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2023-05-31 - 03:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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-M620 @2667 MHz, Linux 4.19.106-rt45+ (Profile)

Latency plot of shadow in rack #3, slot #6
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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack3slot6s.osadl.org (updated Wed May 31, 2023 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1621121420,1sleep10-21swapper/120:20:431
211022118106,6sleep30-21swapper/319:07:593
21131210787,15sleep20-21swapper/219:08:222
20367210179,15sleep00-21swapper/019:05:190
2095329579,11sleep10-21swapper/119:06:051
58852720,1sleep10-21swapper/121:15:271
57572630,0sleep20-21swapper/223:27:212
21289993616,18cyclictest0-21swapper/320:45:163
2128899350,33cyclictest0-21swapper/200:15:192
261712290,0sleep00-21swapper/022:27:090
2128699255,2cyclictest0-21swapper/020:00:180
2128699221,8cyclictest908-21diskmemload21:51:280
2128699221,19cyclictest13044-21rm22:10:150
2128699220,20cyclictest0-21swapper/022:05:340
2128699220,12cyclictest0-21swapper/023:31:260
2128699220,12cyclictest0-21swapper/021:21:400
2128899210,2cyclictest0-21swapper/220:50:122
2128699211,18cyclictest0-21swapper/021:25:220
2128699210,2cyclictest0-21swapper/021:39:460
2128699210,11cyclictest0-21swapper/000:00:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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