You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2019-11-15 - 10:53

Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, Linux 5.2.21-rt13 (Profile)

Latency plot of system in rack #0, slot #8
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 -Up99 -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 rack0slot8.osadl.org (updated Fri Nov 15, 2019 00:50:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
249842511503,4sleep20-21swapper/219:09:528
248312494487,4sleep150-21swapper/1519:07:587
249172423417,3sleep130-21swapper/1319:08:595
248802412403,5sleep30-21swapper/319:08:339
246892412406,3sleep50-21swapper/519:05:5511
247902411405,4sleep90-21swapper/919:07:2015
225002411402,5sleep40-21swapper/419:05:0610
249292410402,4sleep80-21swapper/819:09:1014
210572409402,4sleep00-21swapper/019:05:010
246922408400,5sleep60-21swapper/619:05:5712
247632406398,4sleep10-21swapper/119:06:551
247332406396,6sleep70-21swapper/719:06:2913
246772406397,5sleep100-21swapper/1019:05:442
246982403397,4sleep120-21swapper/1219:06:024
246972398391,4sleep110-21swapper/1119:06:013
249602390382,5sleep140-21swapper/1419:09:326
42212420,1sleep228-21ksoftirqd/222:43:128
281072390,0sleep140-21swapper/1423:25:026
25336993717,3cyclictest0-21swapper/922:55:1315
161432360,0sleep00-21swapper/021:15:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional