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2022-01-23 - 11:07

Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz, Linux 5.15.2-rt19 (Profile)

Latency plot of system in rack #0, slot #2
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 --smi
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 rack0slot2.osadl.org (updated Mon Jan 03, 2022 00:43:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
352689521380,4sleep552-21ksoftirqd/521:14:445
370808821350,1sleep60-21swapper/600:36:366
361513321340,1sleep10-21swapper/122:51:261
360028921280,2sleep03600290-21awk22:34:490
345745826652,10sleep30-21swapper/319:04:363
345958226248,10sleep40-21swapper/419:08:554
345938525541,10sleep20-21swapper/219:06:042
36111142540,1sleep4441rcuc/422:47:284
37091782530,1sleep20-21swapper/200:38:572
36545082530,4sleep338-21ksoftirqd/323:37:473
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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