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2026-03-23 - 03:15
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Mon Mar 23, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10627214816,92sleep110654-21apt-config19:04:461
10627214816,92sleep110654-21apt-config19:04:461
10798991402,106cyclictest8586-21apt-get22:35:101
10798991402,106cyclictest8586-21apt-get22:35:101
10798991233,86cyclictest12019-21apt-get23:34:591
107989910273,13cyclictest181rcu_preempt23:14:451
10798991013,65cyclictest21657-21apt-get19:35:051
10798999647,10cyclictest181rcu_preempt22:29:571
10798999647,10cyclictest181rcu_preempt22:29:571
10801999523,25cyclictest39-21ksoftirqd/200:25:242
10798999334,26cyclictest10756-21cyclictest23:59:111
10801999214,49cyclictest39-21ksoftirqd/219:45:572
10801999214,49cyclictest39-21ksoftirqd/219:45:572
10798999274,10cyclictest10248-21ssh21:43:241
1079899913,64cyclictest29380-21kworker/u18:0+ext4-rsv-conversion20:45:261
1079899913,64cyclictest29380-21kworker/u18:0+ext4-rsv-conversion20:45:261
1080699903,51cyclictest0-21swapper/323:35:083
10798999038,13cyclictest181rcu_preempt00:25:131
1079899903,61cyclictest23612-21ssh23:54:421
10801998923,25cyclictest39-21ksoftirqd/222:24:512
10801998849,11cyclictest181rcu_preempt22:58:402
10801998828,23cyclictest39-21ksoftirqd/222:10:162
10785998814,30cyclictest28289-21apt-get21:19:520
10798998746,13cyclictest181rcu_preempt23:29:441
10798998739,14cyclictest25699-21ssh23:03:381
10798998739,14cyclictest25699-21ssh23:03:381
10785998723,24cyclictest32008-1kworker/0:1H+mmc_complete00:19:450
1079899862,54cyclictest11072-21seq19:05:081
10785998518,37cyclictest0-21swapper/022:50:480
10785998518,37cyclictest0-21swapper/022:50:480
10801998463,14cyclictest19476-21sh21:05:022
10801998440,21cyclictest8989-21diskstats23:30:012
10801998430,26cyclictest39-21ksoftirqd/200:18:042
10801998430,26cyclictest39-21ksoftirqd/200:18:042
10798998463,14cyclictest29250-21timerwakeupswit21:20:181
10798998445,12cyclictest181rcu_preempt21:25:111
10785998425,48cyclictest0-21swapper/022:04:560
10798998348,14cyclictest181rcu_preempt19:14:451
10798998328,30cyclictest0-21swapper/121:59:451
10798998328,30cyclictest0-21swapper/121:59:451
10785998329,20cyclictest0-21swapper/000:25:040
10785998317,29cyclictest7427-21apt-get20:29:520
10785998311,26cyclictest8082-21true22:34:430
10785998311,26cyclictest8082-21true22:34:430
10798998254,15cyclictest181rcu_preempt19:49:451
10798998254,15cyclictest181rcu_preempt19:49:451
10785998263,13cyclictest8925-21kworker/u17:4+nfsiod00:31:280
10785998218,41cyclictest0-21swapper/022:42:120
10801998144,8cyclictest181rcu_preempt23:59:582
10801998126,29cyclictest39-21ksoftirqd/223:41:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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