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2022-07-01 - 00:30

x86 Intel Celeron N3350 @1100 MHz, Linux 5.10.90-rt60 (Profile)

Latency plot of system in rack #c, slot #4
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 rackcslot4.osadl.org (updated Thu Jun 30, 2022 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35619892282238,29sleep00-21swapper/007:07:120
35619472245202,27sleep10-21swapper/107:06:451
35774042620,1chrt3577405-21/usr/sbin/munin07:45:150
37648662570,2sleep00-21swapper/012:30:020
36377452510,9sleep126-21ksoftirqd/109:43:191
172099490,13rtkit-daemon0-21swapper/110:16:491
36759382470,3sleep00-21swapper/010:32:230
36691032430,1sleep10-21swapper/110:24:161
37706192390,3sleep00-21swapper/012:36:300
35720072390,4sleep00-21swapper/007:30:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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