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2021-10-24 - 01:21

Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, Linux 5.14.11-300.fc35.x86_64 (Profile)

Latency plot of system in rack #0, slot #6
Note that this system runs a non-RT kernel.
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 -h200 -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 rack0slot6.osadl.org (updated Mon Oct 11, 2021 00:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8745172377340,30sleep20-21swapper/219:06:028
8745412374335,12sleep80-21swapper/819:06:2414
8745652373332,13sleep140-21swapper/1419:06:476
8747462367329,12sleep10-21swapper/119:09:301
8745552364325,12sleep50-21swapper/519:06:3811
8744882364347,11sleep90-21swapper/919:05:3715
8746472361342,12sleep60-21swapper/619:08:0012
8745402358338,13sleep70-21swapper/719:06:2413
8717142358339,12sleep150-21swapper/1519:05:117
8747142351331,13sleep30-21swapper/319:09:009
8746852351333,12sleep100-21swapper/1019:08:352
8747222350330,13sleep110-21swapper/1119:09:083
8745112349329,13sleep130-21swapper/1319:05:585
8746342346327,13sleep120-21swapper/1219:07:504
8745002345327,12sleep40-21swapper/419:05:4810
8745502344334,7sleep00-21swapper/019:06:320
87510599299298,1cyclictest932890-21kworker/u32:320:28:592
87509999292290,2cyclictest0-21swapper/919:14:5915
87511499285282,3cyclictest2069-21Xorg00:26:004
87511499285282,3cyclictest2069-21Xorg00:25:594
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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