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2021-10-24 - 02:23

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 Sun Oct 24, 2021 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14705521310,127pltrace0-21swapper/119:05:261
14705521260,116pltrace0-21swapper/519:06:545
1374752860,1pltrace13752-21pltrace-run21:00:017
1686628056,7sleep60-21swapper/619:07:196
3199352740,0pltrace0-21swapper/219:35:012
534652730,0pltrace0-21swapper/000:00:020
3245652720,0pltrace0-21swapper/020:35:010
1698327160,7sleep20-21swapper/219:09:002
1681327160,7sleep70-21swapper/719:06:327
1678627160,7sleep00-21swapper/019:06:090
1432426744,7sleep40-21swapper/419:05:014
95172660,0sleep50-21swapper/521:30:175
1632626647,13sleep30-21swapper/319:05:243
2659952560,0pltrace0-21swapper/200:20:022
17258992310,12cyclictest0-21swapper/623:35:246
1725899220,21cyclictest0-21swapper/622:25:286
587052210,0pltrace0-21swapper/723:30:027
296882200,0sleep40-21swapper/423:20:314
319272190,1sleep10-21swapper/122:21:561
279052190,1pltrace43-21ksoftirqd/520:42:135
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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