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2026-04-13 - 11:27
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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 20 highest latencies:
System rack3slot6.osadl.org (updated Mon Apr 13, 2026 00:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12315998467,10cyclictest14-21ksoftirqd/021:35:240
12315998111,62cyclictest0-21swapper/023:35:120
1231599787,20cyclictest0-21swapper/021:25:020
12315997860,10cyclictest14-21ksoftirqd/023:25:120
12315997761,11cyclictest12406-21latency_hist19:10:020
12315997749,13cyclictest14-21ksoftirqd/020:35:140
12315997627,42cyclictest0-21swapper/023:40:130
12315997615,19cyclictest0-21swapper/019:45:150
1202427516,50sleep00-21swapper/019:08:540
1202427516,50sleep00-21swapper/019:08:540
12317997415,18cyclictest14257-21cron19:15:001
12315997248,14cyclictest14-21ksoftirqd/020:30:150
12317997112,29cyclictest12930-21/usr/sbin/munin23:40:371
12315997111,23cyclictest24492-21apt-get21:15:130
12315997111,23cyclictest24492-21apt-get21:15:130
1231799707,23cyclictest26-21ksoftirqd/120:39:001
12317997017,15cyclictest26-21ksoftirqd/122:36:521
12315997041,17cyclictest14-21ksoftirqd/019:55:130
12315997038,18cyclictest0-21swapper/019:30:120
149582690,7sleep1251rcuc/120:45:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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