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2026-05-03 - 17:57

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 May 03, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25384542121108,8sleep40-21swapper/407:05:264
25385292119105,9sleep50-21swapper/507:06:315
2538614211794,10sleep70-21swapper/707:07:467
25384972117102,10sleep20-21swapper/207:06:042
25386102114100,9sleep30-21swapper/307:07:413
2538754211398,10sleep60-21swapper/607:09:456
2538731211097,8sleep10-21swapper/107:09:231
2538690210995,9sleep00-21swapper/007:08:510
2538997991060,103cyclictest0-21swapper/009:46:570
253899799105100,1cyclictest553-21snmpd09:22:410
253899799103100,3cyclictest553-21snmpd11:30:520
2539025991020,101cyclictest0-21swapper/712:10:107
25390179910299,3cyclictest553-21snmpd12:32:155
2539017991020,100cyclictest0-21swapper/512:00:435
2539017991020,100cyclictest0-21swapper/508:58:305
253900299102100,2cyclictest553-21snmpd09:56:471
2538997991020,99cyclictest0-21swapper/008:50:150
2538997991020,100cyclictest0-21swapper/008:02:170
25390219910199,2cyclictest553-21snmpd12:14:256
25390219910199,2cyclictest553-21snmpd11:40:126
2539021991010,100cyclictest0-21swapper/610:17:306
25390179910198,3cyclictest553-21snmpd11:52:015
25390179910198,3cyclictest553-21snmpd11:00:355
2539017991010,101cyclictest0-21swapper/510:25:585
25390139910199,2cyclictest553-21snmpd12:35:184
253901399101100,1cyclictest553-21snmpd08:05:234
25390119910198,2cyclictest553-21snmpd11:16:173
25390069910199,2cyclictest553-21snmpd10:16:432
253900699101100,1cyclictest553-21snmpd11:50:242
2539006991010,100cyclictest0-21swapper/209:35:152
25390029910199,2cyclictest553-21snmpd08:49:031
25390029910198,2cyclictest553-21snmpd10:29:331
253900299101100,1cyclictest553-21snmpd12:20:071
253900299101100,1cyclictest553-21snmpd12:20:071
25389979910199,2cyclictest553-21snmpd11:49:090
25389979910199,1cyclictest553-21snmpd09:13:170
25389979910198,3cyclictest553-21snmpd09:55:050
2538997991010,100cyclictest0-21swapper/011:00:030
2538997991010,100cyclictest0-21swapper/007:44:070
2538997991010,100cyclictest0-21swapper/007:23:240
2538997991010,100cyclictest0-21swapper/007:19:340
2538997991010,0cyclictest0-21swapper/009:43:060
25390259910099,1cyclictest0-21swapper/712:20:297
25390259910099,1cyclictest0-21swapper/712:20:297
25390259910098,2cyclictest0-21swapper/710:40:557
2539025991000,99cyclictest0-21swapper/712:00:377
2539025991000,99cyclictest0-21swapper/708:51:127
2539025991000,99cyclictest0-21swapper/707:16:387
2539025991000,100cyclictest0-21swapper/711:27:257
2539025991000,100cyclictest0-21swapper/708:21:007
25390219910099,1cyclictest553-21snmpd11:14:486
25390219910099,1cyclictest553-21snmpd10:33:466
25390219910099,1cyclictest553-21snmpd07:20:136
25390219910099,1cyclictest553-21snmpd07:19:516
25390219910098,2cyclictest553-21snmpd09:26:316
2539021991000,99cyclictest0-21swapper/607:54:386
2539021991000,99cyclictest0-21swapper/607:45:346
2539021991000,99cyclictest0-21swapper/607:40:426
2539021991000,100cyclictest0-21swapper/612:27:506
2539021991000,100cyclictest0-21swapper/611:08:446
2539021991000,100cyclictest0-21swapper/609:40:006
2539021991000,100cyclictest0-21swapper/608:55:146
2539021991000,100cyclictest0-21swapper/607:34:106
25390179910099,1cyclictest553-21snmpd08:22:335
25390179910099,1cyclictest2753092-21cat11:25:135
25390179910098,2cyclictest553-21snmpd10:51:445
25390179910098,2cyclictest553-21snmpd10:36:195
25390179910098,2cyclictest553-21snmpd09:19:585
2539017991000,99cyclictest0-21swapper/510:08:275
2539017991000,99cyclictest0-21swapper/508:33:355
2539017991000,99cyclictest0-21swapper/508:00:145
2539017991000,99cyclictest0-21swapper/507:58:045
2539017991000,100cyclictest0-21swapper/512:24:495
2539017991000,100cyclictest0-21swapper/512:24:495
2539017991000,100cyclictest0-21swapper/510:15:465
2539017991000,100cyclictest0-21swapper/507:28:345
25390139910099,1cyclictest553-21snmpd11:19:004
25390139910099,1cyclictest553-21snmpd07:59:404
25390139910099,1cyclictest553-21snmpd07:23:284
25390139910099,1cyclictest553-21snmpd07:19:284
2539013991000,100cyclictest0-21swapper/410:32:164
25390119910099,1cyclictest553-21snmpd11:00:443
25390119910099,1cyclictest553-21snmpd10:41:173
25390119910099,1cyclictest553-21snmpd09:02:223
25390119910099,1cyclictest553-21snmpd08:24:263
25390119910098,2cyclictest553-21snmpd10:50:433
25390119910098,1cyclictest553-21snmpd11:26:213
25390069910099,1cyclictest553-21snmpd11:08:032
25390069910099,1cyclictest553-21snmpd10:48:252
25390069910099,1cyclictest553-21snmpd09:56:412
25390069910099,1cyclictest553-21snmpd08:57:012
25390069910099,1cyclictest553-21snmpd07:46:212
25390069910099,1cyclictest2581427-21cat08:30:142
2539006991000,99cyclictest0-21swapper/211:14:452
2539006991000,99cyclictest0-21swapper/209:05:332
2539006991000,99cyclictest0-21swapper/207:21:372
2539006991000,100cyclictest0-21swapper/211:35:162
2539006991000,100cyclictest0-21swapper/209:49:392
25390029910099,1cyclictest553-21snmpd11:56:091
25390029910099,1cyclictest553-21snmpd11:14:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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