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2019-07-17 - 00:51

Intel(R) Celeron(R) CPU G3900 @ 2.80GHz, Linux 4.18.7-rt5 (Profile)

Latency plot of system in rack #c, slot #5
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
The worst-case latency is about 1.12 times higher under extreme CPU load.
Results of all systems under extreme CPU load are combined on this summary graph.
The worst-case latency is about 3.50 times higher under graphics load.
Results of all systems with accelerated graphics are combined on this summary graph.
Characteristics of the 20 highest latencies:
System rackcslot5.osadl.org (updated Tue Jul 16, 2019 12:43:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
226392400,0sleep10-21swapper/108:25:001
180972340,0sleep00-21swapper/012:20:140
25132992222,0cyclictest0-21swapper/012:14:380
2513299220,1cyclictest0-21swapper/011:50:110
2513399210,0cyclictest0-21swapper/110:25:101
2513299203,16cyclictest0-21swapper/008:00:120
2513299202,17cyclictest1118-21/usr/sbin/munin07:30:160
25132991919,0cyclictest0-21swapper/010:27:420
2513299190,8cyclictest0-21swapper/007:25:040
2513399184,6cyclictest7227-21apt-get07:45:041
2513399180,6cyclictest9016-21apt-get12:00:041
2513399180,1cyclictest0-21swapper/109:00:101
2513299180,7cyclictest0-21swapper/007:35:040
25133991716,0cyclictest7682-21diskmemload11:05:011
2513399170,6cyclictest12712-21runrttasks07:58:141
2513399170,5cyclictest0-21swapper/110:45:031
2513399170,2cyclictest0-21swapper/109:12:451
2513299172,10cyclictest0-21swapper/009:05:040
2513299171,9cyclictest9749-21apt-get09:15:030
2513299171,3cyclictest27712-21apt-get07:15:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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