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2023-06-09 - 01:02

x86 Intel Xeon E3-1220L V2 @2300 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #a, 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 rackaslot0.osadl.org (updated Thu Jun 08, 2023 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
104652920,1sleep01540799cyclictest10:57:480
50742910,0sleep08118-21diskmemload12:11:510
250192780,1sleep11540999cyclictest10:59:011
189122610,4sleep00-21swapper/010:45:060
269802600,1sleep326948-21sshd09:20:403
151482600,0sleep00-21swapper/011:38:060
46542590,1sleep20-21swapper/209:50:472
327432590,1sleep0820-40kipmi012:35:300
29892580,1sleep32975-21sshd10:06:353
67332570,0sleep08118-21diskmemload09:43:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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