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2022-07-05 - 02:10

x86 Intel N455 @1660 MHz, Linux 5.4.34-rt21 (Profile)

Latency plot of system in rack #3, 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 -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 50 highest latencies:
System rack3slot6 (updated Tue Jul 05, 2022 00:45:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23229991089,91cyclictest2397-21apt-get22:55:150
137221080,14sleep12323399cyclictest00:25:151
30921060,13sleep12323399cyclictest19:35:291
232299910419,69cyclictest0-21swapper/022:20:110
2648721020,15sleep12323399cyclictest22:30:061
23229991028,84cyclictest30492-21apt-get19:30:130
23229991010,17cyclictest2578-21apt-get21:20:120
23233999916,61cyclictest0-21swapper/120:20:141
2323399978,69cyclictest0-21swapper/121:55:201
238652960,15sleep12323399cyclictest23:55:311
2322999960,12cyclictest29226-21irqstats19:25:230
2323399959,62cyclictest0-21swapper/122:45:211
2322999959,72cyclictest4077-21apt-get23:00:140
2323399938,60cyclictest0-21swapper/100:20:121
23233999310,58cyclictest0-21swapper/121:40:151
23229999310,69cyclictest25483-21apt-get19:15:140
2322999930,12cyclictest28014-21sshd19:20:350
2323399927,62cyclictest0-21swapper/119:30:121
2322999928,70cyclictest8329-21apt-get20:00:120
2322999919,70cyclictest26558-21apt-get00:05:130
2322999919,70cyclictest26558-21apt-get00:05:120
2322999918,68cyclictest9994-21apt-get20:05:120
2322999918,67cyclictest30396-21apt-get00:15:260
69922900,15sleep12323399cyclictest21:30:351
2323399908,61cyclictest0-21swapper/123:50:141
2322999909,69cyclictest14608-21apt-get23:30:170
2322999908,71cyclictest28167-21apt-get22:35:120
2322999908,71cyclictest28167-21apt-get22:35:110
2322999908,68cyclictest32086-21apt-get00:20:120
2322999908,66cyclictest1314-21apt-get00:25:140
23229999029,51cyclictest502-21gdbus21:45:080
23229999017,58cyclictest0-21swapper/019:45:120
2284129013,40sleep00-21swapper/019:07:070
2323399897,27cyclictest0-21swapper/121:25:121
2322999899,64cyclictest19563-21apt-get22:10:140
2322999898,67cyclictest24900-21apt-get00:00:140
2322999890,16cyclictest8895-21apt-get23:15:150
2322999890,15cyclictest31713-21taskset22:45:280
2323399889,58cyclictest0-21swapper/120:00:151
2323399887,57cyclictest0-21swapper/123:40:251
2322999889,70cyclictest2973-21apt-get00:30:120
2322999889,65cyclictest12671-21apt-get23:25:110
2322999889,63cyclictest12892-21apt-get21:50:140
2322999888,69cyclictest21673-21apt-get20:40:120
2322999888,66cyclictest4632-21apt-get00:35:120
23229998811,64cyclictest25002-21apt-get20:50:110
2322999880,18cyclictest10244-21cat21:40:350
2322999880,15cyclictest17062-21irqstats20:25:230
2322999880,14cyclictest26500-21apt-get22:30:110
23233998711,56cyclictest0-21swapper/122:35:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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