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2026-04-28 - 02:06

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 Mon Apr 27, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41294242122107,10sleep30-21swapper/307:06:293
41294772121106,10sleep20-21swapper/207:07:172
4129389211991,10sleep60-21swapper/607:05:596
41294952117102,10sleep00-21swapper/007:07:310
41295182115101,9sleep50-21swapper/507:07:515
41296382114100,9sleep40-21swapper/407:09:344
4129511210995,9sleep70-21swapper/707:07:467
4129559210793,9sleep10-21swapper/107:08:281
412991799104100,4cyclictest553-21snmpd11:25:534
4129917991030,1cyclictest0-21swapper/411:52:364
412992599102100,2cyclictest553-21snmpd10:18:046
4129925991020,101cyclictest0-21swapper/609:20:356
4129917991020,101cyclictest0-21swapper/409:35:134
412990699102100,2cyclictest553-21snmpd09:44:581
41299019910299,3cyclictest553-21snmpd07:10:210
4129929991010,100cyclictest0-21swapper/712:26:347
4129929991010,100cyclictest0-21swapper/710:51:067
4129929991010,100cyclictest0-21swapper/707:21:217
4129925991010,101cyclictest0-21swapper/612:20:226
4129925991010,101cyclictest0-21swapper/611:30:086
4129925991010,100cyclictest0-21swapper/610:54:306
4129925991010,100cyclictest0-21swapper/610:34:186
41299209910199,1cyclictest553-21snmpd11:57:485
41299179910199,2cyclictest553-21snmpd10:04:504
41299179910199,2cyclictest553-21snmpd09:33:164
41299179910198,3cyclictest553-21snmpd08:12:464
41299179910198,3cyclictest553-21snmpd07:43:494
41299179910198,3cyclictest553-21snmpd07:30:564
412991799101100,1cyclictest553-21snmpd11:39:314
4129917991010,99cyclictest0-21swapper/412:38:144
4129917991010,99cyclictest0-21swapper/412:38:144
4129917991010,99cyclictest0-21swapper/409:03:304
4129917991010,101cyclictest0-21swapper/408:58:394
4129917991010,101cyclictest0-21swapper/408:32:204
4129917991010,100cyclictest0-21swapper/409:48:134
4129917991010,100cyclictest0-21swapper/409:14:214
41299139910199,2cyclictest553-21snmpd10:12:133
41299139910199,1cyclictest553-21snmpd09:01:273
41299109910199,2cyclictest553-21snmpd10:09:222
4129910991010,100cyclictest0-21swapper/212:35:142
4129910991010,100cyclictest0-21swapper/212:35:142
4129910991010,100cyclictest0-21swapper/212:30:342
41299069910199,1cyclictest553-21snmpd09:14:391
4129906991010,100cyclictest0-21swapper/110:52:311
41299019910199,2cyclictest553-21snmpd12:36:320
41299019910199,2cyclictest553-21snmpd12:36:310
41299019910199,2cyclictest553-21snmpd12:13:010
41299019910198,3cyclictest553-21snmpd09:07:050
4129901991010,101cyclictest0-21swapper/011:25:100
4129929991000,99cyclictest0-21swapper/712:08:357
4129929991000,99cyclictest0-21swapper/711:34:297
4129929991000,99cyclictest0-21swapper/711:06:257
4129929991000,99cyclictest0-21swapper/709:38:317
4129929991000,99cyclictest0-21swapper/709:05:457
4129929991000,99cyclictest0-21swapper/707:12:477
4129929991000,100cyclictest0-21swapper/712:20:167
4129929991000,100cyclictest0-21swapper/709:02:367
4129929991000,100cyclictest0-21swapper/708:26:507
41299259910099,1cyclictest553-21snmpd12:04:336
41299259910098,2cyclictest0-21swapper/611:03:166
41299259910097,3cyclictest553-21snmpd12:05:506
4129925991000,99cyclictest0-21swapper/612:36:416
4129925991000,99cyclictest0-21swapper/612:36:416
4129925991000,99cyclictest0-21swapper/610:27:486
4129925991000,99cyclictest0-21swapper/609:26:126
4129925991000,99cyclictest0-21swapper/608:43:176
4129925991000,99cyclictest0-21swapper/608:43:176
4129925991000,99cyclictest0-21swapper/608:11:196
41299209910099,1cyclictest553-21snmpd11:19:015
41299209910099,1cyclictest553-21snmpd08:42:055
41299209910099,1cyclictest553-21snmpd08:42:055
41299209910099,1cyclictest553-21snmpd07:50:105
41299209910099,1cyclictest117312-21cat10:55:165
41299209910099,1cyclictest0-21swapper/509:31:225
41299209910098,2cyclictest0-21swapper/512:13:315
41299209910098,2cyclictest0-21swapper/509:21:595
4129920991000,99cyclictest0-21swapper/510:40:295
4129920991000,99cyclictest0-21swapper/510:26:305
4129920991000,99cyclictest0-21swapper/510:16:315
4129920991000,98cyclictest0-21swapper/508:21:505
4129920991000,100cyclictest0-21swapper/510:37:365
4129920991000,100cyclictest0-21swapper/510:03:235
4129920991000,100cyclictest0-21swapper/509:25:145
41299179910099,1cyclictest553-21snmpd12:08:244
41299179910099,1cyclictest553-21snmpd09:54:504
41299179910099,1cyclictest553-21snmpd09:06:124
41299179910099,1cyclictest553-21snmpd08:25:314
41299179910099,1cyclictest553-21snmpd07:21:454
41299179910099,1cyclictest553-21snmpd07:15:544
4129917991000,100cyclictest0-21swapper/408:52:144
4129917991000,100cyclictest0-21swapper/407:10:574
4129917991000,0cyclictest0-21swapper/412:13:374
41299139910099,1cyclictest553-21snmpd09:40:543
41299139910099,1cyclictest553-21snmpd08:40:203
41299139910099,1cyclictest553-21snmpd08:40:193
41299139910099,1cyclictest553-21snmpd07:57:573
41299139910099,1cyclictest553-21snmpd07:16:393
41299139910099,0cyclictest553-21snmpd08:55:363
41299139910098,2cyclictest553-21snmpd11:36:443
41299139910098,2cyclictest553-21snmpd11:07:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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