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2022-11-30 - 03:59

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #0, slot #7
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
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rack0slot7.osadl.org (updated Wed Nov 30, 2022 00:45:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34241112192170,13sleep110-21swapper/1119:06:523
34241102189183,3sleep100-21swapper/1019:06:512
34241932188167,9sleep150-21swapper/1519:07:467
34240582161141,10sleep50-21swapper/519:06:3011
34239542161141,10sleep90-21swapper/919:05:4615
34243342156136,11sleep30-21swapper/319:09:269
34238132156150,2sleep20-21swapper/219:05:408
34241222155138,8sleep40-21swapper/419:07:0110
34242762152132,10sleep120-21swapper/1219:08:464
34239592140110,28sleep140-21swapper/1419:05:516
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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