rcu_preempt19:07:312
26556998160,14cyclictest5080-21apt-key22:58:071
26556998157,16cyclictest14581-21ssh23:13:221
26556998157,16cyclictest14581-21ssh23:13:221
26556998154,8cyclictest181rcu_preempt23:58:241
26556998147,9cyclictest181rcu_preempt20:22:301
26556998147,9cyclictest181rcu_preempt20:22:301
26556998145,8cyclictest181rcu_preempt23:23:411
26556998145,8cyclictest181rcu_preempt23:23:411
26556998142,12cyclictest0-21swapper/121:54:041
26556998142,12cyclictest0-21swapper/121:54:041
26554998158,16cyclictest846-21grep23:43:430
26554998128,24cyclictest1898-21ssh21:03:250
26560998063,11cyclictest2952-21systemd-journal22:47:482
26560998063,11cyclictest2952-21systemd-journal22:47:482
26560998062,9cyclictest0-21swapper/222:33:092
26560998061,10cyclictest0-21swapper/222:53:422
26560998010,39cyclictest39-21ksoftirqd/200:22:092
26556998058,15cyclictest26542-21cyclictest20:53:081
26556998056,8cyclictest181rcu_preempt23:48:291
26556998041,12cyclictest2908-21ssh21:05:091
26556998040,7cyclictest181rcu_preempt20:04:581
26556998026,7cyclictest0-21swapper/122:51:161
26554998065,9cyclictest17186-21ssh22:23:230
26554998056,18cyclictest2631-21fschecks_count22:53:280
26554998029,23cyclictest20689-21ssh00:18:240
26554998029,22cyclictest28398-21ssh22:42:290
26554998027,23cyclictest30062-21ssh23:38:390
26554998025,46cyclictest0-21swapper/021:03:070
2655499800,38cyclictest18154-21ssh21:29:180
2655499800,38cyclictest18154-21ssh21:29:180
26560997963,9cyclictest0-21swapper/222:03:302
26560997958,13cyclictest0-21swapper/223:08:312
26556997960,13cyclictest19676-21snmpd23:33:211
26556997956,15cyclictest31849-21kworker/u17:1+ext4-rsv-conversion20:09:231
26556997949,15cyclictest181rcu_preempt22:15:311
26556997949,15cyclictest181rcu_preempt22:15:311
26556997944,11cyclictest3177-21timerwakeupswit21:58:421
26556997942,8cyclictest0-21swapper/122:23:311
26556997911,37cyclictest31-21ksoftirqd/121:46:401
26554997954,17cyclictest0-21swapper/022:03:190
26554997934,37cyclictest29163-21ssh00:33:080
26554997928,17cyclictest13038-21ssh23:09:560
26554997925,24cyclictest20549-21ssh22:28:320
26554997925,23cyclictest8475-21ssh21:13:330
26554997919,32cyclictest0-21swapper/021:26:140
2564027913,45sleep30-21swapper/318:59:433
26560997849,7cyclictest181rcu_preempt23:56:592
26560997848,8cyclictest181rcu_preempt00:25:422
26560997815,38cyclictest39-21ksoftirqd/220:28:172
26560997814,34cyclictest39-21ksoftirqd/221:44:092
26556997861,11cyclictest28882-21latency_hist20:48:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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