You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2021-09-19 - 20:00

Pentium(R) Dual-Core CPU T4500 @ 2.30GHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #6, slot #7
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
Characteristics of the 20 highest latencies:
System rack6slot7.osadl.org (updated Sun Sep 19, 2021 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
162721170,1sleep10-21swapper/122:06:501
5689997059,9cyclictest1218-21dbus-daemon20:18:081
20332680,0sleep00-21swapper/022:07:070
85412670,1sleep10-21swapper/121:32:131
5689996757,9cyclictest1218-21dbus-daemon23:34:081
568999673,62cyclictest1228-21NetworkManager20:49:081
568999663,61cyclictest1218-21dbus-daemon19:18:081
568599664,61cyclictest0-21swapper/019:29:060
568599663,62cyclictest0-21swapper/020:59:060
568599654,60cyclictest0-21swapper/020:55:070
568599654,60cyclictest0-21swapper/019:15:050
568599653,61cyclictest7918-21ssh22:57:070
568599653,61cyclictest0-21swapper/020:20:080
568599653,61cyclictest0-21swapper/020:03:080
568599653,61cyclictest0-21swapper/019:39:060
568599652,62cyclictest0-21swapper/020:34:080
5689996460,2cyclictest1218-21dbus-daemon20:15:081
5689996432,31cyclictest0-21swapper/122:46:081
5685996458,4cyclictest12414-21diskstats00:27:060
568599644,59cyclictest0-21swapper/020:24:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional