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2022-05-25 - 21:00

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 10 highest latencies:
System rack1slot8.osadl.org (updated Wed May 25, 2022 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2925899998922,39cyclictest22657-21devkit-disks-da07:11:220
2925899998922,39cyclictest22657-21devkit-disks-da07:11:220
291472910887,16sleep10-21swapper/107:09:171
2925999897853,29cyclictest0-21swapper/107:11:221
2925999897853,29cyclictest0-21swapper/107:11:221
2925899862784,38cyclictest1254-21ssh10:54:380
2925999758715,28cyclictest0-21swapper/110:54:381
289642677653,16sleep00-21swapper/007:07:250
2119991260,5rtkit-daemon2118-21rtkit-daemon09:24:110
2119991130,5rtkit-daemon2118-21rtkit-daemon10:21:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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