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2023-02-08 - 04:34

ARM Freescale i.MX6 Quad @996 MHz, Linux 5.16.2-rt19 (Profile)

Latency plot of system in rack #b, 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 rackbslot7 (updated Wed Feb 08, 2023 00:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
165042990,4chrt16503-21ssh23:04:522
4532999858,33cyclictest30056-21unixbench_singl23:26:472
454299933,60cyclictest20708-21apt21:21:273
454299846,46cyclictest11887-21runrttasks22:01:283
453299834,14cyclictest19573-21latency_hist19:51:102
4532998261,11cyclictest30907-21munin-plugin-st20:26:082
4511998270,7cyclictest0-21swapper/020:01:270
36602827,36sleep33729-21find19:01:533
36602827,36sleep33729-21find19:01:533
4511998138,34cyclictest0-21swapper/022:01:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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