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2026-03-20 - 05:44

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 Fri Mar 20, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29088992129102,22sleep20-21swapper/219:08:472
29088232120106,9sleep00-21swapper/019:07:400
29087612116101,10sleep50-21swapper/519:06:495
29087192115101,9sleep10-21swapper/119:06:131
2908875211399,9sleep70-21swapper/719:08:277
2908927211283,9sleep30-21swapper/319:09:123
2908959211196,10sleep60-21swapper/619:09:396
2908901210894,9sleep40-21swapper/419:08:494
29092289910598,3cyclictest553-21snmpd23:00:484
29092289910399,3cyclictest553-21snmpd23:41:184
29092359910299,3cyclictest553-21snmpd23:10:036
29092359910299,3cyclictest553-21snmpd00:14:146
29092359910298,4cyclictest553-21snmpd22:56:116
29092359910297,5cyclictest553-21snmpd00:29:516
2909235991020,101cyclictest2971160-21diskmemload22:00:346
2909228991020,100cyclictest0-21swapper/419:11:014
29092209910299,2cyclictest553-21snmpd23:57:352
2909220991020,101cyclictest0-21swapper/223:29:282
290923599101100,1cyclictest553-21snmpd00:03:056
29092339910198,2cyclictest553-21snmpd00:28:395
290923399101100,1cyclictest553-21snmpd22:56:145
29092289910199,2cyclictest553-21snmpd23:53:174
29092289910199,2cyclictest553-21snmpd22:25:524
29092289910199,2cyclictest553-21snmpd22:05:404
29092289910199,2cyclictest553-21snmpd22:01:044
29092289910199,2cyclictest553-21snmpd21:16:114
29092289910199,2cyclictest553-21snmpd20:31:554
29092289910198,3cyclictest553-21snmpd22:53:474
2909228991010,99cyclictest0-21swapper/421:05:384
2909228991010,101cyclictest0-21swapper/422:45:354
29092249910199,2cyclictest553-21snmpd23:40:483
290922499101100,1cyclictest553-21snmpd23:27:433
290922499101100,1cyclictest553-21snmpd22:02:553
29092209910199,2cyclictest553-21snmpd21:37:262
2909216991010,100cyclictest0-21swapper/121:35:511
2909216991010,100cyclictest0-21swapper/120:47:281
2909216991010,100cyclictest0-21swapper/100:07:561
2909211991010,100cyclictest0-21swapper/021:15:200
2909211991010,100cyclictest0-21swapper/020:00:160
29092399910098,2cyclictest0-21swapper/722:35:327
2909239991000,99cyclictest0-21swapper/720:56:227
2909239991000,99cyclictest0-21swapper/719:50:027
2909239991000,99cyclictest0-21swapper/719:21:347
2909239991000,100cyclictest0-21swapper/723:47:557
2909239991000,100cyclictest0-21swapper/721:53:057
29092359910099,1cyclictest553-21snmpd20:25:036
29092359910099,1cyclictest553-21snmpd20:24:506
29092359910099,1cyclictest2910288-21cat19:10:146
29092359910098,2cyclictest553-21snmpd22:54:496
29092359910098,2cyclictest553-21snmpd21:07:236
2909235991000,100cyclictest0-21swapper/622:14:226
29092339910099,1cyclictest553-21snmpd23:12:185
29092339910099,1cyclictest553-21snmpd21:00:115
29092339910099,1cyclictest553-21snmpd19:48:295
29092339910099,1cyclictest3071985-21cat22:40:145
29092339910099,1cyclictest0-21swapper/523:00:215
29092339910098,2cyclictest553-21snmpd00:23:095
2909233991000,100cyclictest0-21swapper/500:00:145
29092289910099,1cyclictest553-21snmpd22:31:204
29092289910098,2cyclictest553-21snmpd23:59:204
29092289910098,2cyclictest553-21snmpd23:29:014
29092289910098,2cyclictest553-21snmpd21:55:304
29092289910097,3cyclictest553-21snmpd00:15:414
2909228991000,99cyclictest0-21swapper/422:36:384
2909228991000,99cyclictest0-21swapper/420:00:274
2909228991000,100cyclictest0-21swapper/423:45:374
2909228991000,100cyclictest0-21swapper/423:34:134
2909228991000,100cyclictest0-21swapper/421:13:104
2909228991000,100cyclictest0-21swapper/420:27:434
2909228991000,0cyclictest0-21swapper/423:23:484
29092249910099,1cyclictest553-21snmpd23:48:283
29092249910099,1cyclictest553-21snmpd23:20:573
29092249910099,1cyclictest553-21snmpd23:12:203
29092249910099,1cyclictest553-21snmpd22:31:143
29092249910099,1cyclictest553-21snmpd21:41:303
29092249910099,1cyclictest553-21snmpd20:16:303
29092249910098,2cyclictest553-21snmpd23:55:443
29092209910099,1cyclictest553-21snmpd23:10:422
29092209910099,1cyclictest553-21snmpd21:58:552
29092209910099,1cyclictest553-21snmpd20:40:432
29092209910099,1cyclictest553-21snmpd19:55:062
29092209910098,2cyclictest553-21snmpd23:36:272
2909220991000,99cyclictest0-21swapper/223:45:072
2909220991000,99cyclictest0-21swapper/221:16:502
2909220991000,99cyclictest0-21swapper/219:25:532
2909220991000,1cyclictest0-21swapper/200:02:502
2909220991000,100cyclictest0-21swapper/223:32:422
2909220991000,100cyclictest0-21swapper/223:09:142
2909220991000,100cyclictest0-21swapper/222:41:592
29092169910099,1cyclictest553-21snmpd21:49:121
29092169910099,1cyclictest553-21snmpd20:43:341
29092169910099,1cyclictest553-21snmpd19:31:351
29092169910099,1cyclictest0-21swapper/122:46:231
2909216991000,99cyclictest0-21swapper/122:16:401
2909216991000,99cyclictest0-21swapper/122:04:271
2909216991000,99cyclictest0-21swapper/121:41:391
2909216991000,99cyclictest0-21swapper/120:22:121
2909216991000,100cyclictest0-21swapper/122:41:171
2909216991000,100cyclictest0-21swapper/121:31:421
2909216991000,100cyclictest0-21swapper/121:31:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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