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2023-02-06 - 14:23

x86 Intel Core i7-2600K @3400 MHz, 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 Feb 06, 2023 12:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1931421240,1sleep70-21swapper/712:37:497
16094521170,107pltrace0-21swapper/507:10:015
16094521140,103pltrace0-21swapper/107:09:571
13281521090,105pltrace0-21swapper/607:05:136
1609452950,80pltrace0-21swapper/207:08:492
1416952820,7pltrace1653999cyclictest09:42:015
1605027862,12sleep30-21swapper/307:06:403
1546452770,1pltrace15468-21pltrace-run11:27:020
1363052750,0pltrace0-21swapper/510:52:015
1363052750,0pltrace0-21swapper/510:52:015
286072740,0sleep30-21swapper/311:40:243
995552720,0pltrace0-21swapper/707:52:007
1853652720,0pltrace0-21swapper/510:57:015
1853652720,0pltrace0-21swapper/510:57:015
2341952670,1pltrace0-21swapper/709:12:007
8392650,0sleep40-21swapper/407:35:254
1602726549,12sleep00-21swapper/007:06:210
695152640,0pltrace0-21swapper/110:12:001
89582630,0sleep50-21swapper/508:50:015
1625826144,12sleep70-21swapper/707:09:177
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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