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2026-04-29 - 04:44

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 Apr 29, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26859422116102,9sleep20-21swapper/219:06:212
268644699115114,1cyclictest2754424-21kworker/6:022:09:366
26860852115101,9sleep50-21swapper/519:08:255
26860032115101,9sleep60-21swapper/619:07:146
2686030211398,10sleep40-21swapper/419:07:354
2685989211399,9sleep10-21swapper/119:07:001
2686172211298,9sleep70-21swapper/719:09:407
2686089211298,9sleep00-21swapper/019:08:280
2686056210591,9sleep30-21swapper/319:07:583
26864319910399,3cyclictest553-21snmpd23:15:572
2686450991020,99cyclictest0-21swapper/721:20:477
2686441991020,99cyclictest0-21swapper/500:09:525
2686431991020,99cyclictest0-21swapper/200:35:392
2686431991020,100cyclictest0-21swapper/219:22:012
26864419910198,3cyclictest553-21snmpd23:52:595
26864419910198,3cyclictest553-21snmpd22:38:145
268644199101100,1cyclictest0-21swapper/522:15:045
2686441991010,100cyclictest0-21swapper/520:59:225
26864389910199,2cyclictest553-21snmpd00:29:174
2686438991010,100cyclictest0-21swapper/422:19:194
2686438991010,100cyclictest0-21swapper/422:00:334
26864349910199,2cyclictest553-21snmpd00:03:523
26864349910199,1cyclictest553-21snmpd23:10:023
268643499101100,1cyclictest553-21snmpd22:21:103
26864319910199,2cyclictest553-21snmpd23:22:012
26864319910199,2cyclictest553-21snmpd23:14:472
26864319910199,2cyclictest553-21snmpd23:05:032
2686431991010,101cyclictest0-21swapper/223:35:062
2686431991010,100cyclictest0-21swapper/223:33:102
26864269910199,2cyclictest553-21snmpd22:50:291
26864269910199,2cyclictest553-21snmpd00:37:301
2686426991010,99cyclictest0-21swapper/120:27:451
2686426991010,101cyclictest0-21swapper/123:03:151
2686426991010,101cyclictest0-21swapper/100:08:321
2686426991010,100cyclictest0-21swapper/100:18:461
2686426991010,0cyclictest0-21swapper/122:19:061
268642199101100,1cyclictest553-21snmpd20:55:340
26864509910099,1cyclictest0-21swapper/700:15:567
2686450991000,99cyclictest0-21swapper/722:30:117
2686450991000,99cyclictest0-21swapper/721:33:007
2686450991000,1cyclictest0-21swapper/723:01:327
2686450991000,100cyclictest0-21swapper/723:10:037
2686450991000,100cyclictest0-21swapper/721:19:507
26864469910099,1cyclictest553-21snmpd23:23:186
26864469910099,1cyclictest553-21snmpd22:17:586
26864469910099,1cyclictest553-21snmpd22:01:546
26864469910099,1cyclictest553-21snmpd21:15:326
26864469910099,1cyclictest553-21snmpd20:55:586
26864469910099,1cyclictest553-21snmpd00:21:366
26864469910099,1cyclictest2673733-21kworker/6:219:15:126
2686446991000,99cyclictest0-21swapper/620:17:236
26864419910099,1cyclictest553-21snmpd20:43:045
26864419910099,1cyclictest553-21snmpd19:38:595
26864419910099,1cyclictest553-21snmpd19:38:585
26864419910098,2cyclictest553-21snmpd23:31:345
26864419910098,2cyclictest553-21snmpd21:54:045
26864419910097,3cyclictest553-21snmpd23:20:205
26864419910097,3cyclictest553-21snmpd20:28:045
26864419910097,3cyclictest553-21snmpd20:13:265
26864419910097,3cyclictest553-21snmpd19:48:315
26864419910097,3cyclictest553-21snmpd19:48:315
2686441991000,99cyclictest0-21swapper/521:48:515
2686441991000,99cyclictest0-21swapper/521:28:305
2686441991000,99cyclictest0-21swapper/519:40:205
2686441991000,99cyclictest0-21swapper/519:40:205
2686441991000,99cyclictest0-21swapper/519:25:525
26864389910099,1cyclictest553-21snmpd23:51:504
26864389910099,1cyclictest553-21snmpd23:19:474
26864389910099,1cyclictest553-21snmpd22:58:094
26864389910099,1cyclictest553-21snmpd22:43:414
26864389910099,1cyclictest553-21snmpd22:25:194
26864389910099,1cyclictest553-21snmpd21:23:294
26864389910099,1cyclictest553-21snmpd19:46:554
26864389910099,1cyclictest553-21snmpd19:46:554
26864389910099,1cyclictest553-21snmpd19:22:584
2686438991000,100cyclictest0-21swapper/421:45:144
2686438991000,100cyclictest0-21swapper/421:07:384
2686438991000,100cyclictest0-21swapper/400:30:154
26864349910099,1cyclictest553-21snmpd23:36:103
26864349910099,1cyclictest553-21snmpd23:01:333
26864349910099,1cyclictest553-21snmpd19:57:263
26864349910098,2cyclictest553-21snmpd22:52:503
26864319910099,1cyclictest553-21snmpd23:00:422
26864319910099,1cyclictest553-21snmpd22:12:522
26864319910099,1cyclictest553-21snmpd19:30:062
26864319910098,2cyclictest553-21snmpd20:36:312
26864319910098,2cyclictest553-21snmpd19:28:452
2686431991000,99cyclictest0-21swapper/221:47:332
2686431991000,99cyclictest0-21swapper/219:16:432
2686431991000,99cyclictest0-21swapper/200:25:392
2686431991000,100cyclictest0-21swapper/222:27:222
2686431991000,100cyclictest0-21swapper/220:55:042
26864269910099,1cyclictest553-21snmpd20:09:391
26864269910099,1cyclictest553-21snmpd00:27:211
26864269910098,1cyclictest553-21snmpd19:35:051
26864269910098,1cyclictest553-21snmpd19:35:051
26864269910097,3cyclictest553-21snmpd19:50:111
2686426991000,99cyclictest0-21swapper/122:38:531
2686426991000,99cyclictest0-21swapper/122:25:501
2686426991000,100cyclictest0-21swapper/123:12:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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