You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2021-09-27 - 06:21

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 Mon Sep 27, 2021 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
132572264189,16sleep10-21swapper/119:06:521
136762263180,62sleep00-21swapper/019:09:340
1804121660,3sleep01401699cyclictest22:55:260
1804121660,3sleep01401699cyclictest22:55:260
132572420,3sleep10-21swapper/100:00:001
89432410,3sleep0101rcuc/023:50:030
324812340,1sleep10-21swapper/123:30:151
1401899282,6cyclictest4265-21apt-get20:00:151
1401899282,6cyclictest15146-21apt-get20:25:171
1401899271,12cyclictest12716-21apt-get22:45:131
14018992711,10cyclictest19900-21apt-get00:15:151
14018992710,11cyclictest27347-21apt-get22:05:151
14016992712,9cyclictest16119-21apt-get21:40:150
1401899262,20cyclictest20815-21apt-get21:50:191
14018992618,4cyclictest23845-21apt-get20:45:161
14018992612,9cyclictest26438-21apt-get00:30:141
14018992611,11cyclictest30377-21apt-get21:00:171
14018992610,10cyclictest21422-21apt-get19:25:161
1401899259,10cyclictest4026-21apt-get22:25:161
1401899252,19cyclictest23605-21apt-get23:10:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional