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2023-01-29 - 06:45

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 Sun Jan 29, 2023 00:45:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
346859399429427,2cyclictest3472269-21kworker/u32:320:23:039
346860399428425,2cyclictest0-21swapper/1021:50:012
3468600994280,0cyclictest0-21swapper/821:50:0114
346860099426424,2cyclictest3629891-21turbostat21:39:5514
3468600994260,0cyclictest0-21swapper/820:54:1014
346858799426421,5cyclictest3416034-21kworker/0:021:26:410
346860399424423,1cyclictest0-21swapper/1020:54:102
346860399422420,2cyclictest0-21swapper/1020:25:052
346859299420420,0cyclictest0-21swapper/220:59:568
346860199419418,1cyclictest3588215-21turbostat21:19:5515
346859499418418,0cyclictest0-21swapper/421:49:5510
346860499417417,0cyclictest0-21swapper/1120:54:563
346860899412411,1cyclictest0-21swapper/1520:50:017
346860599404402,2cyclictest0-21swapper/1221:29:554
346860099404404,0cyclictest0-21swapper/821:44:5514
346860899402401,1cyclictest0-21swapper/1520:45:017
346860899399398,1cyclictest0-21swapper/1521:00:017
346860899397396,1cyclictest0-21swapper/1520:30:017
346860899393393,0cyclictest0-21swapper/1521:28:037
3468608993930,393cyclictest0-21swapper/1520:35:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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