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2026-04-26 - 09:54

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 Sun Apr 26, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1343654212294,23sleep20-21swapper/219:06:542
1343649212293,10sleep60-21swapper/619:06:496
13438622119105,9sleep40-21swapper/419:09:524
1343599211989,10sleep30-21swapper/319:06:073
1343791211499,10sleep70-21swapper/719:08:517
1343653211499,10sleep10-21swapper/119:06:531
1343798211298,9sleep50-21swapper/519:08:565
1343719211298,9sleep00-21swapper/019:07:480
1344127991030,100cyclictest0-21swapper/523:04:105
1344133991020,100cyclictest0-21swapper/721:29:467
1344127991020,101cyclictest0-21swapper/523:23:585
13441229910299,3cyclictest553-21snmpd21:32:434
1344122991020,102cyclictest0-21swapper/422:00:154
13441189910299,3cyclictest553-21snmpd23:19:013
13441189910299,2cyclictest553-21snmpd22:22:333
13441139910299,3cyclictest553-21snmpd19:42:242
1344113991020,100cyclictest0-21swapper/200:05:212
1344110991020,100cyclictest0-21swapper/123:46:351
1344110991020,100cyclictest0-21swapper/100:35:241
1344133991010,99cyclictest0-21swapper/720:43:577
1344133991010,99cyclictest0-21swapper/720:43:577
1344133991010,1cyclictest0-21swapper/721:41:107
1344133991010,101cyclictest0-21swapper/723:22:297
1344133991010,101cyclictest0-21swapper/700:06:247
1344133991010,100cyclictest0-21swapper/722:19:097
1344129991010,100cyclictest0-21swapper/619:27:336
13441279910199,2cyclictest553-21snmpd21:38:135
13441279910199,1cyclictest553-21snmpd00:19:215
13441279910198,3cyclictest553-21snmpd22:20:215
1344127991010,101cyclictest0-21swapper/522:13:155
1344127991010,101cyclictest0-21swapper/521:53:445
1344127991010,100cyclictest0-21swapper/521:19:585
13441229910199,2cyclictest553-21snmpd22:17:124
13441229910199,2cyclictest553-21snmpd20:27:174
13441229910198,3cyclictest553-21snmpd20:00:014
134412299101100,1cyclictest553-21snmpd22:48:164
1344122991010,99cyclictest0-21swapper/423:30:084
1344122991010,1cyclictest0-21swapper/400:33:224
1344122991010,101cyclictest0-21swapper/423:46:164
1344122991010,0cyclictest0-21swapper/400:22:484
13441139910199,2cyclictest553-21snmpd23:57:182
13441139910199,2cyclictest553-21snmpd23:36:232
13441139910199,2cyclictest553-21snmpd23:10:372
1344113991010,99cyclictest0-21swapper/222:58:342
1344113991010,99cyclictest0-21swapper/221:39:012
13441109910198,3cyclictest553-21snmpd00:30:281
13441109910198,3cyclictest553-21snmpd00:06:501
1344110991010,101cyclictest0-21swapper/119:24:081
13441059910199,1cyclictest553-21snmpd00:03:120
1344105991010,100cyclictest0-21swapper/022:43:270
1344105991010,100cyclictest0-21swapper/000:25:550
1344133991000,99cyclictest0-21swapper/722:37:567
1344133991000,99cyclictest0-21swapper/722:13:507
1344133991000,100cyclictest0-21swapper/721:11:367
1344133991000,0cyclictest0-21swapper/722:28:277
13441299910099,1cyclictest553-21snmpd23:32:566
13441299910099,1cyclictest553-21snmpd21:29:286
13441299910099,1cyclictest553-21snmpd20:30:476
13441299910099,1cyclictest553-21snmpd20:08:016
13441299910099,1cyclictest553-21snmpd19:39:006
13441299910099,1cyclictest553-21snmpd00:02:126
13441299910098,1cyclictest553-21snmpd23:03:346
13441299910098,1cyclictest553-21snmpd22:41:246
1344129991000,99cyclictest0-21swapper/621:42:006
1344129991000,99cyclictest0-21swapper/620:11:596
1344129991000,99cyclictest0-21swapper/619:41:576
1344129991000,100cyclictest0-21swapper/622:11:446
13441279910099,1cyclictest553-21snmpd20:51:065
13441279910097,3cyclictest553-21snmpd19:22:215
1344127991000,99cyclictest0-21swapper/521:29:405
1344127991000,99cyclictest0-21swapper/519:53:495
1344127991000,100cyclictest0-21swapper/523:34:445
1344127991000,100cyclictest0-21swapper/521:40:575
1344127991000,100cyclictest0-21swapper/519:30:175
13441229910099,1cyclictest553-21snmpd22:36:304
13441229910099,1cyclictest553-21snmpd21:35:274
13441229910099,1cyclictest553-21snmpd21:12:444
13441229910098,2cyclictest553-21snmpd21:23:494
13441229910097,3cyclictest553-21snmpd00:09:394
1344122991000,100cyclictest0-21swapper/420:20:144
1344122991000,100cyclictest0-21swapper/419:26:394
13441189910099,1cyclictest553-21snmpd22:16:423
13441189910099,1cyclictest553-21snmpd22:02:323
13441189910099,1cyclictest553-21snmpd20:32:413
13441189910098,1cyclictest553-21snmpd23:02:313
13441189910098,1cyclictest553-21snmpd21:44:293
13441139910099,1cyclictest553-21snmpd21:44:112
13441139910099,1cyclictest1558562-21cat23:25:152
13441139910098,2cyclictest553-21snmpd20:21:382
13441139910097,3cyclictest553-21snmpd23:05:582
1344113991000,99cyclictest0-21swapper/221:54:202
13441109910099,1cyclictest553-21snmpd23:13:421
13441109910099,1cyclictest553-21snmpd22:00:231
13441109910099,1cyclictest553-21snmpd21:32:101
13441109910099,1cyclictest553-21snmpd20:02:311
13441109910099,1cyclictest553-21snmpd19:40:481
13441109910099,1cyclictest553-21snmpd19:19:241
13441109910099,1cyclictest0-21swapper/120:48:451
13441109910098,2cyclictest553-21snmpd23:24:021
13441109910098,2cyclictest553-21snmpd20:22:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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