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2026-06-26 - 17:17

OSADL QA Farm on Real-time of Mainline Linux

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

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.
Unexpectedly long latencies may be caused by SMIs
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 100 highest latencies:
System rackbslot8s (updated Fri Jun 26, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
309052119105,9sleep10-21swapper/107:08:511
307322119108,6sleep50-21swapper/507:06:245
308142118103,10sleep40-21swapper/407:07:354
288662116102,9sleep70-21swapper/707:05:057
30843211398,10sleep60-21swapper/607:08:016
30765211298,9sleep20-21swapper/207:06:522
30969211095,10sleep00-21swapper/007:09:460
30840210994,9sleep30-21swapper/307:07:573
312429910399,4cyclictest323283-21cat12:35:146
312189910399,4cyclictest553-21snmpd10:50:470
3121899103100,3cyclictest553-21snmpd09:56:220
312429910299,3cyclictest553-21snmpd12:28:106
312429910299,3cyclictest553-21snmpd11:08:026
3124099102100,2cyclictest553-21snmpd09:43:265
31226991020,0cyclictest0-21swapper/211:02:582
3122399102100,2cyclictest553-21snmpd12:15:521
31246991010,100cyclictest0-21swapper/707:52:197
31242991010,99cyclictest0-21swapper/608:03:156
31242991010,101cyclictest0-21swapper/612:12:236
31242991010,100cyclictest0-21swapper/609:26:126
31242991010,100cyclictest0-21swapper/607:49:256
31242991010,0cyclictest0-21swapper/612:33:596
31242991010,0cyclictest0-21swapper/607:31:306
312409910198,2cyclictest553-21snmpd12:01:395
31240991010,100cyclictest0-21swapper/509:04:065
312359910199,2cyclictest553-21snmpd11:39:504
312359910199,2cyclictest553-21snmpd11:39:504
312359910199,2cyclictest553-21snmpd09:33:264
31235991010,100cyclictest0-21swapper/412:07:374
31235991010,100cyclictest0-21swapper/409:10:154
312319910199,2cyclictest553-21snmpd11:48:343
312319910199,2cyclictest553-21snmpd10:56:263
312269910199,2cyclictest553-21snmpd10:55:022
312269910199,2cyclictest553-21snmpd07:11:432
312269910198,2cyclictest553-21snmpd07:48:162
31226991010,99cyclictest0-21swapper/208:36:142
31218991010,100cyclictest0-21swapper/010:31:360
31218991010,100cyclictest0-21swapper/009:22:310
31246991000,99cyclictest0-21swapper/711:48:547
31246991000,99cyclictest0-21swapper/711:27:447
31246991000,100cyclictest0-21swapper/712:37:057
31246991000,100cyclictest0-21swapper/708:51:097
31246991000,100cyclictest0-21swapper/708:44:487
312429910099,1cyclictest553-21snmpd11:40:596
312429910099,1cyclictest553-21snmpd07:15:436
312429910099,1cyclictest0-21swapper/609:36:116
312429910098,2cyclictest553-21snmpd11:38:036
312429910098,2cyclictest553-21snmpd11:38:026
312429910098,2cyclictest553-21snmpd09:04:336
31242991000,99cyclictest0-21swapper/608:15:236
31242991000,100cyclictest0-21swapper/609:16:016
312409910099,1cyclictest553-21snmpd11:31:125
312409910099,1cyclictest553-21snmpd11:09:145
312409910099,1cyclictest553-21snmpd10:24:305
312409910099,1cyclictest553-21snmpd09:54:495
312409910099,1cyclictest553-21snmpd08:00:065
312409910099,1cyclictest45542-21cat07:35:135
312409910098,2cyclictest553-21snmpd12:32:325
312409910098,2cyclictest553-21snmpd09:55:465
312409910098,2cyclictest553-21snmpd09:35:475
312409910098,1cyclictest553-21snmpd11:16:025
31240991000,99cyclictest0-21swapper/510:54:375
31240991000,99cyclictest0-21swapper/510:42:485
31240991000,99cyclictest0-21swapper/508:27:135
31240991000,1cyclictest0-21swapper/510:32:135
31240991000,100cyclictest0-21swapper/512:12:595
31240991000,100cyclictest0-21swapper/511:12:225
31240991000,100cyclictest0-21swapper/509:11:525
31240991000,100cyclictest0-21swapper/508:57:385
31240991000,100cyclictest0-21swapper/508:40:155
312359910099,1cyclictest553-21snmpd12:24:134
312359910099,1cyclictest553-21snmpd10:45:094
312359910099,1cyclictest553-21snmpd10:31:494
312359910099,1cyclictest553-21snmpd09:04:374
312359910099,1cyclictest553-21snmpd08:22:134
312359910099,1cyclictest553-21snmpd07:16:254
312359910099,1cyclictest278818-21cat11:55:134
31235991000,99cyclictest0-21swapper/409:25:334
31235991000,99cyclictest0-21swapper/408:13:594
31235991000,99cyclictest0-21swapper/407:20:234
31235991000,1cyclictest0-21swapper/410:53:024
31235991000,100cyclictest0-21swapper/411:44:374
31235991000,100cyclictest0-21swapper/407:45:524
312319910099,1cyclictest553-21snmpd08:47:263
312319910099,1cyclictest553-21snmpd07:58:423
312319910099,1cyclictest553-21snmpd07:35:023
312319910098,2cyclictest553-21snmpd11:06:403
312319910097,3cyclictest553-21snmpd11:58:303
312269910099,1cyclictest553-21snmpd10:39:332
312269910098,2cyclictest553-21snmpd12:34:182
312269910098,2cyclictest553-21snmpd10:52:592
312269910098,2cyclictest553-21snmpd08:15:162
312269910098,2cyclictest553-21snmpd07:56:302
31226991000,99cyclictest0-21swapper/212:26:172
31226991000,99cyclictest0-21swapper/212:09:052
31226991000,99cyclictest0-21swapper/207:39:332
31226991000,100cyclictest0-21swapper/210:08:562
31226991000,100cyclictest0-21swapper/209:40:132
31226991000,100cyclictest0-21swapper/208:40:142
312239910099,1cyclictest553-21snmpd10:42:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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