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2023-09-23 - 22:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #2

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by a total of 2 SMIs that occured during the measurement.
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 rack8slot2s.osadl.org (updated Sat Sep 23, 2023 00:43:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
306599139131,7cyclictest0-21swapper/119:11:411
1836521050,0sleep10-21swapper/122:36:591
306499104102,1cyclictest0-21swapper/019:11:410
325112950,0sleep30-21swapper/322:50:483
93529441,39sleep20-21swapper/219:07:032
270429147,32sleep00-21swapper/019:10:300
273729047,32sleep30-21swapper/319:10:583
253428945,32sleep10-21swapper/119:08:191
149412880,0sleep10-21swapper/123:36:231
145532830,0sleep00-21swapper/000:39:350
3067997270,1cyclictest0-21swapper/319:20:533
3064994926,22cyclictest0-21swapper/023:56:550
3066994644,1cyclictest0-21swapper/219:20:532
302162330,0chrt0-21swapper/221:12:392
106992310,0sleep30-21swapper/321:27:073
193702300,1sleep30-21swapper/319:42:113
271922280,0sleep30-21swapper/321:42:343
271922280,0sleep30-21swapper/321:42:343
306499250,23cyclictest19306-21sh22:06:590
163882250,0sleep30-21swapper/322:02:543
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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