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2021-06-17 - 19:12

Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, Linux 5.10.21-rt34 (Profile)

Latency plot of system in rack #0, slot #8
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 -Up99 -i200 -h400 -q done
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 20 highest latencies:
System rack0slot8.osadl.org (updated Thu Jun 17, 2021 12:45:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
391472099433427,3cyclictest2161343-21Web11:35:332
391471499431431,0cyclictest0-21swapper/508:38:2611
391472899430427,2cyclictest4061308-21munin-run09:30:017
391472899430424,4cyclictest3706478-21Web11:35:337
3914720994300,0cyclictest0-21swapper/1010:49:262
3914723994290,428cyclictest0-21swapper/1212:00:434
391472099428427,1cyclictest4144546-21kworker/u32:111:27:192
3914720994280,0cyclictest0-21swapper/1012:00:432
3914720994280,0cyclictest0-21swapper/1008:13:472
391471499428426,2cyclictest78280-21kworker/u32:411:47:2411
3914714994280,428cyclictest0-21swapper/511:18:3811
3914720994270,427cyclictest0-21swapper/1010:09:442
3914720994270,0cyclictest0-21swapper/1009:07:152
3914720994270,0cyclictest0-21swapper/1007:25:022
391471699427421,3cyclictest44811-21turbostat11:10:0013
3914716994270,426cyclictest0-21swapper/707:49:5513
391472399426425,1cyclictest3964193-21kworker/u32:008:28:304
391472399425423,2cyclictest3950675-21kworker/u32:107:59:334
3914723994250,0cyclictest0-21swapper/1207:12:064
391472099425425,0cyclictest0-21swapper/1008:55:062
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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