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2026-03-11 - 20:18

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 11, 2026 12:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33494972122100,9sleep70-21swapper/707:08:427
33494172118102,10sleep30-21swapper/307:07:353
33494912117102,10sleep10-21swapper/107:08:361
33493332117103,9sleep20-21swapper/207:06:212
3349293211283,9sleep00-21swapper/007:05:460
3349297211197,9sleep40-21swapper/407:05:504
3349364211081,10sleep60-21swapper/607:06:496
3349271210792,10sleep50-21swapper/507:05:275
33498239910399,2cyclictest553-21snmpd09:49:473
33498309910299,3cyclictest553-21snmpd09:58:335
33498309910297,5cyclictest553-21snmpd10:59:275
33498239910299,1cyclictest553-21snmpd12:13:103
33498239910299,1cyclictest553-21snmpd07:18:013
33498339910199,2cyclictest553-21snmpd08:41:556
33498309910199,2cyclictest553-21snmpd09:51:265
33498309910199,2cyclictest553-21snmpd09:31:145
33498309910198,3cyclictest553-21snmpd10:25:575
33498309910197,4cyclictest553-21snmpd12:38:595
3349830991010,99cyclictest0-21swapper/508:03:395
3349830991010,101cyclictest0-21swapper/511:00:175
3349830991010,101cyclictest0-21swapper/508:25:515
3349830991010,100cyclictest0-21swapper/510:17:305
33498269910199,2cyclictest553-21snmpd11:18:384
3349826991010,100cyclictest0-21swapper/412:15:154
33498239910198,1cyclictest553-21snmpd10:04:453
33498239910198,1cyclictest553-21snmpd09:59:003
3349819991010,100cyclictest0-21swapper/211:45:272
334981499101100,1cyclictest553-21snmpd07:18:311
334981499101100,1cyclictest553-21snmpd07:14:341
3349814991010,99cyclictest0-21swapper/109:36:591
33498109910199,2cyclictest553-21snmpd10:42:470
3349810991010,100cyclictest0-21swapper/010:00:140
33498339910099,1cyclictest553-21snmpd10:55:476
33498339910099,1cyclictest553-21snmpd10:00:366
33498339910099,1cyclictest553-21snmpd07:21:596
3349833991000,100cyclictest0-21swapper/612:24:486
3349833991000,100cyclictest0-21swapper/612:11:556
3349833991000,100cyclictest0-21swapper/610:36:416
3349833991000,100cyclictest0-21swapper/610:36:406
33498309910099,1cyclictest553-21snmpd12:05:435
33498309910099,1cyclictest553-21snmpd11:52:025
33498309910099,1cyclictest553-21snmpd10:52:045
33498309910099,1cyclictest553-21snmpd09:10:445
33498309910099,1cyclictest553-21snmpd07:53:055
33498309910099,1cyclictest553-21snmpd07:48:235
33498309910098,2cyclictest553-21snmpd09:49:145
33498309910098,1cyclictest605-21lldpd07:22:205
33498309910098,1cyclictest553-21snmpd08:54:435
3349830991000,99cyclictest0-21swapper/507:35:355
3349830991000,1cyclictest0-21swapper/512:25:595
3349830991000,100cyclictest0-21swapper/511:39:575
3349830991000,100cyclictest0-21swapper/507:15:355
33498269910099,1cyclictest553-21snmpd12:29:114
33498269910099,1cyclictest553-21snmpd11:42:304
33498269910099,1cyclictest553-21snmpd11:27:034
33498269910099,1cyclictest553-21snmpd10:13:254
33498269910099,1cyclictest553-21snmpd07:54:144
33498269910099,1cyclictest553-21snmpd07:22:074
33498269910099,0cyclictest553-21snmpd11:57:344
33498269910098,2cyclictest553-21snmpd08:36:494
3349826991000,99cyclictest0-21swapper/408:25:134
3349826991000,100cyclictest0-21swapper/410:47:344
3349826991000,100cyclictest0-21swapper/409:11:594
33498239910099,1cyclictest553-21snmpd11:16:303
33498239910099,1cyclictest553-21snmpd10:49:383
33498239910099,1cyclictest553-21snmpd08:44:473
33498239910099,1cyclictest553-21snmpd07:37:063
33498239910098,2cyclictest553-21snmpd09:30:063
33498199910099,1cyclictest553-21snmpd11:31:002
33498199910099,1cyclictest553-21snmpd10:37:132
33498199910099,1cyclictest553-21snmpd10:37:132
33498199910099,1cyclictest553-21snmpd10:22:572
33498199910099,1cyclictest553-21snmpd09:29:052
33498199910098,2cyclictest553-21snmpd10:04:432
3349819991000,99cyclictest0-21swapper/208:28:362
3349819991000,100cyclictest0-21swapper/211:59:282
3349819991000,100cyclictest0-21swapper/211:12:292
33498149910099,1cyclictest553-21snmpd09:46:261
33498149910099,1cyclictest553-21snmpd09:25:591
33498149910099,1cyclictest553-21snmpd09:16:051
33498149910099,1cyclictest553-21snmpd08:03:301
3349814991000,99cyclictest0-21swapper/109:20:171
3349814991000,99cyclictest0-21swapper/108:47:401
3349814991000,99cyclictest0-21swapper/107:38:201
3349814991000,100cyclictest0-21swapper/110:53:501
3349814991000,100cyclictest0-21swapper/110:26:101
3349814991000,100cyclictest0-21swapper/109:58:401
3349814991000,100cyclictest0-21swapper/109:51:051
33498109910099,1cyclictest553-21snmpd12:07:050
33498109910099,0cyclictest553-21snmpd10:35:160
33498109910099,0cyclictest553-21snmpd10:35:160
3349810991000,99cyclictest0-21swapper/012:36:300
3349810991000,99cyclictest0-21swapper/012:22:320
3349810991000,99cyclictest0-21swapper/007:27:350
3349810991000,98cyclictest0-21swapper/008:37:070
3349810991000,100cyclictest0-21swapper/012:33:020
334983899990,99cyclictest0-21swapper/712:20:417
334983899990,99cyclictest0-21swapper/712:01:117
334983899990,99cyclictest0-21swapper/709:58:577
334983899990,99cyclictest0-21swapper/709:07:227
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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