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2026-07-18 - 01:13

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 Jul 17, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36467782119105,9sleep60-21swapper/607:09:056
3646779211499,10sleep70-21swapper/707:09:067
3646672211499,10sleep30-21swapper/307:07:343
3644732211499,10sleep40-21swapper/407:05:104
3646840211095,10sleep20-21swapper/207:09:572
3646614210894,9sleep10-21swapper/107:06:431
3646604210879,9sleep00-21swapper/007:06:340
3644724210893,10sleep50-21swapper/507:05:035
36470889910298,3cyclictest553-21snmpd09:57:333
36470859910299,3cyclictest553-21snmpd11:42:182
3647085991020,102cyclictest0-21swapper/209:25:132
3647085991020,101cyclictest0-21swapper/212:25:502
3647104991010,100cyclictest0-21swapper/711:05:297
3647104991010,100cyclictest0-21swapper/709:31:027
3647104991010,100cyclictest0-21swapper/708:59:097
36471009910199,2cyclictest553-21snmpd12:26:296
36471009910199,2cyclictest553-21snmpd12:11:196
36471009910199,2cyclictest553-21snmpd07:50:316
36471009910199,1cyclictest553-21snmpd11:22:516
364710099101100,1cyclictest553-21snmpd09:42:386
3647100991010,100cyclictest0-21swapper/612:34:196
36470929910199,2cyclictest553-21snmpd11:53:374
364709299101100,1cyclictest553-21snmpd11:41:154
36470889910199,2cyclictest553-21snmpd11:54:223
36470889910199,2cyclictest553-21snmpd11:14:173
36470889910198,2cyclictest553-21snmpd12:39:233
36470889910197,4cyclictest553-21snmpd09:30:263
3647085991010,56cyclictest0-21swapper/210:26:082
3647085991010,100cyclictest0-21swapper/208:09:552
3647085991010,0cyclictest0-21swapper/208:46:362
3647081991010,100cyclictest0-21swapper/111:16:291
36470769910198,3cyclictest553-21snmpd10:03:090
364707699101100,1cyclictest553-21snmpd10:28:370
3647076991010,101cyclictest0-21swapper/007:47:460
3647076991010,100cyclictest0-21swapper/008:48:420
3647076991010,0cyclictest0-21swapper/010:19:330
3647104991000,99cyclictest0-21swapper/712:38:507
3647104991000,99cyclictest0-21swapper/710:59:417
3647104991000,99cyclictest0-21swapper/709:37:207
3647104991000,99cyclictest0-21swapper/707:12:387
3647104991000,1cyclictest0-21swapper/711:48:587
3647104991000,100cyclictest0-21swapper/710:07:397
3647104991000,100cyclictest0-21swapper/709:44:057
3647104991000,0cyclictest0-21swapper/712:15:257
36471009910099,1cyclictest553-21snmpd08:31:326
36471009910099,1cyclictest553-21snmpd08:13:386
36471009910099,1cyclictest553-21snmpd07:25:486
36471009910099,1cyclictest553-21snmpd07:15:446
36471009910099,1cyclictest3811490-21cat10:40:146
36471009910099,1cyclictest3811490-21cat10:40:146
36471009910099,1cyclictest0-21swapper/610:15:066
3647100991000,99cyclictest0-21swapper/610:14:306
3647100991000,100cyclictest0-21swapper/611:41:216
36470959910099,1cyclictest553-21snmpd11:38:415
36470959910099,1cyclictest553-21snmpd11:16:205
36470959910099,1cyclictest553-21snmpd10:01:395
36470959910099,1cyclictest553-21snmpd08:06:345
36470959910098,2cyclictest553-21snmpd12:30:475
36470959910098,2cyclictest553-21snmpd11:48:435
36470959910098,1cyclictest553-21snmpd11:42:245
3647095991000,99cyclictest3709347-21diskmemload09:26:045
3647095991000,99cyclictest0-21swapper/510:58:235
3647095991000,99cyclictest0-21swapper/507:33:455
3647095991000,100cyclictest0-21swapper/509:43:205
3647095991000,100cyclictest0-21swapper/508:29:325
3647095991000,100cyclictest0-21swapper/508:21:265
36470929910099,1cyclictest553-21snmpd12:25:204
36470929910099,1cyclictest553-21snmpd12:09:044
36470929910099,1cyclictest553-21snmpd11:16:474
36470929910099,1cyclictest553-21snmpd11:01:264
36470929910099,1cyclictest553-21snmpd07:47:224
36470929910099,1cyclictest553-21snmpd07:41:394
36470929910099,1cyclictest3893963-21cat11:55:164
3647092991000,99cyclictest0-21swapper/412:39:414
3647092991000,99cyclictest0-21swapper/410:15:164
3647092991000,100cyclictest0-21swapper/411:45:124
3647092991000,100cyclictest0-21swapper/410:30:014
3647092991000,100cyclictest0-21swapper/410:24:454
36470889910099,1cyclictest553-21snmpd12:15:253
36470889910099,1cyclictest553-21snmpd11:35:153
36470889910099,1cyclictest553-21snmpd10:48:403
36470889910099,1cyclictest553-21snmpd10:34:403
36470889910099,1cyclictest553-21snmpd10:00:063
36470889910099,1cyclictest553-21snmpd08:07:313
36470889910098,2cyclictest553-21snmpd10:06:123
36470889910097,3cyclictest553-21snmpd09:51:143
3647085991000,99cyclictest0-21swapper/211:39:542
3647085991000,55cyclictest0-21swapper/210:59:052
3647085991000,55cyclictest0-21swapper/210:37:072
3647085991000,55cyclictest0-21swapper/209:09:152
3647085991000,55cyclictest0-21swapper/208:36:182
3647085991000,55cyclictest0-21swapper/208:14:202
3647085991000,55cyclictest0-21swapper/208:03:212
3647085991000,55cyclictest0-21swapper/207:19:252
3647085991000,100cyclictest0-21swapper/211:55:342
36470819910099,1cyclictest0-21swapper/111:55:131
36470819910098,1cyclictest553-21snmpd11:27:541
3647081991000,99cyclictest0-21swapper/112:10:041
3647081991000,99cyclictest0-21swapper/110:41:191
3647081991000,99cyclictest0-21swapper/110:41:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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