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2023-05-31 - 11:48

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 May 31, 2023 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19704211413,66sleep319719-21systemd-run19:06:413
19704211413,66sleep319719-21systemd-run19:06:413
1892021137,77sleep10-21swapper/119:02:241
1892021137,77sleep10-21swapper/119:02:241
19791991019,53cyclictest7874-21sh21:30:020
1979199951,66cyclictest21061-21rm22:51:360
19791999313,49cyclictest26780-21diskmemload23:45:210
1979199902,58cyclictest10325-21ssh23:28:090
1979199902,58cyclictest10325-21ssh23:28:090
1979199893,59cyclictest11518-21ssh22:33:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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