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2022-05-26 - 19:31

x86 Intel Atom Z530 @1600 MHz, Linux 3.12.61-rt81 (Profile)

Latency plot of system in rack #1, slot #8
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rack1slot8.osadl.org (updated Thu May 26, 2022 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9827276123,731sleep00-21swapper/007:06:060
10260995387,13cyclictest0-21swapper/007:10:050
1026099495419,48cyclictest0-21swapper/009:13:220
1026199434375,51cyclictest0-21swapper/107:10:061
1026199410335,45cyclictest0-21swapper/109:13:211
2219521200,5sleep1271ktimersoftd/109:16:211
2119991000,4rtkit-daemon2118-21rtkit-daemon10:54:481
211999890,16rtkit-daemon2118-21rtkit-daemon10:09:281
211999880,4rtkit-daemon2118-21rtkit-daemon10:52:430
211999860,4rtkit-daemon2118-21rtkit-daemon11:43:201
211999840,4rtkit-daemon2118-21rtkit-daemon10:24:590
211999840,4rtkit-daemon2118-21rtkit-daemon10:06:230
211999840,4rtkit-daemon2118-21rtkit-daemon08:40:171
211999810,4rtkit-daemon2118-21rtkit-daemon11:35:301
211999810,4rtkit-daemon2118-21rtkit-daemon10:30:381
211999800,5rtkit-daemon2118-21rtkit-daemon12:23:061
211999790,5rtkit-daemon2118-21rtkit-daemon12:20:001
211999790,4rtkit-daemon2118-21rtkit-daemon12:30:260
211999790,4rtkit-daemon2118-21rtkit-daemon10:40:481
211999780,4rtkit-daemon2118-21rtkit-daemon12:30:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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