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2023-03-28 - 06:57

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.2-rt19 (Profile)

Latency plot of system in rack #0, slot #3
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 rack0slot3.osadl.org (updated Tue Mar 28, 2023 00:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25904682358313,14sleep70-21swapper/719:08:4213
25902302354333,15sleep40-21swapper/419:05:5810
25902552353334,13sleep100-21swapper/1019:06:202
25902492352345,5sleep60-21swapper/619:06:1612
25904532350311,32sleep140-21swapper/1419:08:346
25904512346327,13sleep120-21swapper/1219:08:314
25903612342323,13sleep130-21swapper/1319:07:285
25902082342305,13sleep90-21swapper/919:05:4815
25904982340319,14sleep150-21swapper/1519:09:077
25904692339320,13sleep80-21swapper/819:08:4414
25904592338319,13sleep20-21swapper/219:08:388
25904242335316,13sleep50-21swapper/519:08:0811
25905032334315,13sleep30-21swapper/319:09:119
25903862330310,14sleep10-21swapper/119:07:481
25902902328309,13sleep00-21swapper/019:06:420
25902372328309,13sleep110-21swapper/1119:06:053
27667082630,0sleep120-21swapper/1222:45:004
27667082630,0sleep120-21swapper/1222:45:004
259079699520,21cyclictest0-21swapper/1322:45:105
259079699520,21cyclictest0-21swapper/1322:45:095
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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