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2026-03-12 - 21:02

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 Thu Mar 12, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1066316212699,22sleep10-21swapper/107:07:151
10662652121106,9sleep40-21swapper/407:06:304
10664992119104,10sleep70-21swapper/707:09:547
10664422117102,10sleep60-21swapper/607:09:046
10662162116101,10sleep20-21swapper/207:05:482
1066358211398,10sleep50-21swapper/507:07:515
1064396211399,9sleep30-21swapper/307:05:093
1066326211297,10sleep00-21swapper/007:07:220
10667389910399,3cyclictest553-21snmpd10:48:110
1066738991030,102cyclictest0-21swapper/010:21:040
1066766991020,100cyclictest0-21swapper/707:43:497
1066742991020,102cyclictest0-21swapper/110:56:241
1066742991020,102cyclictest0-21swapper/108:50:141
1066742991020,101cyclictest0-21swapper/107:42:431
1066738991020,101cyclictest0-21swapper/007:15:130
1066738991020,100cyclictest0-21swapper/008:38:210
1066766991010,100cyclictest0-21swapper/707:23:577
10667649910199,1cyclictest553-21snmpd07:37:486
1066764991010,100cyclictest0-21swapper/609:57:066
1066764991010,100cyclictest0-21swapper/608:26:536
106675999101100,1cyclictest553-21snmpd11:37:345
1066755991010,100cyclictest0-21swapper/407:16:424
10667509910199,2cyclictest553-21snmpd12:13:353
10667509910199,2cyclictest553-21snmpd12:08:013
10667509910199,2cyclictest553-21snmpd11:14:573
10667509910199,2cyclictest553-21snmpd08:49:003
106674799101100,1cyclictest553-21snmpd08:16:442
10667429910199,2cyclictest553-21snmpd11:49:311
10667429910199,1cyclictest553-21snmpd11:12:261
10667429910198,3cyclictest553-21snmpd12:11:211
10667429910198,3cyclictest553-21snmpd11:30:271
10667429910198,3cyclictest1269200-21cat11:15:131
106674299101100,1cyclictest553-21snmpd12:06:551
1066742991010,100cyclictest0-21swapper/112:24:471
1066742991010,100cyclictest0-21swapper/111:52:201
10667389910199,2cyclictest553-21snmpd11:30:480
10667389910199,2cyclictest553-21snmpd09:17:070
1066738991010,99cyclictest0-21swapper/008:44:240
1066738991010,101cyclictest0-21swapper/007:47:370
1066766991000,99cyclictest0-21swapper/710:55:117
1066766991000,99cyclictest0-21swapper/710:35:347
1066766991000,99cyclictest0-21swapper/707:27:497
1066766991000,99cyclictest0-21swapper/707:12:357
1066766991000,100cyclictest0-21swapper/712:38:307
1066766991000,100cyclictest0-21swapper/712:14:447
1066766991000,100cyclictest0-21swapper/711:57:197
1066766991000,100cyclictest0-21swapper/709:33:267
1066766991000,100cyclictest0-21swapper/709:13:447
10667649910099,1cyclictest553-21snmpd12:40:006
10667649910099,1cyclictest553-21snmpd08:45:526
10667649910099,1cyclictest553-21snmpd08:41:576
10667649910099,1cyclictest553-21snmpd07:20:136
10667649910098,2cyclictest553-21snmpd11:58:406
10667649910098,2cyclictest553-21snmpd11:50:106
1066764991000,99cyclictest0-21swapper/612:20:546
1066764991000,100cyclictest0-21swapper/611:47:136
1066764991000,100cyclictest0-21swapper/610:04:066
1066764991000,100cyclictest0-21swapper/609:35:326
1066764991000,100cyclictest0-21swapper/607:59:046
10667599910099,1cyclictest553-21snmpd12:25:205
10667599910099,1cyclictest553-21snmpd11:59:015
10667599910099,1cyclictest553-21snmpd11:43:315
10667599910099,1cyclictest553-21snmpd10:23:285
10667599910099,1cyclictest0-21swapper/511:05:115
1066759991000,99cyclictest0-21swapper/512:35:265
1066759991000,99cyclictest0-21swapper/509:17:585
1066759991000,99cyclictest0-21swapper/508:48:095
10667559910099,1cyclictest553-21snmpd12:13:324
10667559910099,1cyclictest553-21snmpd11:27:034
10667559910099,1cyclictest553-21snmpd07:32:514
10667559910099,1cyclictest553-21snmpd07:14:564
10667559910099,1cyclictest1083604-21cat07:40:134
1066755991000,99cyclictest0-21swapper/411:12:574
1066755991000,99cyclictest0-21swapper/411:10:004
1066755991000,100cyclictest1284931-21ssh11:30:074
1066755991000,100cyclictest0-21swapper/412:25:144
1066755991000,100cyclictest0-21swapper/410:03:004
10667509910099,1cyclictest553-21snmpd10:55:173
10667509910099,1cyclictest553-21snmpd10:18:363
10667509910099,1cyclictest553-21snmpd09:51:233
10667509910099,1cyclictest553-21snmpd09:19:133
10667509910099,1cyclictest553-21snmpd08:57:063
10667509910099,1cyclictest553-21snmpd08:57:063
10667509910099,1cyclictest553-21snmpd07:46:373
10667509910098,2cyclictest553-21snmpd08:22:593
10667479910099,1cyclictest553-21snmpd09:09:462
10667479910098,2cyclictest553-21snmpd11:47:132
10667479910098,2cyclictest553-21snmpd10:04:072
10667479910098,2cyclictest553-21snmpd09:57:062
10667429910099,1cyclictest553-21snmpd12:31:351
10667429910099,1cyclictest553-21snmpd12:16:381
10667429910098,2cyclictest553-21snmpd09:32:141
10667429910098,2cyclictest553-21snmpd07:57:461
1066742991000,99cyclictest0-21swapper/108:25:141
1066742991000,100cyclictest0-21swapper/111:24:001
1066742991000,100cyclictest0-21swapper/109:45:231
1066742991000,100cyclictest0-21swapper/109:16:431
10667389910099,1cyclictest553-21snmpd12:19:530
10667389910099,1cyclictest553-21snmpd12:03:310
10667389910099,1cyclictest553-21snmpd10:57:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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