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2026-05-23 - 00:17

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 May 22, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40115942126115,7sleep00-21swapper/007:07:380
40117222121107,9sleep40-21swapper/407:09:284
40117382116103,8sleep20-21swapper/207:09:422
40116042115101,9sleep10-21swapper/107:07:471
4011508211588,9sleep60-21swapper/607:06:256
401202699114113,1cyclictest0-21swapper/712:29:297
4011716211498,10sleep70-21swapper/707:09:237
401202399113113,0cyclictest553-21snmpd12:19:076
401200799112111,1cyclictest0-21swapper/212:19:072
4009640211197,9sleep50-21swapper/507:05:045
4011523210993,10sleep30-21swapper/307:06:383
40120199910598,4cyclictest553-21snmpd09:17:415
401202399102100,2cyclictest4174957-21cat10:40:146
40120199910299,3cyclictest553-21snmpd10:42:165
40120199910299,3cyclictest4064755-21cat08:50:145
40120039910299,2cyclictest553-21snmpd11:39:381
4012026991010,101cyclictest0-21swapper/708:00:127
4012026991010,100cyclictest0-21swapper/708:33:057
40120239910199,2cyclictest553-21snmpd10:37:266
4012023991010,100cyclictest0-21swapper/607:43:336
40120199910199,2cyclictest553-21snmpd10:10:225
40120199910198,3cyclictest553-21snmpd11:17:435
4012019991010,0cyclictest0-21swapper/509:36:405
4012019991010,0cyclictest0-21swapper/508:16:005
401201699101100,1cyclictest553-21snmpd08:01:214
40120129910199,2cyclictest553-21snmpd11:44:503
40120079910199,2cyclictest553-21snmpd11:13:192
4012003991010,100cyclictest0-21swapper/109:14:361
40119989910199,2cyclictest553-21snmpd10:15:320
40119989910199,2cyclictest553-21snmpd09:40:580
40119989910199,2cyclictest553-21snmpd09:11:270
4011998991010,100cyclictest0-21swapper/012:35:160
4011998991010,100cyclictest0-21swapper/012:21:150
4011998991010,100cyclictest0-21swapper/011:48:570
4012026991000,99cyclictest0-21swapper/707:39:367
4012026991000,100cyclictest0-21swapper/708:40:387
4012026991000,100cyclictest0-21swapper/708:39:477
4012026991000,0cyclictest0-21swapper/712:07:017
40120239910099,1cyclictest553-21snmpd11:55:306
40120239910099,1cyclictest553-21snmpd08:25:466
40120239910098,2cyclictest553-21snmpd11:54:366
40120239910098,2cyclictest553-21snmpd11:09:506
40120239910098,2cyclictest553-21snmpd10:01:296
4012023991000,99cyclictest0-21swapper/611:18:496
4012023991000,100cyclictest0-21swapper/610:48:496
40120199910099,1cyclictest553-21snmpd08:43:555
40120199910099,1cyclictest553-21snmpd07:14:295
40120199910098,2cyclictest553-21snmpd12:28:535
40120199910098,2cyclictest553-21snmpd11:09:235
40120199910098,2cyclictest553-21snmpd09:27:105
4012019991000,99cyclictest0-21swapper/511:31:595
4012019991000,99cyclictest0-21swapper/508:59:575
4012019991000,99cyclictest0-21swapper/507:48:385
4012019991000,100cyclictest0-21swapper/510:57:125
4012019991000,100cyclictest0-21swapper/510:57:125
4012019991000,100cyclictest0-21swapper/509:56:205
4012019991000,100cyclictest0-21swapper/509:30:155
4012019991000,100cyclictest0-21swapper/508:10:095
40120169910099,1cyclictest553-21snmpd08:15:274
40120169910098,2cyclictest553-21snmpd09:34:374
40120129910099,1cyclictest553-21snmpd08:37:493
40120129910099,1cyclictest553-21snmpd08:19:193
40120129910098,2cyclictest553-21snmpd10:29:353
40120129910098,2cyclictest553-21snmpd10:01:073
40120079910099,1cyclictest553-21snmpd11:58:292
40120079910099,1cyclictest553-21snmpd10:48:492
40120079910099,1cyclictest553-21snmpd07:43:322
40120079910098,2cyclictest4072334-21cat09:05:142
40120079910098,1cyclictest553-21snmpd10:14:362
40120039910099,1cyclictest553-21snmpd12:13:251
40120039910099,1cyclictest553-21snmpd11:21:321
40120039910099,1cyclictest553-21snmpd09:45:071
40120039910099,1cyclictest553-21snmpd08:48:081
40120039910098,2cyclictest553-21snmpd10:58:281
40120039910098,2cyclictest553-21snmpd10:58:281
40120039910098,2cyclictest553-21snmpd09:19:301
40120039910098,2cyclictest553-21snmpd08:58:471
40120039910098,2cyclictest553-21snmpd08:11:161
40120039910097,2cyclictest553-21snmpd10:17:301
4012003991000,99cyclictest0-21swapper/111:27:051
4012003991000,99cyclictest0-21swapper/110:10:561
4012003991000,100cyclictest0-21swapper/111:52:331
4012003991000,100cyclictest0-21swapper/110:35:151
4012003991000,100cyclictest0-21swapper/110:01:191
40119989910099,1cyclictest553-21snmpd12:03:010
40119989910098,2cyclictest553-21snmpd11:59:020
4011998991000,99cyclictest0-21swapper/010:04:290
4011998991000,99cyclictest0-21swapper/008:13:400
401202699990,99cyclictest0-21swapper/711:43:367
401202699990,99cyclictest0-21swapper/709:50:347
401202699990,99cyclictest0-21swapper/707:53:087
401202699990,0cyclictest0-21swapper/712:22:527
401202699990,0cyclictest0-21swapper/711:15:117
401202699990,0cyclictest0-21swapper/710:23:007
401202699990,0cyclictest0-21swapper/709:47:377
4012023999998,1cyclictest553-21snmpd10:30:566
4012023999998,1cyclictest553-21snmpd09:41:006
4012023999998,1cyclictest553-21snmpd09:35:586
4012023999998,1cyclictest553-21snmpd08:04:256
4012023999998,1cyclictest553-21snmpd07:28:526
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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