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2022-12-04 - 22:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 i3-8145UE @2200 MHz, Linux 5.10.27-rt36 (Profile)

Latency plot of shadow in rack #e, slot #5
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 rackeslot5s.osadl.org (updated Sun Dec 04, 2022 12:43:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
986999301,0cyclictest0-21swapper/012:38:120
986999300,29cyclictest26989-21taskset10:12:470
9870992927,1cyclictest29221-21tr09:10:201
987099290,28cyclictest501-21dbus-daemon07:15:001
987099290,28cyclictest30824-21sed12:25:251
987099290,28cyclictest27897-21diskmemload09:45:191
987099290,28cyclictest10136-21taskset10:28:511
986999290,28cyclictest7292-21grep09:20:270
986999290,1cyclictest6438-21munin-run12:35:020
9870992828,0cyclictest0-21swapper/111:51:201
9870992827,1cyclictest20645-21perf07:35:021
9870992827,1cyclictest0-21swapper/112:09:091
987099281,27cyclictest6226-21kworker/u4:010:34:171
987099280,28cyclictest0-21swapper/111:30:061
987099280,28cyclictest0-21swapper/111:00:091
987099280,27cyclictest29108-21df10:15:141
987099280,27cyclictest27439-21pmu-power09:40:211
987099280,27cyclictest11807-21cstates11:35:161
987099280,27cyclictest0-21swapper/109:33:531
987099280,1cyclictest28964-21ssh11:20:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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