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2026-04-21 - 07:19
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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 Tue Apr 21, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2127821099,70sleep121322-21/usr/sbin/munin18:58:281
22188999651,23cyclictest13346-21ssh22:23:142
22188999411,43cyclictest39-21ksoftirqd/219:18:342
22179999431,28cyclictest0-21swapper/023:00:160
2218899912,64cyclictest1555-21kworker/u18:2+ext4-rsv-conversion22:58:322
22188999111,39cyclictest39-21ksoftirqd/223:22:042
22188999111,39cyclictest39-21ksoftirqd/223:22:042
208672919,54sleep220946-21fschecks_time18:58:132
2218899902,40cyclictest39-21ksoftirqd/221:50:332
22188998921,34cyclictest39-21ksoftirqd/223:49:482
22188998816,39cyclictest39-21ksoftirqd/219:13:072
22188998816,39cyclictest39-21ksoftirqd/219:13:072
22184998868,13cyclictest18082-21/usr/sbin/munin21:38:141
22188998669,12cyclictest22167-21cyclictest20:13:232
22188998669,12cyclictest22167-21cyclictest20:13:232
22184998619,27cyclictest352-21runrttasks19:53:051
2219599844,50cyclictest0-21swapper/322:58:173
22188998319,38cyclictest39-21ksoftirqd/220:27:392
22188998319,38cyclictest39-21ksoftirqd/220:27:392
22188998314,42cyclictest39-21ksoftirqd/220:48:542
2217999831,26cyclictest19468-21kworker/u17:1+rpciod21:27:270
22188998264,13cyclictest330-21sh22:56:052
22188998264,13cyclictest330-21sh22:56:052
22188998249,23cyclictest19590-21idleruntime-cro20:32:452
22188998221,34cyclictest39-21ksoftirqd/219:44:502
22188998221,34cyclictest39-21ksoftirqd/219:44:502
22188998217,36cyclictest39-21ksoftirqd/222:11:122
22188998216,34cyclictest39-21ksoftirqd/223:54:592
22179998213,27cyclictest27917-21ssh23:42:210
22188998166,8cyclictest0-21swapper/223:08:032
22188998151,8cyclictest181rcu_preempt20:43:212
22188998020,19cyclictest0-21swapper/200:13:142
22179998046,25cyclictest23281-21tune2fs20:43:050
22179998043,31cyclictest14441-21ssh23:18:230
22179998043,31cyclictest14441-21ssh23:18:230
22188997961,12cyclictest29918-21sh22:51:272
22188997956,16cyclictest544-21cron19:52:502
22188997948,9cyclictest181rcu_preempt00:23:212
22188997920,34cyclictest39-21ksoftirqd/222:36:452
22179997914,27cyclictest19516-21ssh21:39:150
22179997912,23cyclictest30226-21xargs19:23:200
22188997857,15cyclictest23926-21latency_hist19:07:502
22188997848,11cyclictest181rcu_preempt23:23:112
22188997816,34cyclictest39-21ksoftirqd/219:36:532
22184997822,25cyclictest24359-21seq20:46:591
22179997827,41cyclictest22346-21apt-get19:02:570
22179997814,20cyclictest5654-21ssh21:17:180
22179997814,20cyclictest5654-21ssh21:17:180
22179997813,26cyclictest812-21rm23:50:350
22179997813,21cyclictest1838-21ssh21:10:020
22179997812,27cyclictest16507-21ssh00:17:270
22179997811,26cyclictest28927-21ssh22:48:400
22188997731,28cyclictest8973-21latency19:58:122
22188997731,19cyclictest0-21swapper/221:22:492
22188997728,21cyclictest0-21swapper/222:37:492
22188997728,21cyclictest0-21swapper/222:37:492
22188997717,31cyclictest39-21ksoftirqd/223:04:132
22184997723,25cyclictest27264-21seq21:53:041
22184997723,25cyclictest27264-21seq21:53:041
22179997759,13cyclictest20562-21sh00:23:160
22179997712,42cyclictest23317-21expr23:33:210
22179997712,28cyclictest27073-21seq22:46:510
22179997711,34cyclictest31526-21seq21:05:380
22179997711,34cyclictest31526-21seq21:05:380
2219599763,43cyclictest0-21swapper/319:13:583
2219599763,43cyclictest0-21swapper/319:13:583
22188997658,12cyclictest10158-21/usr/sbin/munin20:03:212
22188997656,14cyclictest25872-21apt-key19:12:482
22188997654,14cyclictest29882-21apt-key21:57:482
22188997654,14cyclictest29882-21apt-key21:57:482
22188997637,9cyclictest1930-21cpuspeed19:38:012
22188997637,9cyclictest1930-21cpuspeed19:38:012
22184997654,15cyclictest26598-21fschecks_time19:14:071
22184997654,15cyclictest26598-21fschecks_time19:14:071
22184997621,24cyclictest19319-21seq20:29:381
22184997621,24cyclictest17765-21seq20:25:161
22184997621,24cyclictest17765-21seq20:25:161
22179997613,23cyclictest30859-21rm23:47:140
22179997613,23cyclictest30859-21rm23:47:140
22179997612,25cyclictest6538-21ssh23:59:450
22179997612,25cyclictest6538-21ssh23:59:450
22179997612,23cyclictest5386-21ssh22:09:430
22179997611,27cyclictest7307-21ssh21:18:320
22179997611,27cyclictest23079-21ssh21:45:520
22179997611,27cyclictest23079-21ssh21:45:520
22188997556,12cyclictest22167-21cyclictest00:08:502
22188997539,13cyclictest181rcu_preempt00:18:202
22188997539,13cyclictest181rcu_preempt00:18:202
22188997538,21cyclictest8125-21df_inode00:03:052
22188997538,20cyclictest23718-21mailstats00:28:192
22188997538,20cyclictest23718-21mailstats00:28:192
22188997513,27cyclictest39-21ksoftirqd/221:16:122
22188997513,27cyclictest39-21ksoftirqd/221:16:122
22184997560,10cyclictest31933-21ntp_kernel_pll_23:48:121
22184997539,21cyclictest6243-21cpuspeed21:18:031
2217999759,22cyclictest19373-21seq20:30:190
22179997514,22cyclictest10436-21ssh00:07:190
22179997511,27cyclictest13592-21ssh21:29:260
22179997511,27cyclictest13592-21ssh21:29:260
22188997448,19cyclictest6384-21ssh21:18:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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