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2026-03-15 - 12:01

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 Mar 15, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16623982118103,10sleep50-21swapper/519:05:445
16626632116101,10sleep70-21swapper/719:09:307
16625272114100,9sleep10-21swapper/119:07:321
1662404211499,10sleep20-21swapper/219:05:492
1662686211399,9sleep30-21swapper/319:09:503
1662640211399,9sleep40-21swapper/419:09:114
1662627211298,9sleep00-21swapper/019:08:590
1662662210994,10sleep60-21swapper/619:09:306
1663107991030,100cyclictest1669712-21df_inode19:20:126
1663107991020,1cyclictest0-21swapper/622:58:446
1663107991020,101cyclictest1854773-21grep23:05:206
16631039910299,3cyclictest553-21snmpd22:42:375
16630919910299,3cyclictest553-21snmpd23:49:213
166308699102101,1cyclictest0-21swapper/221:40:142
16630819910299,3cyclictest553-21snmpd20:20:061
16630819910299,3cyclictest553-21snmpd20:20:051
16630819910298,2cyclictest553-21snmpd23:14:501
1663081991020,0cyclictest0-21swapper/100:15:161
16631139910198,3cyclictest0-21swapper/722:03:417
1663113991010,99cyclictest0-21swapper/721:44:567
16631079910199,2cyclictest553-21snmpd20:42:516
1663107991010,99cyclictest0-21swapper/600:17:286
1663107991010,101cyclictest0-21swapper/600:22:316
1663107991010,101cyclictest0-21swapper/600:22:316
16631039910199,2cyclictest553-21snmpd20:52:035
16631039910198,3cyclictest553-21snmpd19:58:255
16631039910197,4cyclictest553-21snmpd00:15:345
1663103991010,101cyclictest0-21swapper/521:34:195
1663103991010,100cyclictest0-21swapper/520:23:175
1663103991010,100cyclictest0-21swapper/520:23:175
1663103991010,100cyclictest0-21swapper/519:18:395
1663103991010,0cyclictest0-21swapper/521:39:355
16630979910199,2cyclictest553-21snmpd23:22:594
16630919910199,2cyclictest553-21snmpd23:56:033
16630919910199,2cyclictest553-21snmpd23:41:513
16630919910199,2cyclictest553-21snmpd22:50:013
16630919910199,2cyclictest553-21snmpd21:53:023
16630919910199,2cyclictest553-21snmpd20:36:023
16630919910198,3cyclictest553-21snmpd19:50:163
16630919910197,3cyclictest553-21snmpd22:46:073
1663086991010,100cyclictest0-21swapper/221:34:162
16630819910199,2cyclictest553-21snmpd20:54:331
16630819910199,2cyclictest553-21snmpd19:14:291
16630819910198,2cyclictest553-21snmpd22:31:061
16630819910198,2cyclictest553-21snmpd21:11:471
1663081991010,99cyclictest0-21swapper/121:55:021
1663081991010,98cyclictest1724878-21diskmemload22:37:461
1663081991010,101cyclictest0-21swapper/122:15:451
1663081991010,101cyclictest0-21swapper/120:14:251
16630779910199,2cyclictest553-21snmpd23:10:450
166307799101100,1cyclictest553-21snmpd23:08:350
1663077991010,100cyclictest0-21swapper/022:37:070
1663077991010,100cyclictest0-21swapper/000:29:350
16631139910099,0cyclictest0-21swapper/723:24:057
1663113991000,99cyclictest0-21swapper/723:51:187
1663113991000,99cyclictest0-21swapper/700:02:407
1663113991000,1cyclictest0-21swapper/700:20:407
1663113991000,1cyclictest0-21swapper/700:20:407
1663113991000,100cyclictest0-21swapper/721:29:257
16631079910099,1cyclictest553-21snmpd23:17:416
16631079910099,1cyclictest553-21snmpd20:04:526
16631079910098,1cyclictest553-21snmpd23:26:446
1663107991000,100cyclictest0-21swapper/623:22:326
1663107991000,100cyclictest0-21swapper/621:16:466
1663107991000,100cyclictest0-21swapper/621:14:586
16631039910099,1cyclictest553-21snmpd23:16:085
16631039910099,1cyclictest553-21snmpd19:38:305
16631039910099,1cyclictest1713477-21cat20:45:135
16631039910098,2cyclictest553-21snmpd22:32:015
16631039910098,2cyclictest553-21snmpd21:20:165
16631039910098,2cyclictest553-21snmpd00:05:225
16631039910097,3cyclictest553-21snmpd00:12:135
16631039910097,2cyclictest553-21snmpd21:27:585
1663103991000,99cyclictest0-21swapper/522:45:045
1663103991000,1cyclictest0-21swapper/521:41:235
1663103991000,100cyclictest0-21swapper/519:22:515
1663103991000,100cyclictest0-21swapper/519:13:055
16630979910099,1cyclictest553-21snmpd22:50:314
16630979910099,1cyclictest553-21snmpd21:46:504
16630979910099,1cyclictest553-21snmpd21:38:444
16630979910099,1cyclictest553-21snmpd21:08:374
16630979910099,0cyclictest553-21snmpd23:19:504
16630979910098,2cyclictest553-21snmpd21:55:274
1663097991000,99cyclictest0-21swapper/400:08:494
1663097991000,100cyclictest0-21swapper/423:36:004
1663097991000,100cyclictest0-21swapper/422:56:314
1663097991000,100cyclictest0-21swapper/420:13:344
16630919910099,1cyclictest553-21snmpd23:03:203
16630919910099,1cyclictest553-21snmpd19:42:213
16630919910099,1cyclictest553-21snmpd19:12:503
16630919910098,2cyclictest553-21snmpd21:56:353
16630919910098,2cyclictest553-21snmpd00:34:473
16630919910097,3cyclictest553-21snmpd22:19:453
16630919910097,3cyclictest553-21snmpd20:27:353
16630869910099,1cyclictest553-21snmpd22:40:162
16630869910099,1cyclictest553-21snmpd22:08:362
16630869910099,1cyclictest553-21snmpd20:30:592
16630869910099,1cyclictest553-21snmpd19:45:312
1663086991000,99cyclictest0-21swapper/219:38:422
1663086991000,100cyclictest1724878-21diskmemload00:04:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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