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2022-01-19 - 08:31

Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, Linux 5.10.17-rt32 (Profile)

Latency plot of system in rack #0, slot #5
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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack0slot5.osadl.org (updated Wed Jan 12, 2022 00:43:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27686819944718,429cyclictest0-21swapper/021:25:120
276873899420419,1cyclictest2954465-21kworker/u32:622:17:386
276872699420419,1cyclictest0-21swapper/1123:23:433
276872699419419,0cyclictest0-21swapper/1122:57:243
276872699419418,1cyclictest0-21swapper/1122:06:023
2768726994190,419cyclictest0-21swapper/1121:37:533
276872699418418,0cyclictest0-21swapper/1119:30:043
276872699418418,0cyclictest0-21swapper/1119:26:093
276871599418417,1cyclictest2817514-21kworker/u32:121:25:1215
276872699415414,1cyclictest2775579-21kworker/u32:819:45:463
276872699410409,1cyclictest2879401-21kworker/u32:221:19:523
276873899409409,0cyclictest0-21swapper/1423:27:406
276873899405405,0cyclictest0-21swapper/1423:08:326
276868899401400,1cyclictest2901596-21kworker/u32:922:39:148
276871099385384,1cyclictest2867823-21kworker/8:021:25:1214
276873099382382,0cyclictest0-21swapper/1221:25:124
276872399382382,0cyclictest0-21swapper/1022:39:142
276868199374374,0cyclictest0-21swapper/022:39:140
276871599370369,1cyclictest50050irq/164-i91523:11:1615
276868899360358,2cyclictest1694797-21Xorg19:11:048
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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