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2026-05-02 - 07:39

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 Sat May 02, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
397957999187187,0cyclictest0-21swapper/619:10:526
39792242120106,9sleep00-21swapper/019:08:270
39793102118103,10sleep30-21swapper/319:09:443
39793092117102,10sleep20-21swapper/219:09:422
3979143211786,9sleep40-21swapper/419:07:204
3979024211499,10sleep60-21swapper/619:05:386
3977217211399,9sleep10-21swapper/119:05:081
3979137211095,9sleep70-21swapper/719:07:157
39795799910299,3cyclictest553-21snmpd21:29:356
3979579991020,102cyclictest0-21swapper/621:12:236
3979579991020,102cyclictest0-21swapper/600:25:046
39795749910299,2cyclictest0-21swapper/522:56:055
39795669910299,3cyclictest553-21snmpd22:56:563
39795629910299,3cyclictest553-21snmpd00:15:162
39795629910299,2cyclictest553-21snmpd22:08:402
3979117210287,10sleep50-21swapper/519:06:575
3979581991010,99cyclictest0-21swapper/721:38:177
3979581991010,100cyclictest0-21swapper/723:55:377
39795799910199,1cyclictest553-21snmpd22:03:396
39795799910198,3cyclictest553-21snmpd21:47:426
39795799910198,3cyclictest553-21snmpd20:33:066
39795799910198,3cyclictest553-21snmpd19:31:356
397957999101100,1cyclictest553-21snmpd23:47:346
3979579991010,99cyclictest0-21swapper/623:28:186
3979579991010,101cyclictest0-21swapper/622:10:106
3979579991010,100cyclictest0-21swapper/622:25:136
39795749910199,2cyclictest0-21swapper/519:12:275
39795749910199,1cyclictest553-21snmpd19:41:255
3979574991010,100cyclictest0-21swapper/523:52:435
3979574991010,100cyclictest0-21swapper/520:32:185
39795709910199,2cyclictest553-21snmpd20:50:554
39795709910199,1cyclictest553-21snmpd22:14:434
3979570991010,100cyclictest0-21swapper/422:07:404
3979570991010,100cyclictest0-21swapper/421:05:594
39795669910199,2cyclictest553-21snmpd21:44:023
39795669910199,2cyclictest553-21snmpd20:35:073
397956699101100,1cyclictest553-21snmpd21:21:223
39795629910199,2cyclictest553-21snmpd23:11:212
39795629910199,2cyclictest553-21snmpd23:11:212
39795629910199,2cyclictest553-21snmpd19:59:232
39795629910199,2cyclictest553-21snmpd00:20:012
397956299101100,1cyclictest553-21snmpd00:14:082
3979562991010,100cyclictest0-21swapper/220:17:572
39795579910199,2cyclictest553-21snmpd23:46:571
39795579910199,2cyclictest553-21snmpd21:37:081
397955799101100,1cyclictest553-21snmpd19:49:271
3979557991010,100cyclictest0-21swapper/120:20:391
39795539910199,2cyclictest553-21snmpd22:43:230
39795539910199,2cyclictest0-21swapper/000:02:340
39795539910198,3cyclictest553-21snmpd19:58:530
39795539910198,3cyclictest553-21snmpd19:25:100
39795539910198,3cyclictest4233-21cat23:30:140
3979581991000,99cyclictest0-21swapper/720:40:277
3979581991000,99cyclictest0-21swapper/700:25:327
3979581991000,100cyclictest0-21swapper/721:10:557
3979581991000,100cyclictest0-21swapper/721:08:107
3979581991000,100cyclictest0-21swapper/720:55:447
3979581991000,100cyclictest0-21swapper/719:38:447
3979581991000,100cyclictest0-21swapper/700:20:357
3979581991000,100cyclictest0-21swapper/700:05:487
39795799910099,1cyclictest553-21snmpd22:39:206
39795799910099,1cyclictest553-21snmpd19:25:026
39795799910097,3cyclictest553-21snmpd19:24:466
3979579991000,99cyclictest0-21swapper/623:07:366
3979579991000,99cyclictest0-21swapper/623:07:356
3979579991000,99cyclictest0-21swapper/620:55:416
3979579991000,99cyclictest0-21swapper/620:25:256
3979579991000,99cyclictest0-21swapper/619:46:116
3979579991000,100cyclictest0-21swapper/622:48:526
3979579991000,100cyclictest0-21swapper/620:02:366
39795749910099,1cyclictest553-21snmpd19:33:535
3979574991000,99cyclictest0-21swapper/522:47:165
3979574991000,99cyclictest0-21swapper/522:18:245
3979574991000,99cyclictest0-21swapper/522:07:195
3979574991000,99cyclictest0-21swapper/520:40:135
3979574991000,100cyclictest0-21swapper/523:17:125
3979574991000,100cyclictest0-21swapper/522:20:425
3979574991000,100cyclictest0-21swapper/500:37:125
39795709910099,1cyclictest553-21snmpd23:58:454
39795709910099,1cyclictest553-21snmpd22:33:294
39795709910099,1cyclictest553-21snmpd22:28:464
39795709910099,1cyclictest553-21snmpd20:16:244
39795709910099,1cyclictest553-21snmpd19:42:104
39795709910099,1cyclictest553-21snmpd00:12:414
39795709910099,1cyclictest4192593-21cat23:25:144
39795709910099,1cyclictest37498-21cat00:00:134
39795709910098,2cyclictest553-21snmpd00:21:014
3979570991000,99cyclictest0-21swapper/422:02:074
3979570991000,100cyclictest0-21swapper/423:14:364
3979570991000,100cyclictest0-21swapper/423:14:354
3979570991000,100cyclictest0-21swapper/423:01:324
3979570991000,100cyclictest0-21swapper/419:56:574
3979570991000,100cyclictest0-21swapper/400:32:434
39795669910099,1cyclictest553-21snmpd23:55:423
39795669910099,1cyclictest553-21snmpd21:46:113
39795669910099,1cyclictest553-21snmpd21:10:533
39795669910099,1cyclictest553-21snmpd20:24:223
39795669910099,1cyclictest553-21snmpd20:18:463
39795669910098,2cyclictest553-21snmpd22:11:393
39795629910099,1cyclictest553-21snmpd23:08:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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