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2026-08-05 - 05:50

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 Aug 04, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2438640212091,10sleep60-21swapper/607:06:006
24388982118102,10sleep20-21swapper/207:09:422
24388362117104,8sleep50-21swapper/507:08:485
24387492115100,10sleep30-21swapper/307:07:343
24387192115101,9sleep00-21swapper/007:07:070
24387142115101,9sleep40-21swapper/407:07:034
2438646211399,9sleep10-21swapper/107:06:041
243917799108107,1cyclictest2493355-21kworker/6:212:18:226
2439161991060,103cyclictest0-21swapper/209:52:042
2439161991060,103cyclictest0-21swapper/209:52:042
2438753210489,10sleep70-21swapper/707:07:377
2439161991030,100cyclictest0-21swapper/212:02:292
2439181991020,99cyclictest0-21swapper/710:10:147
2439161991020,102cyclictest0-21swapper/210:28:482
2439161991020,100cyclictest0-21swapper/211:35:012
2439181991010,99cyclictest0-21swapper/707:55:217
2439181991010,101cyclictest0-21swapper/711:27:317
2439181991010,0cyclictest0-21swapper/711:00:407
24391779910199,2cyclictest553-21snmpd10:06:206
2439177991010,99cyclictest0-21swapper/610:53:366
24391729910199,2cyclictest553-21snmpd11:01:555
2439172991010,100cyclictest0-21swapper/510:33:515
24391649910199,2cyclictest553-21snmpd10:02:263
24391649910199,2cyclictest553-21snmpd07:10:333
24391649910198,3cyclictest553-21snmpd11:51:003
243916499101100,1cyclictest553-21snmpd12:13:183
243916499101100,1cyclictest553-21snmpd08:16:253
24391619910198,3cyclictest553-21snmpd11:13:372
2439161991010,0cyclictest0-21swapper/211:58:112
24391589910199,1cyclictest553-21snmpd09:27:091
24391539910198,2cyclictest553-21snmpd10:36:440
2439153991011,99cyclictest0-21swapper/008:58:540
2439153991010,101cyclictest0-21swapper/009:59:560
24391819910098,2cyclictest0-21swapper/711:37:147
2439181991000,99cyclictest0-21swapper/710:57:397
2439181991000,99cyclictest0-21swapper/710:45:407
2439181991000,100cyclictest0-21swapper/710:39:247
2439181991000,100cyclictest0-21swapper/709:34:377
2439181991000,100cyclictest0-21swapper/709:07:497
24391779910099,1cyclictest553-21snmpd12:25:406
24391779910099,1cyclictest553-21snmpd08:41:186
24391779910099,1cyclictest553-21snmpd08:31:206
2439177991000,99cyclictest0-21swapper/612:22:046
2439177991000,99cyclictest0-21swapper/610:45:246
2439177991000,100cyclictest0-21swapper/611:51:266
2439177991000,100cyclictest0-21swapper/609:39:106
24391729910099,1cyclictest553-21snmpd11:05:245
24391729910099,1cyclictest553-21snmpd10:19:415
24391729910099,1cyclictest553-21snmpd09:05:075
24391729910099,1cyclictest553-21snmpd08:35:185
24391729910099,1cyclictest553-21snmpd08:34:595
24391729910099,1cyclictest553-21snmpd08:08:355
24391729910099,1cyclictest553-21snmpd07:33:245
24391729910099,1cyclictest553-21snmpd07:18:095
243917299100100,0cyclictest553-21snmpd10:43:585
2439172991000,100cyclictest0-21swapper/508:45:135
2439172991000,100cyclictest0-21swapper/508:10:165
24391699910099,1cyclictest553-21snmpd11:24:174
24391699910099,1cyclictest553-21snmpd10:39:154
24391699910099,1cyclictest553-21snmpd10:26:084
24391699910099,1cyclictest553-21snmpd08:25:404
24391699910099,1cyclictest553-21snmpd07:41:374
2439169991000,99cyclictest0-21swapper/411:39:254
2439169991000,99cyclictest0-21swapper/407:36:054
2439169991000,99cyclictest0-21swapper/407:27:124
2439169991000,100cyclictest0-21swapper/410:42:204
2439169991000,100cyclictest0-21swapper/410:24:504
2439169991000,100cyclictest0-21swapper/408:31:574
2439169991000,100cyclictest0-21swapper/407:20:084
24391649910099,1cyclictest553-21snmpd11:19:143
24391649910099,1cyclictest553-21snmpd11:14:243
24391649910099,1cyclictest553-21snmpd09:24:403
24391649910099,1cyclictest553-21snmpd09:06:573
24391649910099,1cyclictest553-21snmpd08:42:503
24391649910098,2cyclictest553-21snmpd10:47:453
24391649910098,2cyclictest553-21snmpd09:40:033
24391649910097,3cyclictest553-21snmpd11:30:253
24391649910097,3cyclictest553-21snmpd10:38:123
24391619910099,1cyclictest553-21snmpd12:12:122
24391619910099,1cyclictest553-21snmpd10:45:182
24391619910098,2cyclictest553-21snmpd11:51:362
24391619910098,2cyclictest553-21snmpd09:38:242
2439161991000,100cyclictest0-21swapper/211:25:372
2439161991000,100cyclictest0-21swapper/211:15:152
2439161991000,100cyclictest0-21swapper/210:24:542
24391589910099,1cyclictest553-21snmpd10:33:511
24391589910098,2cyclictest2471482-21cat08:10:151
24391539910099,1cyclictest553-21snmpd12:11:000
24391539910099,1cyclictest553-21snmpd11:29:460
24391539910099,1cyclictest553-21snmpd11:21:460
24391539910099,1cyclictest553-21snmpd08:12:460
24391539910098,1cyclictest553-21snmpd09:17:070
2439153991000,99cyclictest0-21swapper/011:30:070
2439153991000,99cyclictest0-21swapper/008:52:360
2439153991000,99cyclictest0-21swapper/007:34:010
243918199990,99cyclictest0-21swapper/712:01:307
243918199990,99cyclictest0-21swapper/710:30:387
243918199990,99cyclictest0-21swapper/708:22:357
243918199990,99cyclictest0-21swapper/707:51:377
243918199990,98cyclictest0-21swapper/712:17:217
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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