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2019-07-17 - 03:04

Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz, Linux 4.19.1-rt3 (Profile)

Latency plot of system in rack #4, slot #6
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 rack4slot6.osadl.org (updated Wed Jul 17, 2019 00:46:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2748527851,7pltrace0-21swapper/019:07:400
2748527759,7pltrace0-21swapper/419:08:344
2456627564,6sleep20-21swapper/219:09:332
2440027563,7sleep30-21swapper/319:07:093
2443827463,6sleep50-21swapper/519:07:435
2064252700,0pltrace0-21swapper/421:51:384
2458526856,7sleep60-21swapper/619:09:456
2438026856,7sleep10-21swapper/119:06:511
1500452660,0pltrace0-21swapper/423:36:384
2451726553,7sleep70-21swapper/719:08:497
2908352610,0pltrace0-21swapper/422:06:384
269922590,0sleep20-21swapper/200:00:042
663752220,3pltrace2480099cyclictest21:26:382
2478899221,17cyclictest0-21swapper/019:10:590
2478899221,17cyclictest0-21swapper/019:10:590
2478899190,16cyclictest0-21swapper/019:15:590
799852180,0pltrace0-21swapper/100:25:031
519652180,1pltrace5199-21grep00:16:383
519652180,1pltrace5199-21grep00:16:383
2478899180,14cyclictest0-21swapper/022:10:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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