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2026-07-23 - 09:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Thu Jul 23, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20540991043,92cyclictest18374-21gltestperf21:13:311
20541991003,28cyclictest24593-21ssh23:08:062
2054199995,27cyclictest0-21swapper/223:13:422
2054199984,69cyclictest0-21swapper/222:11:182
20541999611,21cyclictest0-21swapper/221:58:432
20541999610,22cyclictest0-21swapper/222:21:022
2054199955,29cyclictest0-21swapper/220:38:382
2054199954,27cyclictest0-21swapper/221:33:432
2054099953,85cyclictest0-21swapper/122:31:181
2054199947,24cyclictest0-21swapper/223:38:222
2054199944,29cyclictest0-21swapper/219:43:392
2054199944,27cyclictest0-21swapper/219:18:272
2054199943,29cyclictest0-21swapper/222:13:422
2054199933,71cyclictest0-21swapper/222:43:082
2054199933,27cyclictest0-21swapper/221:23:352
2054199933,27cyclictest0-21swapper/221:23:352
2054099933,83cyclictest18820-21df_abs22:58:221
2054199928,25cyclictest0-21swapper/222:33:222
2054199924,79cyclictest0-21swapper/219:53:332
2054199923,28cyclictest0-21swapper/221:29:182
2054199923,28cyclictest0-21swapper/221:29:182
20541999225,8cyclictest13873-21aten_r1power_cu23:43:172
2054199915,26cyclictest0-21swapper/222:58:252
2054099917,20cyclictest0-21swapper/121:33:261
233822900,12sleep12054099cyclictest23:03:411
2054199904,29cyclictest0-21swapper/220:43:462
2054199904,27cyclictest0-21swapper/223:23:282
2054199904,27cyclictest0-21swapper/223:23:282
2054199904,24cyclictest14747-21munin-run22:53:072
2054199904,23cyclictest877-21dbus-daemon20:23:142
20541999020,13cyclictest0-21swapper/220:28:442
2054099904,12cyclictest0-21swapper/122:12:081
219499890,5rtkit-daemon2193-21rtkit-daemon19:18:283
219499890,23rtkit-daemon2193-21rtkit-daemon20:08:263
219499890,23rtkit-daemon2193-21rtkit-daemon20:08:263
2054199894,78cyclictest0-21swapper/221:48:402
2054199894,26cyclictest0-21swapper/223:11:442
2054199894,25cyclictest0-21swapper/221:43:482
2054099894,25cyclictest0-21swapper/123:31:331
2054099894,24cyclictest0-21swapper/121:25:341
2054099894,24cyclictest0-21swapper/121:25:341
2054099894,24cyclictest0-21swapper/120:26:561
2054099894,23cyclictest0-21swapper/121:45:171
2054099894,21cyclictest0-21swapper/123:19:241
2054099893,79cyclictest0-21swapper/123:13:391
2054199884,77cyclictest0-21swapper/219:48:272
2054199884,27cyclictest0-21swapper/222:31:062
20541998820,13cyclictest0-21swapper/222:55:402
2054099884,40cyclictest15002-21python20:18:441
2054099884,39cyclictest0-21swapper/122:21:591
2054099884,24cyclictest0-21swapper/121:42:161
2054099884,12cyclictest0-21swapper/120:49:131
2054099884,12cyclictest0-21swapper/120:49:131
20540998833,49cyclictest3665-21gltestperf18:48:371
20540998833,49cyclictest3665-21gltestperf18:48:371
2054099883,77cyclictest0-21swapper/119:00:311
2054099883,40cyclictest0-21swapper/123:33:151
2054099883,39cyclictest22738-21ssh21:19:061
2054199878,25cyclictest0-21swapper/223:21:502
2054199874,29cyclictest0-21swapper/219:38:382
2054199874,12cyclictest0-21swapper/223:28:222
2054199873,25cyclictest0-21swapper/222:25:172
20541998721,12cyclictest0-21swapper/222:43:402
20541998721,12cyclictest0-21swapper/222:43:402
2054099874,34cyclictest0-21swapper/121:03:451
2054099874,21cyclictest0-21swapper/122:27:041
2054099873,41cyclictest7877-21munin-node21:53:211
2054099873,29cyclictest0-21swapper/122:56:291
2054199864,28cyclictest0-21swapper/221:10:142
2054199864,10cyclictest7349-21crond20:58:122
2054099864,38cyclictest0-21swapper/123:23:171
2054099864,38cyclictest0-21swapper/123:23:171
2054099863,35cyclictest0-21swapper/121:08:161
2054199856,25cyclictest0-21swapper/221:54:142
2054199854,26cyclictest21809-21ssh21:18:342
2054199854,23cyclictest0-21swapper/220:33:412
20541998510,10cyclictest1227-21runrttasks20:49:442
20541998510,10cyclictest1227-21runrttasks20:49:442
2054099854,38cyclictest7700-21ssh20:58:231
2054099854,37cyclictest0-21swapper/122:39:491
2054099854,35cyclictest23203-21ssh22:14:491
2054099854,21cyclictest0-21swapper/123:45:591
2054099853,42cyclictest19161-21taskset19:21:491
2054099853,36cyclictest0-21swapper/122:03:301
2054099853,36cyclictest0-21swapper/122:03:301
2054099853,35cyclictest31296-21needreboot20:43:391
20540998518,9cyclictest1124-21snmpd18:25:011
2054199845,26cyclictest0-21swapper/223:33:332
2054199844,71cyclictest0-21swapper/221:03:362
2054199844,31cyclictest0-21swapper/221:00:352
2054199844,26cyclictest0-21swapper/221:13:262
20541998412,15cyclictest0-21swapper/222:03:222
20541998412,15cyclictest0-21swapper/222:03:222
2054099846,22cyclictest0-21swapper/120:30:351
2054099844,22cyclictest0-21swapper/123:38:281
2054099843,26cyclictest0-21swapper/120:03:131
2054199834,13cyclictest0-21swapper/221:41:372
2054199833,27cyclictest5396-21sshd19:58:482
20541998321,11cyclictest1124-21snmpd20:22:232
2054099834,36cyclictest0-21swapper/120:53:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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