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2026-04-13 - 16:20

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 Mon Apr 13, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3286979212999,10sleep10-21swapper/107:07:231
32850492129115,9sleep00-21swapper/007:05:070
32869062121107,9sleep20-21swapper/207:06:202
32868692116101,10sleep30-21swapper/307:05:493
32869492115100,10sleep70-21swapper/707:06:587
32868822115101,9sleep50-21swapper/507:05:595
3286675211398,9sleep60-21swapper/607:05:216
3287164211299,8sleep40-21swapper/407:09:594
3287433991020,100cyclictest0-21swapper/612:33:076
3287433991020,0cyclictest0-21swapper/611:09:196
328742799102100,2cyclictest553-21snmpd12:28:134
328742299102100,2cyclictest553-21snmpd12:32:133
3287419991020,100cyclictest0-21swapper/207:32:022
32874339910199,2cyclictest553-21snmpd12:18:416
32874339910198,2cyclictest553-21snmpd10:22:216
328743399101100,1cyclictest3389576-21cat09:45:156
3287433991010,100cyclictest0-21swapper/608:40:456
32874229910199,2cyclictest553-21snmpd12:22:493
32874229910199,2cyclictest553-21snmpd11:27:323
32874229910199,2cyclictest553-21snmpd10:59:283
328742299101100,1cyclictest553-21snmpd09:20:123
32874199910199,2cyclictest553-21snmpd11:15:292
32874199910199,2cyclictest553-21snmpd07:41:432
32874199910199,1cyclictest553-21snmpd11:26:172
32874199910198,3cyclictest553-21snmpd12:02:212
3287419991010,101cyclictest0-21swapper/211:11:532
3287419991010,101cyclictest0-21swapper/207:45:162
3287419991010,100cyclictest0-21swapper/209:55:482
32874149910199,2cyclictest553-21snmpd11:53:541
32874149910198,3cyclictest553-21snmpd10:42:331
3287414991010,100cyclictest0-21swapper/109:44:131
3287414991010,100cyclictest0-21swapper/107:46:341
3287414991010,0cyclictest0-21swapper/111:31:181
3287438991000,99cyclictest0-21swapper/711:21:337
3287438991000,99cyclictest0-21swapper/708:28:057
3287438991000,99cyclictest0-21swapper/707:26:247
3287438991000,99cyclictest0-21swapper/707:13:137
3287438991000,100cyclictest0-21swapper/712:25:147
3287438991000,100cyclictest0-21swapper/710:18:087
32874339910099,1cyclictest553-21snmpd10:54:496
32874339910098,2cyclictest553-21snmpd11:46:556
32874339910098,2cyclictest553-21snmpd07:38:266
32874339910097,3cyclictest553-21snmpd11:33:476
32874339910097,3cyclictest553-21snmpd10:16:326
3287433991000,99cyclictest0-21swapper/608:56:326
3287433991000,99cyclictest0-21swapper/608:00:156
3287433991000,100cyclictest0-21swapper/611:12:466
3287433991000,100cyclictest0-21swapper/611:02:566
3287433991000,100cyclictest0-21swapper/609:10:156
3287433991000,100cyclictest0-21swapper/608:20:156
32874319910099,1cyclictest553-21snmpd12:05:455
32874319910099,1cyclictest553-21snmpd11:29:205
3287431991000,99cyclictest0-21swapper/511:49:225
3287431991000,99cyclictest0-21swapper/511:40:065
3287431991000,99cyclictest0-21swapper/510:41:425
3287431991000,99cyclictest0-21swapper/508:46:035
3287431991000,100cyclictest0-21swapper/510:18:025
32874279910099,1cyclictest553-21snmpd11:44:434
32874279910099,1cyclictest553-21snmpd10:15:084
32874279910099,1cyclictest553-21snmpd09:31:234
32874279910099,1cyclictest553-21snmpd08:44:574
32874279910099,1cyclictest553-21snmpd08:28:374
32874279910099,1cyclictest553-21snmpd07:35:564
32874279910098,1cyclictest553-21snmpd08:58:354
3287427991000,99cyclictest0-21swapper/412:35:084
3287427991000,99cyclictest0-21swapper/408:24:384
32874229910099,1cyclictest553-21snmpd12:27:373
32874229910099,1cyclictest553-21snmpd11:40:363
32874229910099,1cyclictest553-21snmpd11:21:033
32874229910099,1cyclictest553-21snmpd08:48:503
32874229910099,1cyclictest553-21snmpd08:41:423
32874229910099,1cyclictest553-21snmpd08:23:563
32874229910099,1cyclictest553-21snmpd07:22:363
32874229910098,2cyclictest553-21snmpd12:13:533
32874229910098,2cyclictest553-21snmpd10:22:133
32874199910099,1cyclictest553-21snmpd11:49:182
32874199910099,1cyclictest553-21snmpd10:40:002
32874199910099,1cyclictest553-21snmpd08:39:032
32874199910099,1cyclictest553-21snmpd08:05:362
32874199910099,1cyclictest553-21snmpd07:21:512
32874199910099,1cyclictest3325044-21cat08:20:142
32874199910098,2cyclictest553-21snmpd11:50:152
32874199910098,2cyclictest553-21snmpd08:47:172
3287419991000,99cyclictest0-21swapper/211:34:202
3287419991000,100cyclictest0-21swapper/208:34:572
3287419991000,100cyclictest0-21swapper/208:34:562
32874149910099,1cyclictest553-21snmpd12:11:281
32874149910097,3cyclictest553-21snmpd10:18:121
328741499100100,0cyclictest553-21snmpd08:35:241
3287414991000,99cyclictest0-21swapper/110:59:071
3287414991000,100cyclictest0-21swapper/110:22:581
3287414991000,100cyclictest0-21swapper/110:10:081
3287414991000,100cyclictest0-21swapper/109:56:271
3287414991000,100cyclictest0-21swapper/109:54:571
3287414991000,100cyclictest0-21swapper/109:47:471
32874109910099,1cyclictest553-21snmpd12:01:220
32874109910099,1cyclictest553-21snmpd11:43:510
32874109910099,1cyclictest553-21snmpd11:24:530
32874109910099,1cyclictest553-21snmpd09:02:280
32874109910098,1cyclictest553-21snmpd07:43:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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