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2026-04-29 - 17:30

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 Apr 29, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3619507212695,9sleep40-21swapper/407:05:254
36197352120105,10sleep50-21swapper/507:08:395
3619751211788,9sleep30-21swapper/307:08:543
36195232115100,10sleep00-21swapper/007:05:390
3619727211487,22sleep60-21swapper/607:08:326
3619759211399,9sleep20-21swapper/207:09:012
3619589211399,9sleep10-21swapper/107:06:361
3619557211399,9sleep70-21swapper/707:06:107
3620077991030,100cyclictest0-21swapper/611:24:236
36200779910299,0cyclictest553-21snmpd11:36:246
3620077991020,99cyclictest0-21swapper/608:35:516
3620077991020,102cyclictest0-21swapper/612:30:536
36200699910299,3cyclictest553-21snmpd09:22:344
362006599102100,2cyclictest553-21snmpd09:32:373
3620061991020,1cyclictest0-21swapper/211:39:502
3620061991020,100cyclictest0-21swapper/209:41:292
36200779910199,2cyclictest553-21snmpd10:51:536
36200779910197,1cyclictest553-21snmpd08:34:366
3620077991010,99cyclictest0-21swapper/609:47:356
36200749910199,1cyclictest553-21snmpd08:01:405
362007499101100,1cyclictest553-21snmpd12:06:485
36200699910199,2cyclictest553-21snmpd09:59:594
36200699910199,2cyclictest553-21snmpd07:52:364
36200699910198,3cyclictest553-21snmpd10:24:004
362006999101100,1cyclictest553-21snmpd12:00:574
3620069991010,99cyclictest0-21swapper/409:07:484
3620069991010,101cyclictest0-21swapper/412:15:294
3620069991010,100cyclictest0-21swapper/412:28:054
3620069991010,100cyclictest0-21swapper/410:08:364
36200659910198,2cyclictest553-21snmpd07:15:303
36200619910199,2cyclictest553-21snmpd09:11:492
36200619910198,3cyclictest553-21snmpd10:33:402
3620061991010,99cyclictest0-21swapper/209:03:152
3620061991010,99cyclictest0-21swapper/208:34:182
3620061991010,101cyclictest0-21swapper/212:13:322
3620061991010,101cyclictest0-21swapper/211:30:032
3620061991010,101cyclictest0-21swapper/210:05:062
3620061991010,101cyclictest0-21swapper/209:23:302
3620061991010,100cyclictest0-21swapper/211:21:392
36200579910199,2cyclictest553-21snmpd10:29:311
36200549910199,2cyclictest553-21snmpd12:26:280
36200549910199,2cyclictest553-21snmpd08:06:340
3620054991010,101cyclictest0-21swapper/009:48:580
3620054991010,100cyclictest0-21swapper/007:53:490
36200779910099,1cyclictest553-21snmpd11:52:196
36200779910099,1cyclictest553-21snmpd10:00:566
36200779910098,2cyclictest553-21snmpd11:47:306
36200779910097,1cyclictest553-21snmpd10:18:366
36200779910097,1cyclictest553-21snmpd08:22:166
36200779910097,1cyclictest553-21snmpd07:59:156
3620077991000,99cyclictest0-21swapper/610:27:426
3620077991000,99cyclictest0-21swapper/609:35:136
3620077991000,99cyclictest0-21swapper/607:35:426
36200749910099,1cyclictest553-21snmpd12:04:345
36200749910099,1cyclictest553-21snmpd10:27:035
36200749910099,1cyclictest553-21snmpd10:19:245
36200749910099,1cyclictest553-21snmpd09:56:265
36200749910099,1cyclictest553-21snmpd08:56:245
36200749910099,1cyclictest553-21snmpd08:56:245
36200749910098,2cyclictest553-21snmpd12:31:565
36200749910098,2cyclictest553-21snmpd09:05:305
3620074991000,99cyclictest0-21swapper/512:16:475
3620074991000,99cyclictest0-21swapper/507:26:035
3620074991000,100cyclictest0-21swapper/511:15:145
3620074991000,100cyclictest0-21swapper/510:32:095
3620074991000,100cyclictest0-21swapper/510:04:595
36200699910099,1cyclictest553-21snmpd12:20:504
36200699910099,1cyclictest553-21snmpd11:51:254
36200699910099,1cyclictest553-21snmpd11:11:204
36200699910099,1cyclictest553-21snmpd10:52:104
36200699910099,1cyclictest553-21snmpd10:14:244
36200699910099,1cyclictest553-21snmpd08:30:474
36200699910099,1cyclictest3832306-21cat11:25:144
36200699910098,2cyclictest553-21snmpd10:57:404
36200699910098,2cyclictest553-21snmpd09:53:324
36200699910097,3cyclictest3667470-21cat08:40:144
3620069991000,100cyclictest0-21swapper/411:23:274
3620069991000,100cyclictest0-21swapper/409:38:354
3620069991000,100cyclictest0-21swapper/408:10:054
3620069991000,100cyclictest0-21swapper/407:45:314
3620069991000,100cyclictest0-21swapper/407:41:134
36200659910099,1cyclictest570-21ntpd12:06:563
36200659910099,1cyclictest553-21snmpd11:49:583
36200659910099,1cyclictest553-21snmpd11:25:153
36200659910099,1cyclictest553-21snmpd08:14:383
36200619910099,1cyclictest553-21snmpd07:44:312
3620061991000,99cyclictest0-21swapper/208:49:242
3620061991000,99cyclictest0-21swapper/208:20:382
3620061991000,100cyclictest0-21swapper/212:17:502
3620061991000,100cyclictest0-21swapper/212:03:212
3620061991000,100cyclictest0-21swapper/211:46:402
3620061991000,100cyclictest0-21swapper/209:50:162
36200579910099,1cyclictest553-21snmpd11:41:361
36200579910099,1cyclictest553-21snmpd07:46:271
36200579910099,1cyclictest553-21snmpd07:41:371
36200579910099,1cyclictest3669983-21cat08:45:151
36200579910099,1cyclictest0-21swapper/112:01:421
3620057991000,99cyclictest3681382-21diskmemload11:17:301
3620057991000,99cyclictest0-21swapper/111:51:221
3620057991000,99cyclictest0-21swapper/111:29:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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