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2026-05-17 - 18:40

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 Sun May 17, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30981292121106,10sleep30-21swapper/307:05:023
3100168212090,10sleep20-21swapper/207:08:542
31000722116102,9sleep70-21swapper/707:07:307
30999492116101,10sleep50-21swapper/507:05:445
30987602113100,8sleep10-21swapper/107:05:161
3100118211298,9sleep60-21swapper/607:08:106
3100018211096,9sleep00-21swapper/007:06:430
3100134210793,9sleep40-21swapper/407:08:244
31004919910399,3cyclictest553-21snmpd10:05:554
31004919910399,3cyclictest553-21snmpd10:05:544
31004739910399,3cyclictest553-21snmpd11:41:130
3100491991020,101cyclictest0-21swapper/411:47:244
3100491991020,101cyclictest0-21swapper/409:13:084
3100491991020,100cyclictest0-21swapper/410:16:254
31004739910299,3cyclictest3107272-21cat07:20:140
310047399102100,1cyclictest553-21snmpd09:12:490
3100502991010,101cyclictest0-21swapper/708:42:017
3100502991010,100cyclictest0-21swapper/711:42:197
3100498991010,100cyclictest0-21swapper/612:18:596
3100498991010,100cyclictest0-21swapper/609:40:166
31004949910199,2cyclictest553-21snmpd12:12:445
31004949910199,2cyclictest553-21snmpd10:10:045
3100494991010,100cyclictest0-21swapper/512:25:145
31004919910198,3cyclictest553-21snmpd12:12:284
31004829910199,2cyclictest553-21snmpd12:02:172
3100482991010,101cyclictest0-21swapper/211:56:322
3100482991010,101cyclictest0-21swapper/211:29:342
3100482991010,101cyclictest0-21swapper/210:54:022
3100482991010,100cyclictest0-21swapper/210:00:482
3100482991010,100cyclictest0-21swapper/210:00:482
3100478991010,100cyclictest0-21swapper/107:24:311
3100478991010,100cyclictest0-21swapper/107:19:521
3100473991010,100cyclictest0-21swapper/011:37:400
3100473991010,0cyclictest0-21swapper/008:18:570
31005029910099,1cyclictest0-21swapper/712:02:237
31005029910099,1cyclictest0-21swapper/710:20:257
3100502991000,100cyclictest0-21swapper/711:31:527
3100502991000,100cyclictest0-21swapper/709:18:507
3100502991000,100cyclictest0-21swapper/708:47:547
31004989910099,1cyclictest553-21snmpd12:23:056
31004989910099,1cyclictest553-21snmpd07:55:446
31004989910099,1cyclictest3286663-21cat11:00:156
3100498991000,99cyclictest0-21swapper/611:05:156
3100498991000,100cyclictest0-21swapper/612:05:446
3100498991000,100cyclictest0-21swapper/609:15:446
31004949910099,1cyclictest553-21snmpd11:13:095
31004949910099,1cyclictest553-21snmpd11:06:305
31004949910099,1cyclictest553-21snmpd10:50:045
31004949910099,1cyclictest553-21snmpd08:52:375
31004949910099,1cyclictest553-21snmpd08:43:455
31004949910099,1cyclictest553-21snmpd08:06:565
31004949910099,1cyclictest553-21snmpd07:57:295
31004949910099,1cyclictest553-21snmpd07:24:165
31004949910099,1cyclictest0-21swapper/510:04:015
31004949910099,1cyclictest0-21swapper/510:04:015
31004949910098,1cyclictest553-21snmpd08:22:425
3100494991000,99cyclictest0-21swapper/509:23:115
3100494991000,99cyclictest0-21swapper/508:55:015
3100494991000,100cyclictest0-21swapper/511:26:005
3100494991000,100cyclictest0-21swapper/510:37:385
31004919910099,1cyclictest553-21snmpd10:27:464
31004919910099,1cyclictest553-21snmpd09:40:184
31004919910099,1cyclictest553-21snmpd07:58:384
31004919910098,2cyclictest553-21snmpd09:19:264
31004919910097,3cyclictest553-21snmpd12:34:394
3100491991000,99cyclictest0-21swapper/408:37:234
3100491991000,99cyclictest0-21swapper/408:13:214
3100491991000,0cyclictest0-21swapper/411:51:104
31004879910099,1cyclictest553-21snmpd11:20:153
31004879910099,1cyclictest553-21snmpd10:36:593
31004879910099,1cyclictest553-21snmpd10:33:023
31004879910099,1cyclictest553-21snmpd10:21:163
31004879910099,1cyclictest553-21snmpd09:58:183
31004879910099,1cyclictest553-21snmpd09:19:383
31004879910099,1cyclictest553-21snmpd08:26:153
31004879910099,1cyclictest553-21snmpd08:07:173
31004879910099,1cyclictest553-21snmpd08:04:563
31004879910099,1cyclictest553-21snmpd07:41:313
3100487991000,100cyclictest0-21swapper/309:40:163
31004829910099,1cyclictest553-21snmpd11:16:382
31004829910099,1cyclictest3297764-21cat11:10:162
31004829910098,2cyclictest553-21snmpd09:45:082
31004829910098,2cyclictest553-21snmpd08:27:332
3100482991000,99cyclictest0-21swapper/212:32:152
3100482991000,99cyclictest0-21swapper/210:55:532
3100482991000,99cyclictest0-21swapper/208:35:182
3100482991000,99cyclictest0-21swapper/207:20:162
3100482991000,100cyclictest0-21swapper/211:08:212
31004789910099,1cyclictest553-21snmpd08:52:491
31004789910099,1cyclictest553-21snmpd08:39:551
31004789910099,1cyclictest553-21snmpd08:02:201
31004789910099,1cyclictest3156083-21cat08:55:151
31004789910098,1cyclictest553-21snmpd07:45:411
3100478991000,99cyclictest0-21swapper/112:14:051
3100478991000,99cyclictest0-21swapper/111:32:131
3100478991000,99cyclictest0-21swapper/111:15:541
3100478991000,99cyclictest0-21swapper/109:07:281
3100478991000,99cyclictest0-21swapper/108:20:091
3100478991000,99cyclictest0-21swapper/108:08:581
3100478991000,100cyclictest0-21swapper/112:38:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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