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2019-07-16 - 02:23

VIA QuadCore L4700 @ 1.2+ GHz, Linux 3.18.43-rt46 (Profile)

Latency plot of system in rack #b, slot #4
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.
Characteristics of the 20 highest latencies:
System rackbslot4.osadl.org (updated Mon Jul 15, 2019 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
314599825,7cyclictest0-21swapper/321:09:493
314599815,70cyclictest0-21swapper/322:47:383
314599744,40cyclictest0-21swapper/322:00:223
314599725,34cyclictest0-21swapper/323:12:143
314599725,33cyclictest0-21swapper/321:12:473
314599724,37cyclictest0-21swapper/300:12:563
314599722,41cyclictest16558-21ssh00:07:233
3145997212,5cyclictest0-21swapper/322:27:193
3145997212,5cyclictest0-21swapper/322:27:193
314599719,7cyclictest0-21swapper/321:45:463
314599719,7cyclictest0-21swapper/321:45:463
314599717,31cyclictest0-21swapper/322:08:113
314599715,7cyclictest0-21swapper/321:55:583
314599715,34cyclictest0-21swapper/323:59:183
314599715,34cyclictest0-21swapper/322:55:293
314599715,34cyclictest0-21swapper/322:44:463
314599715,34cyclictest0-21swapper/321:47:503
314599715,34cyclictest0-21swapper/300:04:183
314599715,33cyclictest0-21swapper/300:29:403
314599715,33cyclictest0-21swapper/300:29:403
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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