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2022-05-29 - 14:41

x86 Intel Xeon E3-1220 @3100 MHz, Linux 4.19.8-rt6 (Profile)

Latency plot of system in rack #1, slot #0
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
Characteristics of the 10 highest latencies:
System rack1slot0.osadl.org (updated Sun May 29, 2022 12:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
157302890,0sleep00-21swapper/010:26:150
201082880,0sleep10-21swapper/112:29:061
158272850,0sleep20-21swapper/210:31:402
319492620,0sleep20-21swapper/209:22:222
219822610,0sleep30-21swapper/310:05:013
281042600,1sleep2820-21dbus-daemon11:54:172
25912600,1sleep02584-21sshd12:13:580
161472590,0sleep20-21swapper/210:26:162
310152570,0sleep10-21swapper/109:22:161
252412570,0sleep00-21swapper/010:07:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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