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2022-10-04 - 02:04

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 20 highest latencies:
System rack2slot0.osadl.org (updated Tue Oct 04, 2022 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
230042600,0sleep00-21swapper/022:22:110
108582550,0sleep30-21swapper/320:35:223
105072530,0sleep30-21swapper/322:59:523
7412500,0sleep20-21swapper/223:21:382
36952490,0sleep20-21swapper/200:11:082
133122490,0sleep00-21swapper/022:44:140
164482470,0sleep10-21swapper/121:56:131
135662460,1sleep013569-21bash23:25:040
666224220,7sleep20-21swapper/219:09:532
660223919,6sleep10-21swapper/119:09:081
661123210,7sleep00-21swapper/019:09:150
65452308,7sleep30-21swapper/319:08:263
284882200,1sleep3643-21gdbus23:45:063
73182180,0sleep3391rcuc/321:30:003
681199180,1cyclictest1-21systemd21:23:033
64512180,0sleep10-21swapper/120:25:201
680799150,14cyclictest0-21swapper/222:21:282
6807991312,0cyclictest22232-21lspci21:25:252
679999130,12cyclictest614-21dbus-daemon23:35:471
64432130,0sleep10-21swapper/121:45:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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