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2024-04-20 - 00:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 - Rack #f/#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.

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 50 highest latencies:
System rack4slot1s.osadl.org (updated Fri Apr 19, 2024 12:43:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
579921070,2sleep00-21swapper/012:12:450
579921070,2sleep00-21swapper/012:12:450
3023121070,3sleep30-21swapper/307:32:303
3023121070,3sleep30-21swapper/307:32:303
171722950,3sleep017173-21fschecks_time08:22:440
171722950,3sleep017173-21fschecks_time08:22:440
249132750,1sleep2351rcuc/211:37:422
249132750,1sleep2351rcuc/211:37:422
6432680,3sleep00-21swapper/007:37:540
6432680,3sleep00-21swapper/007:37:540
62222650,3chrt0-21swapper/307:52:523
62222650,3chrt0-21swapper/307:52:523
262322650,3sleep30-21swapper/310:12:333
2283499653,48cyclictest32346-21taskset07:37:421
2283499653,48cyclictest32346-21taskset07:37:421
86402620,3sleep30-21swapper/310:52:573
86402620,3sleep30-21swapper/310:52:573
41752620,2chrt0-21swapper/312:07:463
41752620,2chrt0-21swapper/312:07:463
95432600,2sleep09546-21fschecks_count09:27:440
289372590,1sleep028942-21gltestperf07:27:450
289372590,1sleep028942-21gltestperf07:27:450
285052570,3chrt0-21swapper/307:27:363
307102550,2sleep30-21swapper/310:27:323
307102550,2sleep30-21swapper/310:27:323
2283699553,41cyclictest15073-21taskset09:42:423
318012540,3chrt0-21swapper/310:27:563
318012540,3chrt0-21swapper/310:27:563
2283499523,37cyclictest3818-21cut12:07:421
154952510,1sleep015607-21grep12:37:460
36522500,5sleep03653-21latency_hist09:12:360
36522500,5sleep03653-21latency_hist09:12:360
187992500,4sleep30-21swapper/309:52:403
187992500,4sleep30-21swapper/309:52:403
58692480,3chrt0-21swapper/309:17:463
37352470,3sleep30-21swapper/307:47:423
37352470,3sleep30-21swapper/307:47:423
85462460,1sleep00-21swapper/010:52:540
85462460,1sleep00-21swapper/010:52:540
22832994639,5cyclictest36350irq/47-eth008:37:400
22832994639,5cyclictest36350irq/47-eth008:37:400
244042450,2sleep30-21swapper/308:42:373
244042450,2sleep30-21swapper/308:42:373
22834994533,4cyclictest0-21swapper/110:42:421
22834994533,4cyclictest0-21swapper/110:42:421
22834994517,26cyclictest0-21swapper/108:12:411
22832994541,2cyclictest0-21swapper/008:17:430
22832994541,2cyclictest0-21swapper/008:17:430
224092452,9sleep20-21swapper/207:10:142
224092452,9sleep20-21swapper/207:10:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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