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2022-12-04 - 22:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 i3-6100U @2300 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of shadow in rack #7, slot #7
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 rack7slot7s.osadl.org (updated Sun Dec 04, 2022 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26295218461,93sleep10-21swapper/119:09:411
26210218461,117sleep30-21swapper/319:08:363
2873721210,4sleep00-21swapper/022:48:350
24198210362,35sleep20-21swapper/219:05:022
2597428965,20sleep00-21swapper/019:05:320
129762680,0sleep00-21swapper/021:44:070
44982630,2sleep30-21swapper/321:20:273
158762630,3sleep22660399cyclictest00:15:252
255962600,1sleep10-21swapper/122:46:211
171242260,6sleep03-21ksoftirqd/000:16:070
26603992319,3cyclictest29935-21irqstats22:30:242
2660199231,1cyclictest0-21swapper/022:30:250
2660199220,14cyclictest20500-21munin-run23:40:000
2660199211,18cyclictest0-21swapper/022:25:180
2660199202,14cyclictest3293-21kworker/0:000:24:130
2660399190,1cyclictest0-21swapper/222:54:172
2660199191,13cyclictest3293-21kworker/0:000:30:240
265972190,2sleep10-21swapper/121:33:111
239802190,1sleep023983-21cpuspeed_turbos00:00:210
2660199180,13cyclictest16045-21kworker/0:221:27:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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