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2023-01-31 - 05:47

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 Tue Jan 31, 2023 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12322211380,5sleep30-21swapper/319:06:223
12604211295,12sleep10-21swapper/119:09:571
12585210787,15sleep00-21swapper/019:09:440
1240729584,6sleep20-21swapper/219:07:252
225992820,4sleep01263699cyclictest23:35:230
120702720,0sleep00-21swapper/023:10:230
80672700,1sleep10-21swapper/123:00:231
71492260,1sleep10-21swapper/120:20:311
1263999220,20cyclictest0-21swapper/322:05:153
1263999210,19cyclictest0-21swapper/319:55:153
12636992118,2cyclictest0-21swapper/020:00:170
1263699210,19cyclictest0-21swapper/021:15:160
1263799200,18cyclictest0-21swapper/119:55:151
1263799190,17cyclictest0-21swapper/120:15:161
12637991815,2cyclictest208250irq/24-eth122:40:211
12638991713,2cyclictest0-21swapper/200:10:212
1263899161,3cyclictest0-21swapper/220:10:252
12638991613,2cyclictest12006-21taskset20:35:172
12638991612,3cyclictest0-21swapper/221:15:162
1263799161,13cyclictest17924-21apt-get23:25:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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