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2024-11-22 - 06:02

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 Nov 22, 2024 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12772900,4chrt0-21swapper/319:21:123
12772900,4chrt0-21swapper/319:21:123
238782810,2sleep30-21swapper/323:11:143
313872800,3chrt0-21swapper/322:06:053
315242730,2sleep331200-21kworker/3:2+events19:16:053
164962730,9sleep016500-21latency_hist00:21:050
164962730,9sleep016500-21latency_hist00:21:050
164962730,9sleep016500-21latency_hist00:21:050
71432670,4sleep17140-21apt-get23:56:141
71432670,4sleep17140-21apt-get23:56:141
315592660,3sleep031537-21ls19:16:070
94622630,2chrt0-21swapper/322:31:263
94622630,2chrt0-21swapper/322:31:263
31772996237,22cyclictest0-21swapper/000:06:110
31772996237,22cyclictest0-21swapper/000:06:110
145832600,3sleep20-21swapper/221:21:182
145832600,3sleep20-21swapper/221:21:182
90862590,3sleep20-21swapper/222:31:212
90862590,3sleep20-21swapper/222:31:212
3177299572,46cyclictest12786-21taskset19:51:180
246602560,3sleep20-21swapper/220:21:252
246602560,3sleep20-21swapper/220:21:252
78392540,1sleep10-21swapper/123:56:231
78392540,1sleep10-21swapper/123:56:231
31772995235,13cyclictest15765-21snmpd00:26:170
31772995235,13cyclictest15765-21snmpd00:26:170
31772995142,4cyclictest0-21swapper/019:56:180
31772995142,4cyclictest0-21swapper/019:56:180
49732500,3sleep10-21swapper/123:46:211
49732500,3sleep10-21swapper/123:46:211
31772994823,17cyclictest171ktimers/019:31:170
31772994823,17cyclictest171ktimers/019:31:170
273212480,2sleep20-21swapper/220:26:312
273212480,2sleep20-21swapper/220:26:312
204612470,2chrt20464-21gltestperf21:36:251
204612470,2chrt20464-21gltestperf21:36:251
31772994619,5cyclictest30624-21timerandwakeup23:26:310
31772994619,5cyclictest30624-21timerandwakeup23:26:310
242632460,2sleep024264-21latency_hist00:41:110
242632460,2sleep024264-21latency_hist00:41:110
243622450,2sleep30-21swapper/320:21:223
243622450,2sleep30-21swapper/320:21:223
225212450,2chrt0-21swapper/100:36:221
225212450,2chrt0-21swapper/100:36:221
241392440,3sleep20-21swapper/223:11:212
241392440,3sleep20-21swapper/223:11:212
31772994318,4cyclictest8129-21grep21:01:280
31772994318,4cyclictest8129-21grep21:01:280
31772994317,5cyclictest31563-21latency_hist22:06:120
269112430,3sleep30-21swapper/320:26:283
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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