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2019-06-26 - 20:16

Intel(R) Celeron(R) CPU N3350 @ 1.10GHz, Linux 4.18.7-rt5 (Profile)

Latency plot of system in rack #c, slot #4
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
The worst-case latency is NOT 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 1.35 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 rackcslot4.osadl.org (updated Wed Jun 26, 2019 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
297032273193,25sleep10-21swapper/107:05:361
298152256183,56sleep00-21swapper/007:06:190
3059799232228,2cyclictest25762-21apt-get09:25:041
3059299148142,3cyclictest25771-21appstreamcli09:25:040
3059799282,6cyclictest4151-21apt-get07:20:131
30597992518,4cyclictest21034-21lsb_release09:15:001
30597992517,5cyclictest32203-21lsb_release09:40:011
30597992417,3cyclictest15669-21apt-get10:15:071
3059799240,20cyclictest3947-21diskstats08:35:051
3059299249,8cyclictest22195-21apt-get10:30:050
30592992411,6cyclictest14251-21apt-get11:25:040
3059799231,4cyclictest27562-21apt-get11:55:071
3059799231,18cyclictest29280-21apt-get10:45:071
3059799230,20cyclictest14513-21lsb_release09:00:001
3059799230,20cyclictest14513-21lsb_release09:00:001
3059299239,7cyclictest24360-21apt-get10:35:050
30597992215,3cyclictest11088-21apt-get10:05:091
3059799221,18cyclictest26368-21apt-get10:40:151
3059299223,10cyclictest12302-21apt-get07:40:040
3059799213,16cyclictest23074-21cat08:05:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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