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2025-12-10 - 08:31
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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 rack9slot2.osadl.org (updated Wed Dec 10, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
203162318245,61sleep30-21swapper/33
203232309272,25sleep00-21swapper/00
202792309240,37sleep20-21swapper/22
2050499272268,2cyclictest0-21swapper/22
202002245209,24sleep10-21swapper/11
2847321600,3sleep22050499cyclictest2
2050899154152,1cyclictest0-21swapper/33
2049899112107,3cyclictest0-21swapper/11
20493999592,2cyclictest3868-21strings0
199362580,1sleep00-21swapper/00
218252570,3sleep00-21swapper/00
99412480,1sleep00-21swapper/00
146622450,1sleep20-21swapper/22
67572420,3sleep30-21swapper/33
80532390,1sleep20-21swapper/22
263282390,1sleep20-21swapper/22
244322370,1sleep20-21swapper/22
254462332,2sleep2111rcu_preempt2
20508993010,4cyclictest35-21ksoftirqd/33
173452300,2sleep017352-21gltestperf0
20508992913,4cyclictest35-21ksoftirqd/33
20508992911,4cyclictest35-21ksoftirqd/33
20498992922,4cyclictest29133-21grep1
183732290,6sleep091ksoftirqd/00
183732290,6sleep091ksoftirqd/00
2050899288,4cyclictest35-21ksoftirqd/33
2050899288,3cyclictest35-21ksoftirqd/33
20508992710,4cyclictest35-21ksoftirqd/33
2050899269,8cyclictest35-21ksoftirqd/33
2050899259,4cyclictest35-21ksoftirqd/33
2050899255,4cyclictest35-21ksoftirqd/33
2050899252,8cyclictest0-21swapper/33
2050899249,7cyclictest35-21ksoftirqd/33
2050899248,3cyclictest35-21ksoftirqd/33
20508992417,5cyclictest10333-21gdbus3
20504992411,10cyclictest29738-21awk2
20498992412,6cyclictest10463-21apt-get1
2049899240,11cyclictest263222gltestperf1
20493992411,10cyclictest4223-21switchtime0
59002230,2sleep10-21swapper/11
2050899236,4cyclictest35-21ksoftirqd/33
2050899235,4cyclictest35-21ksoftirqd/33
2050899235,2cyclictest111rcu_preempt3
2050899232,18cyclictest27606-21cat3
20508992316,4cyclictest16311-21dpkg3
20508992316,4cyclictest16311-21dpkg3
20508992310,4cyclictest35-21ksoftirqd/33
2050499234,4cyclictest17059-21awk2
2050499231,20cyclictest10333-21gdbus2
2050899226,4cyclictest35-21ksoftirqd/33
2050899225,8cyclictest111rcu_preempt3
2050899223,6cyclictest35-21ksoftirqd/33
20508992218,3cyclictest35-21ksoftirqd/33
2050899221,6cyclictest0-21swapper/33
2050499224,16cyclictest10255-21cat2
2050499223,17cyclictest8962-21cat2
2050499221,4cyclictest6905-21munin-run2
2050499221,18cyclictest231292chrt2
20504992210,9cyclictest28597-21timerwakeupswit2
20498992215,4cyclictest8060-21grep1
20498992211,7cyclictest5139-21apt-get1
20493992216,3cyclictest23776-21sh0
2050899213,5cyclictest0-21swapper/33
20508992118,2cyclictest341rcuc/33
2050899211,6cyclictest35-21ksoftirqd/33
20508992116,3cyclictest35-21ksoftirqd/33
20508992116,3cyclictest35-21ksoftirqd/33
20508992112,2cyclictest35-21ksoftirqd/33
2050899210,8cyclictest35-21ksoftirqd/33
2050899210,8cyclictest35-21ksoftirqd/33
2050899210,4cyclictest35-21ksoftirqd/33
2050499212,17cyclictest19361-21latency_hist2
2050499212,17cyclictest19361-21latency_hist2
2050499212,17cyclictest14995-21awk2
20504992115,4cyclictest21392-21cut2
20504992115,4cyclictest1079-21diskstats2
20504992115,3cyclictest29498-21gltestperf2
2050499211,4cyclictest11188-21latency_hist2
20504992114,4cyclictest14264-21sh2
2050499211,3cyclictest14761-1kworker/2:2H2
2050499211,3cyclictest14761-1kworker/2:2H2
2050499211,17cyclictest17269-21df_inode2
2050499211,17cyclictest1653-1kworker/2:1H2
2050499210,3cyclictest27815-21munin-run2
20498992116,3cyclictest27669-21irqstats1
20498992115,3cyclictest21-21ksoftirqd/11
20498992113,5cyclictest665-21runrttasks1
20493992116,3cyclictest13527-21kernelversion0
20493992115,4cyclictest5809-21seq0
20493992114,4cyclictest15096-21ls0
20493992114,4cyclictest12489-21apt-get0
220342200,3sleep121-21ksoftirqd/11
2050899209,3cyclictest111rcu_preempt3
2050899209,2cyclictest111rcu_preempt3
2050899206,4cyclictest35-21ksoftirqd/33
2050899206,4cyclictest35-21ksoftirqd/33
2050899204,4cyclictest35-21ksoftirqd/33
2050899203,6cyclictest35-21ksoftirqd/33
2050899202,6cyclictest35-21ksoftirqd/33
2050899201,6cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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