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2023-03-29 - 02:16

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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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ARM Broadcom BCM2835 @1400 MHz, Linux 4.18.16-rt9 (Profile)

Latency plot of shadow in rack #7, slot #3
Data to construct the above plot have been generated using the RT test utility cyclictest.
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 rack7slot3s.osadl.org (updated Tue Mar 28, 2023 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
850322110,4sleep00-21swapper/007:06:450
9925991022,55cyclictest20976-21diskmemload12:26:370
220272960,2sleep222031-21diskmemload09:11:472
97882890,2sleep20-21swapper/207:11:252
992599863,39cyclictest0-21swapper/011:16:450
72832860,2sleep30-21swapper/309:33:553
992599823,39cyclictest0-21swapper/007:21:390
9925998145,17cyclictest0-21swapper/011:36:360
9925998145,17cyclictest0-21swapper/011:36:360
992599782,39cyclictest0-21swapper/009:11:380
117882750,4sleep0992599cyclictest07:16:260
49962700,1sleep10-21swapper/110:51:461
181352690,2sleep20-21swapper/209:46:542
181352690,2sleep20-21swapper/209:46:542
992599681,51cyclictest11554-21munin-plugin-st07:16:240
992599671,45cyclictest0-21swapper/010:56:240
992599671,32cyclictest0-21swapper/010:36:370
992599671,32cyclictest0-21swapper/010:36:370
992599661,6cyclictest27489-21modprobe12:01:240
9925996541,7cyclictest7950irq/56-dwc_otg_09:11:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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