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2022-05-29 - 14:28

x86 Intel Core i7-3770 @3400 MHz, Linux 3.18.69-rt75 (Profile)

Latency plot of system in rack #8, slot #5
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
Characteristics of the 10 highest latencies:
System rack8slot5.osadl.org (updated Sun May 29, 2022 12:43:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2478327554,8sleep60-21swapper/605:26:366
2476327453,8sleep50-21swapper/505:26:195
2474227251,8sleep40-21swapper/405:26:024
2456827139,17sleep70-21swapper/705:23:337
2464426529,13sleep00-21swapper/005:24:380
2384025130,17sleep10-21swapper/105:21:591
2452124938,8sleep20-21swapper/205:22:562
2455424828,7sleep30-21swapper/305:23:213
24906991714,2cyclictest0-21swapper/508:14:595
2490999150,14cyclictest0-21swapper/710:53:467
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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