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2026-04-23 - 02:59

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 22, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32155552130101,9sleep20-21swapper/207:08:302
32156022122107,10sleep40-21swapper/407:09:114
32153802118104,9sleep70-21swapper/707:06:027
32135452117103,9sleep00-21swapper/007:05:060
32155832116102,9sleep30-21swapper/307:08:543
32154212116101,10sleep10-21swapper/107:06:361
32155592115100,10sleep60-21swapper/607:08:336
3215103211197,9sleep50-21swapper/507:05:195
3215908991030,100cyclictest0-21swapper/510:05:085
321590899102100,1cyclictest553-21snmpd12:37:595
32159039910299,3cyclictest553-21snmpd07:40:074
32159009910298,3cyclictest553-21snmpd09:54:293
3215916991010,100cyclictest0-21swapper/709:40:357
3215916991010,0cyclictest0-21swapper/711:34:247
32159129910199,1cyclictest553-21snmpd11:11:266
321591299101100,1cyclictest553-21snmpd11:47:036
321591299101100,1cyclictest553-21snmpd11:21:206
32159089910199,2cyclictest553-21snmpd07:39:075
32159089910199,1cyclictest553-21snmpd11:49:455
32159089910198,3cyclictest3357421-21cat10:20:145
32159089910196,0cyclictest553-21snmpd11:59:515
3215908991010,100cyclictest0-21swapper/511:18:055
32159039910199,2cyclictest553-21snmpd12:20:044
32159039910198,3cyclictest553-21snmpd12:19:104
32159039910198,3cyclictest553-21snmpd11:00:494
32159039910198,3cyclictest553-21snmpd08:42:064
32159039910198,3cyclictest553-21snmpd08:32:504
3215903991010,0cyclictest0-21swapper/411:45:364
3215896991010,100cyclictest0-21swapper/211:10:502
3215896991010,100cyclictest0-21swapper/207:37:372
32158929910199,2cyclictest553-21snmpd09:08:101
32158929910198,3cyclictest553-21snmpd10:13:031
32158929910197,3cyclictest553-21snmpd08:37:571
3215892991010,99cyclictest0-21swapper/108:57:001
3215892991010,101cyclictest0-21swapper/111:23:441
3215892991010,100cyclictest0-21swapper/111:37:151
3215892991010,0cyclictest0-21swapper/109:01:091
3215916991000,99cyclictest0-21swapper/712:01:527
3215916991000,100cyclictest0-21swapper/710:23:547
3215916991000,100cyclictest0-21swapper/707:30:157
3215916991000,100cyclictest0-21swapper/707:19:157
32159129910099,1cyclictest553-21snmpd10:15:156
32159129910099,1cyclictest553-21snmpd09:59:566
3215912991000,99cyclictest0-21swapper/611:52:126
3215912991000,99cyclictest0-21swapper/607:24:516
3215912991000,100cyclictest0-21swapper/612:22:346
32159089910099,1cyclictest553-21snmpd11:43:065
32159089910099,1cyclictest553-21snmpd11:28:175
32159089910099,1cyclictest553-21snmpd11:07:115
32159089910099,1cyclictest553-21snmpd11:04:055
32159089910099,1cyclictest553-21snmpd10:49:255
32159089910099,1cyclictest553-21snmpd09:27:375
32159089910099,1cyclictest553-21snmpd09:23:285
32159089910099,1cyclictest553-21snmpd07:34:015
32159089910099,1cyclictest553-21snmpd07:24:425
32159089910098,2cyclictest553-21snmpd09:32:345
32159089910097,3cyclictest553-21snmpd10:01:205
3215908991000,99cyclictest0-21swapper/512:06:315
3215908991000,100cyclictest0-21swapper/511:39:065
3215908991000,100cyclictest0-21swapper/509:03:155
32159039910099,1cyclictest553-21snmpd10:49:044
32159039910098,2cyclictest553-21snmpd10:08:184
3215903991000,99cyclictest3277845-21diskmemload11:17:264
3215903991000,100cyclictest0-21swapper/412:34:354
3215903991000,100cyclictest0-21swapper/411:24:534
3215903991000,100cyclictest0-21swapper/408:38:574
32159009910099,1cyclictest553-21snmpd10:40:193
32159009910099,1cyclictest553-21snmpd08:16:293
32159009910099,1cyclictest553-21snmpd07:21:423
32159009910098,1cyclictest570-21ntpd09:56:573
32158969910099,1cyclictest553-21snmpd11:03:512
32158969910099,1cyclictest553-21snmpd10:58:282
32158969910099,1cyclictest553-21snmpd10:12:302
32158969910099,1cyclictest553-21snmpd08:44:452
32158969910098,2cyclictest553-21snmpd09:30:042
32158969910098,1cyclictest553-21snmpd11:58:182
3215896991000,99cyclictest0-21swapper/210:01:022
3215896991000,99cyclictest0-21swapper/208:24:472
3215896991000,99cyclictest0-21swapper/207:44:582
3215896991000,100cyclictest0-21swapper/211:25:142
3215896991000,100cyclictest0-21swapper/209:27:252
32158929910099,1cyclictest553-21snmpd09:39:591
32158929910099,1cyclictest0-21swapper/110:53:101
32158929910099,1cyclictest0-21swapper/110:53:101
3215892991000,99cyclictest0-21swapper/111:07:021
3215892991000,99cyclictest0-21swapper/110:58:071
3215892991000,99cyclictest0-21swapper/109:15:581
3215892991000,99cyclictest0-21swapper/107:24:571
3215892991000,100cyclictest0-21swapper/110:07:261
32158899910099,1cyclictest553-21snmpd10:34:030
32158899910099,1cyclictest553-21snmpd08:50:360
32158899910099,1cyclictest553-21snmpd08:45:330
32158899910099,1cyclictest553-21snmpd08:23:540
32158899910099,1cyclictest553-21snmpd07:51:370
3215889991000,99cyclictest0-21swapper/010:49:040
3215889991000,99cyclictest0-21swapper/009:34:520
3215889991000,99cyclictest0-21swapper/009:05:140
3215889991000,99cyclictest0-21swapper/008:32:530
3215889991000,99cyclictest0-21swapper/008:03:400
3215889991000,99cyclictest0-21swapper/007:57:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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