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2025-12-03 - 00:04

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 Tue Dec 02, 2025 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
399601799182182,0cyclictest0-21swapper/508:37:025
39955362135107,9sleep50-21swapper/507:06:235
39957012133102,9sleep40-21swapper/407:08:474
39954772131115,10sleep20-21swapper/207:05:332
39956572129114,10sleep70-21swapper/707:08:107
39956892125110,10sleep10-21swapper/107:08:371
39955552125109,10sleep60-21swapper/607:06:416
39956052123110,8sleep00-21swapper/007:07:230
39955232120105,10sleep30-21swapper/307:06:133
39960209910299,3cyclictest3437785-21snmpd10:45:486
3996020991020,100cyclictest0-21swapper/609:17:246
3996017991020,102cyclictest0-21swapper/512:35:315
39960089910299,3cyclictest3437785-21snmpd09:08:393
39959969910299,3cyclictest3437785-21snmpd10:46:251
3995996991020,0cyclictest0-21swapper/111:30:171
39959929910299,3cyclictest3437785-21snmpd10:33:330
3995992991020,100cyclictest0-21swapper/011:17:460
3996024991010,101cyclictest0-21swapper/709:26:487
3996024991010,101cyclictest0-21swapper/707:46:377
3996024991010,0cyclictest0-21swapper/708:49:477
39960209910199,2cyclictest3437785-21snmpd09:36:346
39960209910198,3cyclictest3437785-21snmpd09:52:296
39960179910199,1cyclictest3437785-21snmpd11:43:535
399601799101100,1cyclictest3437785-21snmpd08:14:475
3996017991010,100cyclictest0-21swapper/510:16:325
3996017991010,100cyclictest0-21swapper/510:16:325
3996017991010,0cyclictest0-21swapper/509:01:215
39960049910199,2cyclictest3437785-21snmpd12:32:462
39960049910199,2cyclictest3437785-21snmpd11:11:492
39960049910199,1cyclictest3437785-21snmpd07:59:182
39959969910199,2cyclictest3437785-21snmpd08:40:111
39959969910199,2cyclictest3437785-21snmpd08:30:491
3995992991010,99cyclictest0-21swapper/011:44:560
3995992991010,99cyclictest0-21swapper/007:22:080
3995992991010,100cyclictest0-21swapper/010:44:580
3995992991010,100cyclictest0-21swapper/009:54:100
3995992991010,100cyclictest0-21swapper/009:26:570
3995992991010,100cyclictest0-21swapper/007:53:120
3996024991000,99cyclictest0-21swapper/710:50:367
3996024991000,99cyclictest0-21swapper/707:29:297
3996024991000,100cyclictest0-21swapper/710:58:347
39960209910099,1cyclictest62603-21cat12:35:176
39960209910099,1cyclictest3437785-21snmpd08:28:166
39960209910098,2cyclictest3437785-21snmpd07:20:516
3996020991000,99cyclictest0-21swapper/609:45:586
3996020991000,99cyclictest0-21swapper/608:41:146
3996020991000,99cyclictest0-21swapper/608:00:456
3996020991000,1cyclictest0-21swapper/610:38:376
3996020991000,100cyclictest0-21swapper/611:58:016
3996020991000,100cyclictest0-21swapper/609:55:146
39960179910099,1cyclictest3437785-21snmpd12:22:015
39960179910099,1cyclictest3437785-21snmpd11:47:005
39960179910099,1cyclictest3437785-21snmpd10:20:145
39960179910099,1cyclictest3437785-21snmpd07:53:155
39960179910099,1cyclictest3437785-21snmpd07:14:405
39960179910099,1cyclictest0-21swapper/510:35:155
39960179910098,1cyclictest597-21lldpd07:41:535
39960179910097,3cyclictest3437785-21snmpd11:32:205
3996017991000,100cyclictest0-21swapper/510:45:155
3996017991000,100cyclictest0-21swapper/508:46:415
3996017991000,100cyclictest0-21swapper/507:55:205
39960139910099,1cyclictest3437785-21snmpd11:17:464
39960139910099,1cyclictest3437785-21snmpd10:58:114
39960139910099,1cyclictest3437785-21snmpd10:44:574
39960139910099,1cyclictest3437785-21snmpd10:39:304
39960139910099,1cyclictest3437785-21snmpd10:29:334
39960139910099,1cyclictest3437785-21snmpd07:49:214
39960139910099,1cyclictest3437785-21snmpd07:13:534
39960139910099,1cyclictest0-21swapper/409:20:284
3996013991000,99cyclictest0-21swapper/411:23:144
3996013991000,99cyclictest0-21swapper/409:32:034
3996013991000,99cyclictest0-21swapper/408:08:194
39960089910099,1cyclictest3437785-21snmpd11:05:223
39960089910099,1cyclictest3437785-21snmpd09:12:063
39960089910098,2cyclictest3437785-21snmpd08:09:343
39960089910098,2cyclictest3437785-21snmpd07:28:443
39960049910099,1cyclictest3437785-21snmpd10:53:192
39960049910099,1cyclictest3437785-21snmpd10:48:462
39960049910099,1cyclictest3437785-21snmpd09:17:222
39960049910099,1cyclictest3437785-21snmpd07:21:442
39960049910099,1cyclictest17583-21cat11:50:162
39960049910098,2cyclictest3437785-21snmpd10:55:152
3996004991000,1cyclictest0-21swapper/212:14:162
3996004991000,1cyclictest0-21swapper/211:35:382
3996004991000,100cyclictest0-21swapper/211:03:402
3996004991000,100cyclictest0-21swapper/210:04:262
3996004991000,100cyclictest0-21swapper/209:42:562
39959969910099,1cyclictest3437785-21snmpd11:56:151
39959969910099,1cyclictest3437785-21snmpd09:55:011
39959969910099,1cyclictest3437785-21snmpd09:15:431
39959969910099,1cyclictest3437785-21snmpd07:35:201
39959969910097,3cyclictest3437785-21snmpd10:22:151
39959969910097,3cyclictest3437785-21snmpd10:15:501
39959969910097,3cyclictest3437785-21snmpd10:15:501
39959969910097,3cyclictest3437785-21snmpd08:02:401
3995996991000,99cyclictest0-21swapper/109:20:031
3995996991000,100cyclictest0-21swapper/107:40:171
3995996991000,100cyclictest0-21swapper/107:22:381
39959929910099,1cyclictest3437785-21snmpd08:22:350
39959929910099,1cyclictest3437785-21snmpd08:09:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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