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2019-07-23 - 11:25

Intel(R) Celeron(R) CPU G1820 @ 2.70GHz, Linux 3.18.40-rt42 (Profile)

Latency plot of system in rack #a, slot #8
Data to construct the above plot have been generated using the RT test utility cyclictest.
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
Compare latency of primary with shadow system
The worst-case latency is NOT higher under extreme CPU load.
Results of all systems under extreme CPU load are combined on this summary graph.
The worst-case latency is about 1.40 times higher under graphics load.
Results of all systems with accelerated graphics are combined on this summary graph.
Characteristics of the 20 highest latencies:
System rackaslot8.osadl.org (updated Tue Apr 16, 2019 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3052922614,0sleep00-21swapper/019:06:220
3022522615,0sleep10-21swapper/119:05:151
3092299131,0cyclictest0-21swapper/119:10:591
3092199120,0cyclictest32465-21console-kit-dae19:11:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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