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2026-03-27 - 16:03

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 Fri Mar 27, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3508142122107,10sleep30-21swapper/307:07:333
3506882122109,8sleep50-21swapper/507:05:445
3509482121107,9sleep40-21swapper/407:09:284
350664212091,10sleep10-21swapper/107:05:231
3508932119105,9sleep60-21swapper/607:08:426
3509622116102,9sleep70-21swapper/707:09:397
3507212116102,9sleep20-21swapper/207:06:122
350802211096,9sleep00-21swapper/007:07:220
3512229910399,4cyclictest553-21snmpd12:31:072
3512189910399,4cyclictest553-21snmpd10:45:071
351241991020,100cyclictest0-21swapper/708:04:097
3512229910299,3cyclictest553-21snmpd12:26:222
3512229910299,3cyclictest553-21snmpd12:21:372
3512229910299,3cyclictest553-21snmpd09:02:182
3512229910299,3cyclictest553-21snmpd07:22:202
3512229910299,3cyclictest553-21snmpd07:22:192
3512189910298,4cyclictest553-21snmpd10:39:411
351213991020,101cyclictest0-21swapper/008:15:130
351241991010,0cyclictest0-21swapper/707:26:087
3512339910199,2cyclictest553-21snmpd10:13:375
3512339910198,2cyclictest553-21snmpd09:33:005
3512299910199,2cyclictest553-21snmpd11:19:594
3512299910198,3cyclictest553-21snmpd12:38:344
3512299910198,3cyclictest553-21snmpd10:59:584
3512299910198,3cyclictest553-21snmpd10:26:054
35122999101100,1cyclictest476801-21cat10:05:144
351229991010,100cyclictest0-21swapper/408:59:504
351229991010,100cyclictest0-21swapper/408:15:144
3512279910199,2cyclictest553-21snmpd10:03:353
35122799101100,1cyclictest553-21snmpd09:53:223
3512229910199,2cyclictest553-21snmpd09:45:572
351222991010,101cyclictest0-21swapper/209:26:282
351222991010,0cyclictest0-21swapper/210:01:432
3512189910199,2cyclictest553-21snmpd12:20:221
351218991010,101cyclictest0-21swapper/109:39:091
351218991010,100cyclictest0-21swapper/111:44:001
3512139910199,2cyclictest0-21swapper/010:28:590
3512139910199,1cyclictest553-21snmpd10:37:290
351241991000,99cyclictest0-21swapper/712:32:317
351241991000,99cyclictest0-21swapper/712:13:077
351241991000,99cyclictest0-21swapper/711:19:347
351241991000,99cyclictest0-21swapper/707:35:537
351241991000,100cyclictest0-21swapper/709:46:497
351241991000,100cyclictest0-21swapper/709:35:157
3512379910099,1cyclictest553-21snmpd12:35:356
3512379910099,1cyclictest553-21snmpd08:26:126
3512379910099,1cyclictest553-21snmpd08:07:126
3512379910099,1cyclictest0-21swapper/609:44:106
351237991000,99cyclictest0-21swapper/610:35:516
351237991000,99cyclictest0-21swapper/608:59:476
351237991000,99cyclictest0-21swapper/608:02:186
351237991000,100cyclictest0-21swapper/612:26:096
351237991000,100cyclictest0-21swapper/611:11:046
351237991000,0cyclictest0-21swapper/610:09:146
3512339910099,1cyclictest553-21snmpd12:22:155
3512339910099,1cyclictest553-21snmpd10:22:535
3512339910099,1cyclictest553-21snmpd09:39:285
3512339910099,1cyclictest376586-21cat07:55:145
351233991000,99cyclictest0-21swapper/508:00:565
351233991000,99cyclictest0-21swapper/507:12:135
351233991000,100cyclictest0-21swapper/511:13:345
3512299910098,2cyclictest553-21snmpd11:11:494
3512299910098,2cyclictest553-21snmpd09:48:134
3512299910098,2cyclictest0-21swapper/410:52:224
3512299910097,3cyclictest553-21snmpd08:06:484
351229991000,99cyclictest0-21swapper/408:12:224
351229991000,100cyclictest0-21swapper/412:24:304
351229991000,100cyclictest0-21swapper/411:22:534
351229991000,100cyclictest0-21swapper/410:20:504
351229991000,100cyclictest0-21swapper/409:18:174
351229991000,100cyclictest0-21swapper/407:42:124
351229991000,100cyclictest0-21swapper/407:34:564
3512279910099,1cyclictest553-21snmpd11:56:473
3512279910099,1cyclictest553-21snmpd11:56:473
3512279910099,1cyclictest553-21snmpd11:46:183
3512279910099,1cyclictest553-21snmpd11:27:553
3512279910099,1cyclictest553-21snmpd10:33:213
3512279910099,1cyclictest553-21snmpd09:43:573
3512279910099,1cyclictest553-21snmpd09:36:393
3512279910099,1cyclictest553-21snmpd08:49:253
3512279910099,1cyclictest553-21snmpd08:37:293
3512279910099,1cyclictest553-21snmpd08:18:093
3512279910099,1cyclictest553-21snmpd07:51:083
3512279910098,2cyclictest553-21snmpd09:47:403
3512279910098,1cyclictest553-21snmpd10:05:253
3512229910099,1cyclictest553-21snmpd08:36:382
3512229910099,1cyclictest553-21snmpd07:17:052
3512229910099,1cyclictest553-21snmpd07:17:042
3512229910098,2cyclictest553-21snmpd12:11:062
3512229910098,2cyclictest553-21snmpd11:55:562
3512229910098,2cyclictest553-21snmpd11:55:562
3512229910097,3cyclictest553-21snmpd10:26:362
351222991000,100cyclictest0-21swapper/211:41:512
351222991000,100cyclictest0-21swapper/209:59:022
351222991000,100cyclictest0-21swapper/208:20:122
351222991000,100cyclictest0-21swapper/207:56:202
351222991000,0cyclictest0-21swapper/210:17:082
3512189910099,1cyclictest553-21snmpd10:50:551
3512189910097,3cyclictest553-21snmpd08:34:471
3512189910096,4cyclictest553-21snmpd11:32:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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