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2019-07-24 - 00:32

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 about 1.07 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 1.05 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 Tue Jul 23, 2019 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
297082272210,45sleep10-21swapper/107:09:521
2991899271263,4cyclictest25431-21strings08:10:100
291082260191,52sleep00-21swapper/007:06:070
2992099171167,2cyclictest0-21swapper/108:10:111
1771321220,2sleep02991899cyclictest10:20:060
234962540,3sleep00-21swapper/012:30:010
2992099271,20cyclictest2992-21lsb_release11:20:011
29918992511,6cyclictest14524-21apt-get09:00:050
29920992418,3cyclictest14899-21lsb_release12:00:001
29920992416,3cyclictest28251-21apt-get10:55:121
29918992411,6cyclictest21050-21apt-get09:15:050
29918992410,7cyclictest18206-21apt-get07:55:060
76032230,3sleep10-21swapper/108:43:481
2992099235,17cyclictest23-21rcuc/108:52:541
29920992216,3cyclictest3527-21apt-get08:35:061
2992099220,19cyclictest11246-40apt-check10:05:061
2991899229,6cyclictest16965-21apt-get12:10:040
2991899224,10cyclictest12316-21apt-get08:55:030
2991899223,9cyclictest12860-21apt-get11:55:020
2991899223,10cyclictest8790-21apt-get11:40:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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