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2023-06-05 - 01:22

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 Sun Jun 04, 2023 12:43:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2438299798734,48cyclictest0-21swapper/108:00:291
2438199785723,50cyclictest0-21swapper/008:00:290
239302762741,13sleep10-21swapper/107:05:531
2438299508429,47cyclictest0-21swapper/107:12:111
2438199498420,51cyclictest0-21swapper/007:12:110
240032397373,17sleep00-21swapper/007:06:340
72782870,3sleep00-21swapper/009:21:440
211999760,4rtkit-daemon2118-21rtkit-daemon11:41:040
211999710,5rtkit-daemon2118-21rtkit-daemon11:17:230
24381996513,44cyclictest0-21swapper/012:00:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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