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2021-10-24 - 02:05

Intel(R) Atom(TM) CPU E3845 @ 1.91GHz, Linux 4.19.37-rt20 (Profile)

Latency plot of system in rack #b, slot #6
Data to construct the above plot have been generated using the RT test utility cyclictest.
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 rackbslot6.osadl.org (updated Fri Oct 15, 2021 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2742522130,2sleep20-21swapper/207:11:222
2457921500,5sleep02908199cyclictest09:50:280
998321390,4sleep02908199cyclictest07:41:130
911911080,4ptp4l401ktimersoftd/307:15:433
116692780,2sleep30-21swapper/311:46:463
273752710,1sleep10-21swapper/109:20:501
273752710,1sleep10-21swapper/109:20:501
221942690,2sleep10-21swapper/112:31:161
221942690,2sleep10-21swapper/112:31:161
310772620,5sleep12908299cyclictest08:25:541
116712600,1sleep00-21swapper/010:41:350
2908499585,9cyclictest12382-21apt-get09:36:543
2908499565,6cyclictest41-21ksoftirqd/309:21:103
29084995625,7cyclictest41-21ksoftirqd/307:45:523
2908499555,9cyclictest41-21ksoftirqd/309:41:313
29084995522,7cyclictest41-21ksoftirqd/311:31:363
29084995522,7cyclictest41-21ksoftirqd/309:48:243
286012554,40sleep00-21swapper/007:13:020
29084995421,10cyclictest41-21ksoftirqd/309:26:083
29084995420,8cyclictest41-21ksoftirqd/311:16:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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