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2022-11-26 - 22:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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 Atom E3940 @1600 MHz, Linux 4.16.15-rt7 (Profile)

Latency plot of shadow in rack #5, 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 rack5slot3s.osadl.org (updated Sat Nov 26, 2022 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
156922239166,23sleep00-21swapper/007:06:590
156802239163,24sleep30-21swapper/307:06:503
157992236162,23sleep10-21swapper/107:08:211
158472233164,55sleep20-21swapper/207:08:582
2589721040,4sleep21603899cyclictest07:30:182
233102800,2sleep20-21swapper/208:35:282
209612660,4sleep220965-21gltestperf09:45:292
190582580,1sleep00-21swapper/009:40:250
1603199471,14cyclictest0-21swapper/109:24:171
199362460,1sleep00-21swapper/010:55:240
1602699441,29cyclictest23499-21/usr/sbin/munin07:25:240
1604299431,33cyclictest23163-21/usr/sbin/munin11:05:203
1604299431,29cyclictest0-21swapper/310:50:203
1603199421,11cyclictest0-21swapper/110:29:201
1604299415,29cyclictest7864-40dnf11:41:333
1602699411,29cyclictest2756-21/usr/sbin/munin09:05:280
1603199401,9cyclictest0-21swapper/110:56:361
1603199401,18cyclictest0-21swapper/111:44:081
1602699401,30cyclictest823-21snmpd12:18:410
1604299391,29cyclictest1553-21awk11:30:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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