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2021-09-27 - 06:02

Intel(R) Atom(TM) CPU Z530 @ 1.60GHz, 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 Mon Sep 27, 2021 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
314899961840,51cyclictest0-21swapper/019:11:070
314999922798,55cyclictest0-21swapper/119:11:071
27442707683,17sleep00-21swapper/019:06:220
28622592572,13sleep10-21swapper/119:07:321
314899394312,45cyclictest10911-21df21:10:160
314999324260,46cyclictest10910-21ssh21:10:161
2571421060,15sleep00-21swapper/000:15:140
211999960,10rtkit-daemon0-21swapper/023:01:220
211999890,4rtkit-daemon2118-21rtkit-daemon21:43:360
211999840,4rtkit-daemon2118-21rtkit-daemon19:39:440
211999820,4rtkit-daemon2118-21rtkit-daemon20:29:040
211999800,3rtkit-daemon21021-21ssh00:06:290
211999790,3rtkit-daemon2118-21rtkit-daemon20:30:290
211999780,4rtkit-daemon2118-21rtkit-daemon21:39:310
211999760,4rtkit-daemon2118-21rtkit-daemon23:23:281
211999760,4rtkit-daemon2118-21rtkit-daemon21:18:051
211999760,4rtkit-daemon2118-21rtkit-daemon00:20:240
48172750,13sleep1314999cyclictest21:53:501
211999740,4rtkit-daemon2118-21rtkit-daemon23:07:480
211999740,4rtkit-daemon2118-21rtkit-daemon22:49:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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