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2023-03-20 - 19:59

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 5.15.79-rt54 (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 Mon Mar 20, 2023 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5879210475,9sleep10-21swapper/107:09:491
595029581,10sleep30-21swapper/307:09:593
554728864,6sleep20-21swapper/207:05:322
574828270,8sleep00-21swapper/007:08:060
604899290,25cyclictest0-21swapper/211:17:362
604599280,3cyclictest0-21swapper/110:19:361
604899270,26cyclictest0-21swapper/211:50:082
604899260,26cyclictest0-21swapper/209:11:002
604899260,25cyclictest11801-21cut07:20:192
48432250,1sleep20-21swapper/210:33:322
604899230,23cyclictest0-21swapper/209:42:232
604899221,20cyclictest0-21swapper/208:10:142
604899220,1cyclictest0-21swapper/212:18:472
604299222,2cyclictest141rcu_preempt10:32:290
605199210,1cyclictest0-21swapper/310:51:043
604899219,11cyclictest1089-21munin-node11:35:002
6042992121,0cyclictest0-21swapper/008:40:150
604299210,0cyclictest0-21swapper/009:37:360
604299207,6cyclictest7178-21ssh09:35:000
6045991914,1cyclictest25-21ksoftirqd/110:33:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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