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2021-06-17 - 19:44

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 20 highest latencies:
System rackcslot4.osadl.org (updated Thu Jun 10, 2021 12:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
674799342,23cyclictest28071-21latency_hist12:05:001
6747993317,9cyclictest5443-21apt-get08:55:151
674799323,10cyclictest18175-40apt-check11:30:151
674799315,9cyclictest7377-21cpuspeed_turbos07:10:131
674799313,12cyclictest26142-21ps11:55:241
674799313,11cyclictest13349-21grep07:30:161
674799313,10cyclictest2573-40apt-check08:45:151
674799309,2cyclictest14411-21apt-get09:25:211
674799307,9cyclictest14525-21grep11:15:251
674799306,9cyclictest0-21swapper/112:10:151
674799305,11cyclictest9938-21cat11:00:231
674799304,11cyclictest16258-21idleruntime-cro11:25:001
674799303,13cyclictest9082-21grep09:05:261
674799303,13cyclictest4629-21awk10:40:291
674799303,11cyclictest14678-21cstates07:35:251
674799302,12cyclictest30759-21cat08:30:191
674799302,12cyclictest27739-21tune2fs08:20:241
674799302,12cyclictest11519-21gzip11:05:271
674799293,9cyclictest7123-21fschecks_count09:00:171
674799293,9cyclictest21216-21snmp_o5powerctl07:55:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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