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2026-03-18 - 07:09

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 Wed Mar 18, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32857782125110,9sleep10-21swapper/119:07:011
32858382122108,9sleep20-21swapper/219:07:502
32858482119105,9sleep30-21swapper/319:07:593
3285774211789,23sleep60-21swapper/619:06:576
3285738211499,10sleep40-21swapper/419:06:484
3285651211499,10sleep00-21swapper/019:05:320
3285649211499,9sleep70-21swapper/719:05:317
3285647210692,9sleep50-21swapper/519:05:295
3286304991020,99cyclictest0-21swapper/400:09:084
3286304991020,100cyclictest0-21swapper/423:39:134
3286304991020,0cyclictest0-21swapper/422:36:244
3286298991020,101cyclictest0-21swapper/222:12:152
32862899910299,3cyclictest553-21snmpd00:39:480
32862899910299,2cyclictest553-21snmpd21:19:160
3286289991020,102cyclictest0-21swapper/022:41:160
3286289991020,100cyclictest0-21swapper/020:56:150
32863129910199,2cyclictest553-21snmpd22:46:446
32863129910199,2cyclictest553-21snmpd21:36:416
32863129910198,3cyclictest553-21snmpd23:05:386
32863129910198,3cyclictest553-21snmpd19:14:386
32863129910198,3cyclictest553-21snmpd00:08:206
3286312991010,101cyclictest0-21swapper/623:39:376
3286312991010,101cyclictest0-21swapper/622:15:216
32863099910199,2cyclictest553-21snmpd21:10:075
328630999101100,1cyclictest553-21snmpd23:29:245
32863049910198,3cyclictest553-21snmpd20:52:514
32863049910198,3cyclictest553-21snmpd20:52:504
32863049910198,3cyclictest3416314-21cat22:10:164
32863049910198,2cyclictest553-21snmpd20:24:054
3286304991010,100cyclictest0-21swapper/421:19:494
3286304991010,0cyclictest0-21swapper/419:15:414
328630299101100,1cyclictest553-21snmpd22:37:253
3286298991010,101cyclictest0-21swapper/219:34:572
3286298991010,101cyclictest0-21swapper/200:32:232
3286298991010,101cyclictest0-21swapper/200:32:232
3286298991010,100cyclictest0-21swapper/220:07:562
3286298991010,0cyclictest0-21swapper/220:34:062
3286293991010,100cyclictest0-21swapper/120:15:551
32862899910198,3cyclictest553-21snmpd22:27:130
3286289991010,100cyclictest0-21swapper/022:22:100
3286289991010,100cyclictest0-21swapper/000:13:020
3286289991010,0cyclictest0-21swapper/023:03:110
3286317991000,99cyclictest0-21swapper/723:25:547
3286317991000,99cyclictest0-21swapper/721:33:267
3286317991000,99cyclictest0-21swapper/720:56:117
3286317991000,99cyclictest0-21swapper/720:52:247
3286317991000,99cyclictest0-21swapper/720:52:247
3286317991000,99cyclictest0-21swapper/719:45:077
3286317991000,99cyclictest0-21swapper/719:10:477
3286317991000,100cyclictest0-21swapper/723:54:197
3286317991000,100cyclictest0-21swapper/723:15:507
3286317991000,100cyclictest0-21swapper/722:37:347
3286317991000,100cyclictest0-21swapper/722:31:017
3286317991000,100cyclictest0-21swapper/722:16:567
3286317991000,100cyclictest0-21swapper/700:10:177
32863129910099,1cyclictest553-21snmpd21:01:076
32863129910099,1cyclictest553-21snmpd20:05:436
32863129910099,1cyclictest553-21snmpd19:33:066
32863129910099,1cyclictest553-21snmpd00:26:476
32863129910099,1cyclictest553-21snmpd00:18:476
3286312991000,99cyclictest3303424-21strings19:40:156
32863099910099,1cyclictest553-21snmpd23:36:055
32863099910099,1cyclictest553-21snmpd22:32:105
32863099910099,1cyclictest553-21snmpd21:02:105
32863099910099,1cyclictest553-21snmpd20:33:145
32863099910099,1cyclictest553-21snmpd20:16:415
32863099910099,1cyclictest553-21snmpd19:53:285
32863099910099,1cyclictest553-21snmpd19:11:025
3286309991000,99cyclictest0-21swapper/523:00:325
3286309991000,99cyclictest0-21swapper/521:22:525
3286309991000,99cyclictest0-21swapper/521:05:075
3286309991000,99cyclictest0-21swapper/519:46:435
3286309991000,100cyclictest0-21swapper/523:57:525
3286309991000,100cyclictest0-21swapper/522:03:305
3286309991000,100cyclictest0-21swapper/520:42:425
32863049910099,1cyclictest553-21snmpd23:15:424
32863049910099,1cyclictest553-21snmpd20:55:484
32863049910099,1cyclictest553-21snmpd19:10:384
32863049910099,1cyclictest3365849-21cat21:25:124
32863049910097,3cyclictest553-21snmpd23:53:104
3286304991000,99cyclictest0-21swapper/419:38:484
3286304991000,100cyclictest0-21swapper/422:47:174
3286304991000,100cyclictest0-21swapper/421:56:274
3286304991000,100cyclictest0-21swapper/400:10:134
3286304991000,100cyclictest0-21swapper/400:00:154
32863029910099,1cyclictest553-21snmpd23:27:183
32863029910099,1cyclictest553-21snmpd23:06:083
32863029910099,1cyclictest553-21snmpd22:58:323
32863029910099,1cyclictest553-21snmpd22:49:353
32863029910099,1cyclictest553-21snmpd22:11:063
32863029910099,1cyclictest553-21snmpd21:44:203
32863029910099,1cyclictest553-21snmpd21:08:253
32863029910099,1cyclictest553-21snmpd20:22:553
32863029910099,1cyclictest553-21snmpd19:47:493
32863029910099,1cyclictest553-21snmpd00:29:023
32863029910099,1cyclictest553-21snmpd00:15:473
32862989910099,1cyclictest553-21snmpd20:43:542
32862989910098,2cyclictest553-21snmpd19:56:252
32862989910097,3cyclictest553-21snmpd00:37:452
3286298991000,1cyclictest3347608-21diskmemload23:28:532
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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