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2026-04-18 - 10:02

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 Sat Apr 18, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33401552122107,10sleep30-21swapper/319:06:073
33402532116101,10sleep70-21swapper/719:07:317
33401672116101,10sleep60-21swapper/619:06:176
33401622116101,10sleep10-21swapper/119:06:121
3338314211399,9sleep20-21swapper/219:05:102
3340199211298,9sleep00-21swapper/019:06:430
3340128211298,9sleep40-21swapper/419:05:444
3340343211096,9sleep50-21swapper/519:08:495
33406559910599,3cyclictest553-21snmpd00:11:470
3340674991020,99cyclictest3402595-21diskmemload00:23:505
3340674991020,102cyclictest0-21swapper/500:25:155
334066699102100,1cyclictest553-21snmpd20:00:273
3340655991020,1cyclictest0-21swapper/021:05:140
3340655991020,100cyclictest0-21swapper/021:45:390
33406789910199,2cyclictest553-21snmpd23:48:196
33406789910199,2cyclictest553-21snmpd23:40:016
33406789910199,1cyclictest3408175-21kworker/6:022:17:586
334067899101100,1cyclictest3507920-21kworker/6:223:25:116
3340678991010,100cyclictest0-21swapper/620:51:176
3340674991010,101cyclictest0-21swapper/521:40:545
3340674991010,101cyclictest0-21swapper/500:35:305
3340670991010,99cyclictest0-21swapper/422:10:464
3340670991010,100cyclictest0-21swapper/423:52:284
33406669910199,2cyclictest553-21snmpd23:32:513
33406649910199,2cyclictest0-21swapper/222:38:442
33406649910198,3cyclictest553-21snmpd22:06:282
33406649910198,2cyclictest3431675-21cat21:35:142
334066499101100,1cyclictest553-21snmpd21:25:172
3340664991010,99cyclictest0-21swapper/220:38:102
3340664991010,101cyclictest0-21swapper/200:27:052
3340664991010,100cyclictest0-21swapper/223:51:282
33406599910199,2cyclictest553-21snmpd22:40:111
33406599910199,2cyclictest553-21snmpd00:04:531
3340659991010,100cyclictest0-21swapper/122:36:281
33406559910198,3cyclictest553-21snmpd23:01:440
33406559910198,3cyclictest553-21snmpd22:39:020
3340655991010,99cyclictest0-21swapper/000:31:090
3340655991010,101cyclictest0-21swapper/022:50:110
3340655991010,101cyclictest0-21swapper/022:01:060
3340655991010,100cyclictest0-21swapper/023:26:030
3340655991010,100cyclictest0-21swapper/019:43:500
3340655991010,0cyclictest0-21swapper/023:05:090
3340683991000,99cyclictest0-21swapper/722:35:567
3340683991000,99cyclictest0-21swapper/720:42:287
3340683991000,99cyclictest0-21swapper/720:17:367
3340683991000,99cyclictest0-21swapper/720:08:557
3340683991000,100cyclictest0-21swapper/723:08:277
3340683991000,100cyclictest0-21swapper/722:07:377
3340683991000,100cyclictest0-21swapper/719:40:337
33406789910099,1cyclictest553-21snmpd22:42:476
33406789910099,1cyclictest553-21snmpd19:18:056
33406789910099,1cyclictest553-21snmpd19:13:236
33406789910099,1cyclictest3625141-21kworker/6:100:36:206
33406789910099,1cyclictest3625141-21kworker/6:100:34:426
33406789910099,1cyclictest3530374-21kworker/6:123:05:246
33406789910099,1cyclictest3507920-21kworker/6:223:35:146
33406789910099,1cyclictest3408175-21kworker/6:022:25:266
33406789910099,1cyclictest3408175-21kworker/6:021:50:226
33406789910099,1cyclictest3408175-21kworker/6:021:40:176
33406789910099,1cyclictest3408175-21kworker/6:021:35:126
33406789910099,1cyclictest3369273-21kworker/6:220:45:146
33406789910099,1cyclictest3369273-21kworker/6:220:05:016
33406789910099,1cyclictest3352471-21cat19:30:146
3340678991000,99cyclictest0-21swapper/623:55:466
3340678991000,100cyclictest0-21swapper/619:56:186
33406749910099,1cyclictest553-21snmpd23:51:235
33406749910099,1cyclictest553-21snmpd22:54:505
33406749910099,1cyclictest3576511-21cat23:45:145
33406749910098,2cyclictest553-21snmpd22:36:495
33406749910098,2cyclictest553-21snmpd00:01:175
33406749910097,3cyclictest553-21snmpd23:04:025
33406749910097,3cyclictest553-21snmpd22:31:475
3340674991000,99cyclictest0-21swapper/519:24:565
3340674991000,100cyclictest0-21swapper/523:59:075
3340674991000,100cyclictest0-21swapper/523:34:125
33406709910099,1cyclictest553-21snmpd22:35:164
33406709910099,1cyclictest553-21snmpd21:37:104
33406709910099,1cyclictest553-21snmpd00:29:594
3340670991000,99cyclictest0-21swapper/423:26:154
3340670991000,99cyclictest0-21swapper/422:54:024
3340670991000,100cyclictest0-21swapper/423:15:404
33406669910099,1cyclictest553-21snmpd23:07:333
33406669910099,1cyclictest553-21snmpd21:56:003
33406669910099,1cyclictest553-21snmpd20:32:283
33406669910099,1cyclictest553-21snmpd00:30:233
33406669910099,1cyclictest553-21snmpd00:07:353
33406669910098,2cyclictest553-21snmpd20:14:033
33406669910098,2cyclictest553-21snmpd00:17:083
33406669910098,1cyclictest605-21lldpd00:13:183
33406649910099,1cyclictest553-21snmpd21:32:002
33406649910098,2cyclictest553-21snmpd23:01:202
33406649910098,1cyclictest553-21snmpd19:48:022
33406649910094,5cyclictest0-21swapper/222:00:122
3340664991000,99cyclictest0-21swapper/222:57:002
3340664991000,99cyclictest0-21swapper/222:56:592
3340664991000,99cyclictest0-21swapper/222:30:342
3340664991000,99cyclictest0-21swapper/220:40:162
3340664991000,99cyclictest0-21swapper/200:15:052
3340664991000,100cyclictest0-21swapper/219:13:252
3340664991000,100cyclictest0-21swapper/200:13:452
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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