You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2019-07-23 - 11:20

Intel(R) Atom(TM) CPU Z530 @ 1.60GHz, Linux 3.12.61-rt81 (Profile)

Latency plot of system in rack #1, slot #8
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 rack1slot8.osadl.org (updated Tue Jul 23, 2019 00:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
223649917901710,53cyclictest0-21swapper/019:19:500
2236499878795,72cyclictest22486-21latency_hist19:10:010
2236599792740,29cyclictest0-21swapper/119:10:021
2236599333252,48cyclictest0-21swapper/119:19:501
219399850,3rtkit-daemon23744-21awk22:25:161
2236499805,68cyclictest0-21swapper/021:40:010
22364997915,58cyclictest0-21swapper/000:09:580
219399780,4rtkit-daemon2192-21rtkit-daemon23:38:371
2236499777,62cyclictest0-21swapper/021:00:030
2236499777,62cyclictest0-21swapper/021:00:030
22364997710,62cyclictest0-21swapper/022:37:580
22365997618,35cyclictest0-21swapper/121:59:591
2236499766,61cyclictest0-21swapper/020:50:050
22364997110,51cyclictest0-21swapper/023:40:000
219399710,8rtkit-daemon0-21swapper/023:02:060
2236499704,60cyclictest0-21swapper/000:19:250
2236499703,38cyclictest30798-21munin-node19:35:140
2236499702,6cyclictest11985-21latency_hist23:30:010
2236499696,54cyclictest30671-21latency_hist19:35:010
2236499695,57cyclictest0-21swapper/019:55:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional