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2019-07-16 - 02:29

Intel(R) Atom(TM) CPU E3845 @ 1.91GHz, Linux 4.19.37-rt20 (Profile)

Latency plot of system in rack #b, slot #6
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, lowest P state: performance
Compare latency of primary with shadow system
The worst-case latency is about 1.23 times 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 25.38 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 rackbslot6.osadl.org (updated Mon Jul 15, 2019 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
281221610,4sleep1869299cyclictest21:28:301
1045911410,4ptp4l401ktimersoftd/319:23:313
2151621330,2sleep30-21swapper/322:23:253
104591710,1ptp4l401ktimersoftd/300:12:163
262442690,3sleep1241ktimersoftd/121:08:351
322542680,5sleep332258-21ptp4l-jitter20:13:323
81152614,10sleep10-21swapper/119:24:021
40422600,5sleep0868699cyclictest22:38:320
317192590,2sleep00-21swapper/023:08:320
238272580,4sleep1869299cyclictest00:08:401
81422574,10sleep20-21swapper/219:24:232
174712550,1sleep20-21swapper/219:43:272
264272540,2sleep00-21swapper/023:03:260
284482530,2sleep10-21swapper/122:29:461
188552510,2sleep00-21swapper/000:03:370
104591490,2ptp4l11363-21kworker/3:223:52:043
104591470,2ptp4l11363-21kworker/3:223:45:233
104591440,1ptp4l30790-21kworker/3:122:56:063
104591430,1ptp4l401ktimersoftd/300:35:053
8693994133,5cyclictest33-21ksoftirqd/220:43:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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