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2021-07-26 - 19:15

Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz, Linux 5.9.0-rc2-rt1 (Profile)

Latency plot of system in rack #4, slot #6
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 -h200 -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 rack4slot6.osadl.org (updated Mon Jul 26, 2021 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14433521400,129pltrace0-21swapper/507:09:185
14433521350,131pltrace0-21swapper/107:07:271
2368521250,0sleep20-21swapper/207:20:152
1671129590,3sleep30-21swapper/307:09:033
1611052820,0pltrace0-21swapper/509:40:055
1659927867,7sleep20-21swapper/207:07:262
1666827655,7sleep60-21swapper/607:08:266
2898352740,1pltrace0-21swapper/207:30:052
1656627261,7sleep70-21swapper/707:06:597
1444227056,10sleep00-21swapper/007:05:080
1286552700,0pltrace0-21swapper/311:40:063
1650726756,7sleep40-21swapper/407:06:084
57912630,0sleep50-21swapper/507:45:175
251752620,0pltrace0-21swapper/708:40:057
1621952330,1pltrace16223-21tail09:05:052
142052240,1pltrace1424-21tail09:25:050
241382220,4sleep61697999cyclictest11:20:126
16979992018,1cyclictest0-21swapper/611:25:206
251752180,0pltrace0-21swapper/008:45:050
176712180,0sleep40-21swapper/408:05:354
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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