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2026-04-17 - 23:57
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7.osadl.org (updated Fri Apr 17, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
217409912154,60cyclictest30342-21systemctl10:53:000
217409912154,60cyclictest30342-21systemctl10:53:000
217409912057,57cyclictest19861-21cpu11:28:160
217409911939,10cyclictest0-21swapper/011:53:180
217409911372,26cyclictest30892-21ssh10:53:180
21740991102,41cyclictest18454-21latency_hist10:33:020
21740991102,41cyclictest18454-21latency_hist10:33:020
21740991102,30cyclictest21169-21ssh12:23:340
21740991094,39cyclictest352-21runrttasks12:17:000
217409910816,41cyclictest8731-21kworker/u17:2+rpciod09:23:330
21740991073,53cyclictest1307-21apt-config07:38:040
21740991073,53cyclictest1307-21apt-config07:38:040
21740991072,27cyclictest4652-21cpu11:03:150
21740991072,27cyclictest4652-21cpu11:03:150
21740991063,42cyclictest23502-21munin-node07:08:120
217409910539,11cyclictest0-21swapper/007:28:160
21740991043,44cyclictest5477-21ls11:58:150
21740991042,44cyclictest13595-21ssh09:30:000
21740991034,34cyclictest22399-21ntp_kernel_err07:03:270
21740991033,37cyclictest22952-21grep08:44:060
21740991033,37cyclictest22952-21grep08:44:060
21740991014,29cyclictest17876-21ls09:38:030
21740991014,29cyclictest17876-21ls09:38:030
217409910119,28cyclictest4488-21latency_hist07:48:020
21572210114,61sleep221587-21modprobe07:03:002
2175399993,80cyclictest10902-21chrt11:13:173
2175399993,80cyclictest10902-21chrt11:13:173
2174799993,82cyclictest1432-21apt-get07:38:172
2174799993,82cyclictest1432-21apt-get07:38:172
2174099994,38cyclictest9243-21latency_hist08:03:020
21740999657,32cyclictest11472-21kernelversion11:13:590
21740999657,32cyclictest11472-21kernelversion11:13:590
2174799953,69cyclictest10281-21apt-get11:13:162
2174799953,69cyclictest10281-21apt-get11:13:162
2174599913,29cyclictest21891-21/usr/sbin/munin07:03:311
2174099913,67cyclictest1072-21apt-get10:58:140
2174099913,36cyclictest3217-21ssh09:13:450
21747999060,22cyclictest24334-21fschecks_time09:48:242
21747999060,22cyclictest24334-21fschecks_time09:48:242
21747998943,18cyclictest181rcu_preempt11:38:262
21747998943,18cyclictest181rcu_preempt11:38:262
21745998947,35cyclictest0-21swapper/108:53:361
21740998954,26cyclictest18187-21ssh09:38:180
21747998863,8cyclictest181rcu_preempt09:20:582
2174799883,48cyclictest39-21ksoftirqd/210:52:302
2174799883,48cyclictest39-21ksoftirqd/210:52:302
21745998851,32cyclictest21731-21cyclictest10:27:561
21745998844,36cyclictest2374-21systemd-journal09:29:121
21745998835,42cyclictest0-21swapper/111:18:251
2174599882,39cyclictest1509-21apt-get10:58:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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