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2022-05-25 - 20:41

x86 Intel Xeon E3-1220 @3100 MHz, Linux 4.19.1-rt3 (Profile)

Latency plot of system in rack #2, 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 rack2slot0.osadl.org (updated Wed May 25, 2022 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
49792930,0sleep24980-21sshd10:33:362
219822570,0sleep20-21swapper/211:41:382
26612550,0sleep00-21swapper/009:13:000
63102540,1sleep36312-21bash10:01:503
258992520,0sleep00-21swapper/012:22:440
99862510,0sleep30-21swapper/312:10:373
60662510,0sleep30-21swapper/309:37:513
157032490,0sleep20-21swapper/208:50:202
282332420,0sleep00-21swapper/011:11:070
507223725,7sleep20-21swapper/207:09:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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