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2021-10-26 - 23:06

Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, Linux 5.10.27-rt36 (Profile)

Latency plot of system in rack #0, slot #7
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 rack0slot7.osadl.org (updated Tue Oct 26, 2021 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
249676499399398,1cyclictest2445170-21kworker/u32:219:10:2411
24962402398392,3sleep20-21swapper/219:09:318
24962192394389,3sleep80-21swapper/819:09:2014
249676099387387,0cyclictest0-21swapper/419:10:2410
24960192353347,3sleep60-21swapper/619:07:1012
24962332341335,3sleep150-21swapper/1519:09:277
24959172295289,3sleep140-21swapper/1419:05:586
249679499273273,0cyclictest0-21swapper/1319:10:255
249674999271271,0cyclictest36152-21seamonkey19:11:048
249677599270268,2cyclictest5303-21Xorg19:10:0414
249675599266266,0cyclictest0-21swapper/319:11:129
249679299260260,0cyclictest19750irq/127-xhci_hc19:10:244
249680299256255,1cyclictest6807-21gnome-shell19:10:587
24961682248243,2sleep110-21swapper/1119:08:513
24960782244236,5sleep70-21swapper/719:07:4313
24960812239213,23sleep100-21swapper/1019:07:462
24961322233222,3sleep00-21swapper/019:08:240
24962432224219,3sleep40-21swapper/419:09:3210
24962382224218,3sleep10-21swapper/119:09:291
24962802215209,3sleep90-21swapper/919:09:5315
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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