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2023-01-31 - 04:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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x86 Intel Core i7 7828EQ @3000 MHz, Linux 4.19.37-rt20 (Profile)

Latency plot of shadow in rack #9, slot #3
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 rack9slot3s.osadl.org (updated Tue Jan 31, 2023 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134291690,48ptp4l0-21swapper/119:06:421
134291590,42ptp4l0-21swapper/019:06:200
2627325142,7sleep30-21swapper/319:06:253
2627724945,2sleep20-21swapper/219:06:292
243492490,0sleep00-21swapper/000:20:210
134291220,0ptp4l0-21swapper/123:40:201
134291210,0ptp4l0-21swapper/000:05:260
134291200,0ptp4l0-21swapper/123:45:361
134291200,0ptp4l0-21swapper/123:00:281
134291190,0ptp4l0-21swapper/122:05:201
134291190,0ptp4l0-21swapper/119:25:281
134291190,0ptp4l0-21swapper/100:35:351
2681399187,5cyclictest26370-21cat00:25:013
134291180,0ptp4l0-21swapper/121:00:221
134291180,0ptp4l0-21swapper/120:40:021
134291180,0ptp4l0-21swapper/019:15:030
134291180,0ptp4l0-21swapper/019:15:020
134291170,1ptp4l25705-21apt-get23:20:180
134291170,0ptp4l0-21swapper/222:45:262
134291170,0ptp4l0-21swapper/020:10:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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