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2023-03-23 - 05:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 i3-4360 CPU @3700 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of shadow in rack #0, 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 10 highest latencies:
System rack0slot7s.osadl.org (updated Thu Mar 23, 2023 00:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3971782211770,20sleep10-21swapper/119:05:501
3971830211570,19sleep30-21swapper/319:06:283
3971909211163,40sleep20-21swapper/219:07:272
397204829971,17sleep00-21swapper/019:09:130
3972285996763,4cyclictest4129851-21kworker/2:123:47:212
3972280996663,2cyclictest2366-21gnome-shell21:13:591
3972285996564,1cyclictest4193657-21kworker/2:200:39:142
3972287996463,1cyclictest4077517-21sensors22:15:223
3972285996463,1cyclictest4151542-21kworker/2:023:57:562
3972285996463,1cyclictest4151542-21kworker/2:023:50:052
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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