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2022-10-03 - 03:42

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.49-rt47 (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 Mon Oct 03, 2022 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3787351994240,0cyclictest0-21swapper/419:39:5510
378735499406405,1cyclictest3797090-21turbostat19:20:0013
3787364994020,401cyclictest0-21swapper/1420:10:296
378736499401400,1cyclictest0-21swapper/1419:20:596
378736499399399,0cyclictest0-21swapper/1419:36:156
378736499399399,0cyclictest0-21swapper/1419:28:366
378736499398398,0cyclictest0-21swapper/1420:06:016
3787364993960,395cyclictest0-21swapper/1419:58:136
378736099395394,1cyclictest3811140-21turbostat19:39:564
378735999387385,2cyclictest3806691-21turbostat19:34:563
378735899380378,2cyclictest3801591-21turbostat19:29:562
378735399377375,2cyclictest3838490-21kworker/u32:120:10:2912
378735399373369,2cyclictest3801151-21kworker/u32:219:58:1312
378735899372370,2cyclictest3786867-21turbostat19:14:562
3787365993650,365cyclictest0-21swapper/1519:35:017
378735199355354,1cyclictest25250irq/126-ahci[0020:15:0010
378734399354349,5cyclictest0-21swapper/019:49:260
378735699349349,0cyclictest0-21swapper/919:57:0615
3787365993450,345cyclictest0-21swapper/1520:00:007
378734699345343,2cyclictest0-21swapper/219:29:568
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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