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2026-04-29 - 23:01

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 Wed Apr 29, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3193021190,6sleep30-21swapper/307:46:323
529221080,5chrt5294-21fschecks_count07:56:141
6085999537,10cyclictest0-21swapper/008:06:200
6085999228,8cyclictest4493-21ssh07:55:560
6085999228,8cyclictest4493-21ssh07:55:560
122012890,12sleep2609299cyclictest08:55:052
6085998721,12cyclictest0-21swapper/007:10:340
608599854,14cyclictest0-21swapper/008:35:330
608599843,40cyclictest0-21swapper/008:37:480
6085997814,11cyclictest0-21swapper/010:15:490
6090997025,18cyclictest22567-21tail09:56:241
6090997025,18cyclictest22567-21tail09:56:241
609299685,54cyclictest0-21swapper/210:16:262
6090996836,9cyclictest9221-21df_abs10:26:041
6090996835,10cyclictest0-21swapper/107:29:061
609399674,57cyclictest0-21swapper/310:06:063
609399673,57cyclictest15553-21mailstats09:46:213
609299673,58cyclictest0-21swapper/208:41:322
248599670,4rtkit-daemon2484-21rtkit-daemon09:02:362
609399664,15cyclictest0-21swapper/310:11:083
6090996635,9cyclictest2655-21hostname08:41:071
6090996625,23cyclictest20184-21rm08:17:251
609299654,55cyclictest0-21swapper/210:23:272
609299654,54cyclictest0-21swapper/209:51:182
609299653,55cyclictest0-21swapper/209:41:232
6090996540,9cyclictest2800-21ls07:51:271
6090996540,9cyclictest2800-21ls07:51:271
6090996538,12cyclictest0-21swapper/109:31:231
6090996537,12cyclictest0-21swapper/107:46:171
6090996519,26cyclictest24415-21cpuspeed06:46:111
609299645,52cyclictest6516-21diskstats08:46:102
609299644,54cyclictest0-21swapper/207:56:092
609299643,54cyclictest0-21swapper/209:45:522
609299642,55cyclictest0-21swapper/208:56:252
6090996438,11cyclictest0-21swapper/108:21:161
609299635,51cyclictest0-21swapper/209:21:062
609299633,54cyclictest0-21swapper/207:46:162
609299633,51cyclictest5838-21crond07:10:572
609299632,53cyclictest0-21swapper/207:16:212
609099635,18cyclictest0-21swapper/108:38:301
6090996339,8cyclictest2513-21udisks-daemon10:11:191
6090996334,11cyclictest0-21swapper/107:07:431
6090996333,13cyclictest0-21swapper/109:11:571
6090996333,10cyclictest0-21swapper/107:17:141
1499826310,9sleep114053-21munin-node09:46:131
609399626,47cyclictest7552-21timerandwakeup08:46:273
609399625,51cyclictest0-21swapper/309:30:523
609399625,27cyclictest0-21swapper/306:45:253
609399624,13cyclictest0-21swapper/308:06:193
6093996221,13cyclictest0-21swapper/309:04:053
609299624,52cyclictest0-21swapper/209:36:462
609299624,52cyclictest0-21swapper/207:26:162
6092996237,9cyclictest31573-21telnet08:36:052
609299623,53cyclictest0-21swapper/206:44:072
609299622,52cyclictest0-21swapper/207:31:122
6090996235,12cyclictest0-21swapper/108:01:171
6090996234,12cyclictest0-21swapper/110:06:021
6090996232,8cyclictest8459-21latency09:36:151
6090996231,12cyclictest26235-21sendmail_mailqu08:26:221
6090996230,12cyclictest0-21swapper/110:20:201
6090996228,15cyclictest0-21swapper/108:33:261
6090996228,12cyclictest0-21swapper/107:23:561
248599620,4rtkit-daemon2484-21rtkit-daemon05:01:152
609399615,27cyclictest0-21swapper/309:55:013
609399615,27cyclictest0-21swapper/307:57:373
609399614,49cyclictest0-21swapper/306:46:213
609399614,28cyclictest0-21swapper/308:55:543
6093996121,13cyclictest0-21swapper/305:01:293
6093996119,13cyclictest26154-21telnet09:16:023
6093996119,13cyclictest26154-21telnet09:16:023
6093996119,13cyclictest0-21swapper/307:35:363
609299614,51cyclictest0-21swapper/209:17:182
609299614,51cyclictest0-21swapper/209:17:182
609299614,50cyclictest0-21swapper/210:11:172
6092996138,8cyclictest24750-21ssh10:01:062
609299613,52cyclictest0-21swapper/209:11:112
609299612,53cyclictest0-21swapper/209:28:022
6090996135,12cyclictest0-21swapper/110:21:141
6090996132,11cyclictest0-21swapper/108:06:251
293762613,12sleep20-21swapper/205:46:352
609399605,27cyclictest0-21swapper/309:11:023
609399605,27cyclictest0-21swapper/307:41:213
609399605,26cyclictest0-21swapper/308:14:253
609399604,27cyclictest0-21swapper/307:55:453
609399604,27cyclictest0-21swapper/307:55:453
609299605,48cyclictest0-21swapper/206:46:112
609299604,50cyclictest0-21swapper/210:26:132
609299604,50cyclictest0-21swapper/208:26:082
609299604,49cyclictest0-21swapper/207:11:142
609299604,49cyclictest0-21swapper/207:11:142
609299604,37cyclictest0-21swapper/205:31:142
6090996027,12cyclictest30919-21processes09:21:201
166052603,10sleep10-21swapper/108:11:351
609399596,24cyclictest24455-21iostat07:36:183
609399595,25cyclictest20794-21munin-node09:56:113
609399595,25cyclictest20794-21munin-node09:56:113
609399594,49cyclictest0-21swapper/305:26:163
609399594,48cyclictest0-21swapper/309:06:223
609399594,11cyclictest0-21swapper/309:25:523
609399594,11cyclictest0-21swapper/306:18:413
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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