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2026-04-24 - 05:42

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 Apr 24, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18644292125107,12sleep60-21swapper/619:06:416
18643522121106,10sleep30-21swapper/319:05:343
18643602116101,10sleep20-21swapper/219:05:412
18643532114100,9sleep40-21swapper/419:05:354
1864638211399,9sleep00-21swapper/019:09:400
1864491211398,10sleep10-21swapper/119:07:321
1864448211399,9sleep70-21swapper/719:06:587
1864495210995,9sleep50-21swapper/519:07:375
18649299910299,0cyclictest553-21snmpd22:51:205
18649299910298,1cyclictest553-21snmpd00:07:475
18649259910299,3cyclictest553-21snmpd23:54:404
18649259910299,3cyclictest553-21snmpd22:52:504
186492599102100,2cyclictest0-21swapper/420:55:434
1864936991010,101cyclictest0-21swapper/721:45:157
1864936991010,101cyclictest0-21swapper/721:42:007
186492999101100,1cyclictest553-21snmpd19:50:055
186492999101100,1cyclictest553-21snmpd19:39:195
1864929991010,100cyclictest0-21swapper/521:24:205
18649259910199,1cyclictest553-21snmpd23:55:074
1864925991010,101cyclictest0-21swapper/422:45:154
1864925991010,101cyclictest0-21swapper/421:01:164
1864925991010,101cyclictest0-21swapper/400:08:054
1864925991010,0cyclictest0-21swapper/422:02:424
1864925991010,0cyclictest0-21swapper/400:18:384
18649219910199,1cyclictest553-21snmpd20:59:123
18649169910199,2cyclictest553-21snmpd22:17:572
1864916991010,100cyclictest0-21swapper/219:54:592
1864912991010,100cyclictest0-21swapper/123:26:361
1864912991010,100cyclictest0-21swapper/122:50:201
1864912991010,100cyclictest0-21swapper/122:34:251
1864912991010,100cyclictest0-21swapper/121:50:271
18649089910199,2cyclictest553-21snmpd21:48:180
18649089910199,2cyclictest553-21snmpd21:30:020
18649089910199,2cyclictest553-21snmpd00:04:230
186490899101100,1cyclictest553-21snmpd23:18:060
1864908991010,100cyclictest0-21swapper/022:45:230
1864908991010,100cyclictest0-21swapper/020:09:560
1864936991000,99cyclictest0-21swapper/720:29:337
1864936991000,99cyclictest0-21swapper/700:22:087
1864936991000,1cyclictest0-21swapper/723:38:317
1864936991000,100cyclictest0-21swapper/723:49:437
1864936991000,0cyclictest0-21swapper/723:54:037
18649329910099,1cyclictest553-21snmpd23:34:106
18649329910099,1cyclictest553-21snmpd20:34:426
18649329910099,1cyclictest553-21snmpd20:08:086
18649329910099,1cyclictest553-21snmpd19:30:166
18649329910099,1cyclictest553-21snmpd00:12:446
18649329910099,1cyclictest1902225-21cat20:20:156
18649329910098,2cyclictest553-21snmpd21:40:326
1864932991000,100cyclictest0-21swapper/623:02:306
1864932991000,100cyclictest0-21swapper/622:00:086
1864932991000,100cyclictest0-21swapper/620:57:526
18649299910099,1cyclictest553-21snmpd23:06:395
18649299910099,1cyclictest553-21snmpd20:35:125
18649299910099,1cyclictest553-21snmpd20:28:155
1864929991000,99cyclictest0-21swapper/523:35:045
1864929991000,99cyclictest0-21swapper/523:11:365
1864929991000,99cyclictest0-21swapper/521:12:505
18649259910099,1cyclictest553-21snmpd21:18:144
18649259910099,1cyclictest553-21snmpd21:10:134
18649259910099,1cyclictest553-21snmpd21:07:524
18649259910099,1cyclictest553-21snmpd19:58:534
18649259910099,1cyclictest553-21snmpd00:23:564
18649259910098,2cyclictest553-21snmpd23:33:194
18649259910098,1cyclictest553-21snmpd22:57:294
1864925991000,99cyclictest0-21swapper/420:01:574
1864925991000,99cyclictest0-21swapper/419:51:574
1864925991000,99cyclictest0-21swapper/419:31:574
1864925991000,100cyclictest0-21swapper/420:06:574
1864925991000,0cyclictest0-21swapper/422:12:344
18649219910099,1cyclictest553-21snmpd21:01:343
18649219910099,1cyclictest553-21snmpd19:25:463
18649219910098,2cyclictest553-21snmpd22:24:313
18649219910098,2cyclictest553-21snmpd21:57:363
18649219910098,2cyclictest553-21snmpd21:16:293
18649169910099,1cyclictest553-21snmpd23:12:322
18649169910099,1cyclictest553-21snmpd23:03:242
18649169910099,1cyclictest553-21snmpd22:30:222
18649169910099,1cyclictest553-21snmpd21:31:082
18649169910099,1cyclictest553-21snmpd00:29:362
18649169910099,1cyclictest2044224-21cat22:55:152
18649169910099,0cyclictest553-21snmpd22:14:042
1864916991000,99cyclictest0-21swapper/223:17:182
1864916991000,99cyclictest0-21swapper/219:44:172
1864916991000,99cyclictest0-21swapper/200:18:352
1864916991000,99cyclictest0-21swapper/200:11:142
1864916991000,100cyclictest0-21swapper/221:39:052
18649129910099,1cyclictest553-21snmpd23:36:031
18649129910099,1cyclictest553-21snmpd22:45:321
18649129910099,1cyclictest553-21snmpd21:35:411
18649129910099,1cyclictest553-21snmpd20:42:361
18649129910099,1cyclictest553-21snmpd20:14:231
18649129910099,1cyclictest553-21snmpd19:56:351
18649129910099,1cyclictest553-21snmpd00:03:281
18649129910099,1cyclictest1994439-21cat22:10:151
18649129910098,2cyclictest553-21snmpd23:12:271
1864912991000,99cyclictest0-21swapper/123:17:271
1864912991000,99cyclictest0-21swapper/121:26:531
1864912991000,100cyclictest0-21swapper/120:36:331
1864912991000,100cyclictest0-21swapper/119:40:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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