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2022-07-01 - 01:18

x86 Intel Core i5-750 @2667 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #8, slot #3
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 rack8slot3.osadl.org (updated Thu Jun 30, 2022 12:45:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
175002183164,15sleep10-21swapper/107:09:071
171942182108,69sleep30-21swapper/307:05:403
173772176157,15sleep20-21swapper/207:07:482
157472167105,58sleep00-21swapper/007:05:050
62762930,6sleep31782999cyclictest08:00:113
256842900,1sleep00-21swapper/010:50:000
62372880,3sleep20-21swapper/211:40:162
42982880,7sleep30-21swapper/310:25:123
148622870,6sleep30-21swapper/308:20:143
1782899397,31cyclictest0-21swapper/209:50:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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