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2022-05-24 - 11:03

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.13-rt26 (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 Tue May 24, 2022 00:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
405953799294292,2cyclictest8960-21Xorg22:29:0912
405954799283280,3cyclictest8960-21Xorg23:50:085
405953999282279,3cyclictest8960-21Xorg20:41:1813
405953399282279,3cyclictest8960-21Xorg23:04:098
405953499281278,3cyclictest8960-21Xorg21:24:099
405952899280278,2cyclictest0-21swapper/019:55:080
405953599279278,1cyclictest0-21swapper/421:58:0910
405954099278276,2cyclictest0-21swapper/820:37:0914
405953999278275,2cyclictest9317-21gnome-shell22:50:0913
405954699276272,3cyclictest0-21swapper/1222:59:084
405954599276271,5cyclictest8960-21Xorg22:45:083
405953799276273,3cyclictest8960-21Xorg21:57:0912
405952899276275,1cyclictest0-21swapper/023:15:090
405953699273270,3cyclictest8960-21Xorg19:40:0811
405953499272268,3cyclictest0-21swapper/323:13:099
405953799265264,1cyclictest0-21swapper/622:11:0912
405954899262259,3cyclictest8960-21Xorg22:25:096
405953999262260,1cyclictest0-21swapper/721:15:0913
405952999262259,2cyclictest9317-21gnome-shell23:12:081
405952999257254,3cyclictest8960-21Xorg21:59:081
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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