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2021-01-16 - 06:26

Intel(R) Celeron(R) CPU N3350 @ 1.10GHz, Linux 5.9.1-rt18 (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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackcslot4.osadl.org (updated Fri Jan 15, 2021 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6785992810,11cyclictest2540-21apt-get22:50:051
678599278,12cyclictest32152-21apt-get22:40:041
678499269,11cyclictest8584-21apt-get23:15:050
678599259,11cyclictest2329-21apt-get20:55:051
678599253,15cyclictest16968-21apt-get23:45:051
678599252,15cyclictest18357-21apt-get23:50:041
678499258,14cyclictest111rcu_preempt23:05:040
678599249,10cyclictest10374-21apt-get19:20:071
678599242,15cyclictest31157-40apt-check00:35:101
678599242,15cyclictest30554-21apt-get20:40:051
678599242,15cyclictest20998-21apt-get22:00:051
678599242,15cyclictest15953-21apt-get19:40:051
6784992410,2cyclictest111rcu_preempt23:11:380
678599232,15cyclictest26740-21apt-get00:20:041
678599232,14cyclictest31939-21apt-get20:45:071
678599232,14cyclictest28128-21apt-get00:25:081
678599232,14cyclictest16811-21apt-get21:45:051
678599232,14cyclictest14013-21apt-get21:35:051
678599231,18cyclictest20371-21apt-get19:55:021
678599231,15cyclictest27968-21apt-get22:25:041
678599230,20cyclictest8563-21apt-get19:15:051
678499239,10cyclictest15581-21apt-get23:40:040
678499232,14cyclictest21783-21apt-get20:00:050
678599223,12cyclictest29356-21apt-get22:30:051
678599222,14cyclictest3737-21apt-get21:00:031
678599222,14cyclictest25322-21apt-get00:15:051
678599222,13cyclictest21158-21apt-get00:00:051
678599222,13cyclictest18982-21apt-get19:50:051
678599222,13cyclictest18199-21apt-get21:50:041
678599221,4cyclictest2403-21grep22:50:001
678599221,16cyclictest14171-21apt-get23:35:031
678599220,6cyclictest8427-21cron23:14:591
678499222,13cyclictest17592-21apt-get19:45:100
678499222,12cyclictest3928-21apt-get22:55:040
678499220,20cyclictest28877-21snmp_o5powerctl22:25:160
678599212,14cyclictest30744-21apt-get22:35:021
678599212,13cyclictest26580-21apt-get22:20:041
678599212,13cyclictest24561-21apt-get20:10:071
678599212,13cyclictest23935-21apt-get00:10:081
678599212,13cyclictest22549-21apt-get00:05:041
678599212,13cyclictest22390-21apt-get22:05:051
678599212,13cyclictest13149-21apt-get19:30:051
678599212,13cyclictest12776-21apt-get23:30:051
678599211,9cyclictest27757-21apt-get20:30:091
678599211,3cyclictest5782-40apt-check23:05:101
678599211,14cyclictest11390-21apt-get23:25:041
678599211,13cyclictest19586-21apt-get21:55:051
678599210,4cyclictest4319-21idleruntime22:55:081
678599210,4cyclictest17592-21apt-get19:45:061
678499212,12cyclictest8953-21apt-get19:15:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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