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2021-10-16 - 14:22

Intel(R) Atom(TM) CPU N455 @ 1.66GHz, 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 100 highest latencies:
System rack3slot6 (updated Sat Oct 16, 2021 12:45:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
54629913551,21cyclictest18660-21sendmail-msp11:00:190
54629913551,21cyclictest18660-21sendmail-msp11:00:180
5186210334,31sleep10-21swapper/107:08:251
546699995,34cyclictest488-21dbus-daemon11:40:171
546699967,67cyclictest488-21dbus-daemon07:40:191
5466999615,54cyclictest0-21swapper/109:55:181
5466999516,59cyclictest0-21swapper/109:40:171
5466999435,36cyclictest520-21gdbus09:00:171
5466999435,36cyclictest520-21gdbus09:00:161
5462999458,20cyclictest488-21dbus-daemon09:40:200
5462999457,23cyclictest11976-21sendmail-msp10:40:170
5462999258,23cyclictest9-21ksoftirqd/010:55:150
5466999136,36cyclictest488-21dbus-daemon10:40:201
5466999121,51cyclictest0-21swapper/111:00:191
5466999121,51cyclictest0-21swapper/111:00:191
5462999059,18cyclictest9-21ksoftirqd/008:40:230
5462998957,22cyclictest29087-21seq11:30:180
5462998951,23cyclictest488-21dbus-daemon09:20:190
5466998810,53cyclictest0-21swapper/108:40:201
546699878,21cyclictest11641-21apt-get12:15:151
546699878,21cyclictest11641-21apt-get12:15:141
546699876,22cyclictest7724-21apt-get07:15:161
546699876,19cyclictest31176-21apt-get08:25:141
5462998725,27cyclictest18835-21kworker/0:211:05:160
546699868,19cyclictest17847-21apt-get07:45:181
546699867,21cyclictest15000-21apt-get12:25:161
546699867,20cyclictest8325-21apt-get12:05:151
546699867,19cyclictest24066-21apt-get11:15:151
5462998654,17cyclictest0-21swapper/009:50:170
546699857,24cyclictest8539-21apt-get10:30:201
546699857,21cyclictest20958-21apt-get09:30:171
546699856,23cyclictest15469-21apt-get10:50:161
546699856,21cyclictest25965-21apt-get09:45:171
546699856,20cyclictest27416-21apt-get11:25:171
5466998535,31cyclictest5037-21sendmail-msp10:20:171
5466998526,51cyclictest520-21gdbus11:20:121
5466998519,57cyclictest488-21dbus-daemon08:00:161
546699850,17cyclictest25338-21switchtime08:05:391
546699850,15cyclictest29115-21idleruntime-cro09:55:001
5462998513,57cyclictest0-21swapper/008:10:210
546699846,21cyclictest1865-21apt-get10:10:211
546699846,21cyclictest10460-21apt-get10:35:181
546699845,19cyclictest19517-21apt-get07:50:211
5466998412,52cyclictest0-21swapper/109:20:161
546699837,22cyclictest15947-21apt-get09:15:191
546699837,22cyclictest15947-21apt-get09:15:191
546699837,20cyclictest14407-21apt-get07:35:231
546699836,23cyclictest21177-21apt-get07:55:231
546699836,22cyclictest9982-21apt-get12:10:161
546699836,19cyclictest32630-21apt-get10:05:181
546699835,22cyclictest6667-21apt-get12:00:211
546699834,24cyclictest5419-21apt-get08:45:161
5466998321,55cyclictest5793-21systemd-journal07:33:011
5466998321,55cyclictest488-21dbus-daemon10:00:201
5462998353,18cyclictest9-21ksoftirqd/008:55:210
546699827,23cyclictest13350-21apt-get12:20:261
546699827,21cyclictest14277-21apt-get09:10:171
546699826,24cyclictest7354-21apt-get08:50:191
546699826,20cyclictest9015-21apt-get08:55:201
546699826,20cyclictest30743-21apt-get11:35:191
546699826,20cyclictest30743-21apt-get11:35:181
546699825,21cyclictest22418-21apt-get11:10:271
546299826,36cyclictest9-21ksoftirqd/011:10:240
5462998215,54cyclictest0-21swapper/011:35:200
5462998215,54cyclictest0-21swapper/011:35:190
546699818,21cyclictest6871-21apt-get10:25:181
546699816,24cyclictest17130-21apt-get10:55:141
546699816,23cyclictest4974-21apt-get11:55:171
5466998120,55cyclictest488-21dbus-daemon08:20:191
5462998116,53cyclictest0-21swapper/007:15:190
546699807,24cyclictest26182-21apt-get08:10:191
546699807,22cyclictest11069-21apt-get07:25:161
546699807,21cyclictest20483-21apt-get11:05:151
546699807,18cyclictest383-21apt-get08:30:211
546699807,18cyclictest22621-21apt-get09:35:191
546699806,24cyclictest3517-21apt-get10:15:171
546699806,21cyclictest3314-21apt-get11:50:171
546699806,19cyclictest18325-21apt-get12:35:141
546699805,21cyclictest27844-21apt-get08:15:211
546699805,21cyclictest1662-21apt-get11:45:241
5466998013,56cyclictest0-21swapper/111:30:161
5462998050,18cyclictest0-21swapper/012:15:150
5462998050,18cyclictest0-21swapper/012:15:140
5462998013,53cyclictest0-21swapper/008:15:220
5462998010,43cyclictest488-21dbus-daemon07:20:160
546699796,18cyclictest9405-21apt-get07:20:171
546699795,25cyclictest16660-21apt-get12:30:171
5466997912,57cyclictest0-21swapper/109:25:181
5462997913,50cyclictest0-21swapper/011:45:220
546699787,22cyclictest5559-21apt-get07:10:211
546699786,21cyclictest2073-21apt-get08:35:161
546699786,20cyclictest13808-21apt-get10:45:171
5462997814,49cyclictest0-21swapper/011:20:260
385827825,41sleep00-21swapper/007:05:150
546699776,20cyclictest12351-21apt-get09:05:151
546299772,63cyclictest9-21ksoftirqd/007:25:200
5462997711,54cyclictest0-21swapper/010:30:200
5462997613,51cyclictest9-21ksoftirqd/012:20:290
5462997613,51cyclictest0-21swapper/010:25:180
5462997513,27cyclictest0-21swapper/008:50:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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