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2026-05-29 - 19:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Fri May 29, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21716994610,0cyclictest0-21swapper/212:00:492
21707993332,1cyclictest19714-21lspci12:00:490
2171699260,2cyclictest4297-21rm11:17:042
2171699260,25cyclictest6820-21apt-get09:48:212
2171699260,25cyclictest32068-21diskmemload09:29:032
2171699260,25cyclictest14570-21sh12:26:172
2171699260,25cyclictest0-21swapper/209:14:042
2171699260,22cyclictest32068-21diskmemload09:16:512
2171699260,21cyclictest0-21swapper/210:34:192
21711992624,1cyclictest0-21swapper/112:28:041
21717992523,1cyclictest622-21gdbus08:35:003
2171699250,24cyclictest0-21swapper/212:11:122
2171699250,24cyclictest0-21swapper/210:47:512
2171699250,1cyclictest0-21swapper/212:08:282
2171699250,1cyclictest0-21swapper/211:04:202
2171699250,0cyclictest0-21swapper/210:38:252
21711992522,2cyclictest774-21runrttasks10:40:241
2171199250,24cyclictest32068-21diskmemload09:31:161
2171199250,24cyclictest0-21swapper/111:41:181
21707992524,1cyclictest0-21swapper/012:30:000
2170799250,24cyclictest32068-21diskmemload11:02:320
2170799250,23cyclictest21081-21rm11:33:210
21717992424,0cyclictest0-21swapper/311:55:023
2171799240,24cyclictest0-21swapper/312:29:263
2171799240,24cyclictest0-21swapper/310:16:083
2171799240,23cyclictest4141-21ssh11:47:453
2171799240,23cyclictest0-21swapper/310:41:153
21716992423,1cyclictest32068-21diskmemload12:36:412
21716992423,1cyclictest14665-21ssh10:55:362
21716992422,1cyclictest0-21swapper/210:04:402
21716992421,3cyclictest0-21swapper/210:53:172
21716992420,3cyclictest0-21swapper/211:39:062
2171699240,23cyclictest32068-21diskmemload11:42:492
2171699240,23cyclictest32068-21diskmemload11:09:262
2171699240,23cyclictest32068-21diskmemload09:42:042
2171699240,23cyclictest0-21swapper/211:50:092
2171699240,23cyclictest0-21swapper/211:45:162
2171699240,22cyclictest0-21swapper/209:20:162
2171699240,21cyclictest32068-21diskmemload09:35:282
2171699240,0cyclictest0-21swapper/210:05:092
21711992424,0cyclictest0-21swapper/110:53:351
2171199240,24cyclictest0-21swapper/111:06:141
2171199240,24cyclictest0-21swapper/109:14:181
2171199240,23cyclictest0-21swapper/112:22:491
2171199240,23cyclictest0-21swapper/111:02:181
2171199240,22cyclictest11687-21ssh10:23:051
21707992423,1cyclictest0-21swapper/010:16:550
2170799240,24cyclictest0-21swapper/011:41:480
2170799240,23cyclictest62550irq/127-eno109:25:240
2170799240,23cyclictest10405-21ssh11:23:190
2170799240,22cyclictest2864-21rm12:14:520
2170799240,1cyclictest0-21swapper/011:06:110
21717992323,0cyclictest0-21swapper/310:12:053
21717992322,0cyclictest32068-21diskmemload09:18:293
21717992321,1cyclictest32068-21diskmemload10:50:013
21717992321,1cyclictest28372-21apt-get10:08:223
21717992321,1cyclictest0-21swapper/312:33:383
21717992321,1cyclictest0-21swapper/310:32:183
21717992321,1cyclictest0-21swapper/309:25:483
2171799231,21cyclictest606-21dbus-daemon08:30:013
2171799231,1cyclictest32635-21expr11:13:213
2171799230,23cyclictest0-21swapper/310:02:043
2171799230,22cyclictest32068-21diskmemload10:22:523
2171799230,22cyclictest26682-21ssh11:07:503
2171799230,22cyclictest25786-21ssh10:35:273
2171799230,22cyclictest20378-21ssh12:01:143
2171799230,22cyclictest19596-21sh11:00:073
2171799230,22cyclictest15787-21ssh10:26:193
2171799230,22cyclictest15777-21ssh10:57:193
2171799230,0cyclictest32068-21diskmemload09:39:223
21716992323,0cyclictest0-21swapper/212:20:062
21716992323,0cyclictest0-21swapper/212:16:592
21716992323,0cyclictest0-21swapper/210:25:502
21716992321,1cyclictest5029-21perf08:00:002
21716992321,1cyclictest0-21swapper/210:18:072
21716992320,3cyclictest0-21swapper/211:14:232
21716992320,3cyclictest0-21swapper/210:11:082
21716992320,2cyclictest31356-21perf07:40:012
2171699230,23cyclictest0-21swapper/211:58:122
2171699230,22cyclictest21408-21ssh09:30:222
2171699230,1cyclictest0-21swapper/209:50:592
21711992323,0cyclictest0-21swapper/112:06:221
21711992323,0cyclictest0-21swapper/111:24:591
21711992323,0cyclictest0-21swapper/110:35:051
21711992323,0cyclictest0-21swapper/109:23:351
21711992321,1cyclictest0-21swapper/111:58:361
21711992321,1cyclictest0-21swapper/111:34:101
21711992321,1cyclictest0-21swapper/110:30:021
21711992321,1cyclictest0-21swapper/109:51:591
2171199231,1cyclictest0-21swapper/109:40:101
2171199230,2cyclictest32248-21ssh12:12:581
2171199230,22cyclictest8365-21ssh11:51:101
2171199230,22cyclictest6672-21ssh09:17:091
2171199230,22cyclictest5670-21sh09:46:381
2171199230,22cyclictest0-21swapper/111:28:291
2171199230,22cyclictest0-21swapper/110:57:311
2171199230,22cyclictest0-21swapper/109:28:211
2171199230,0cyclictest32068-21diskmemload11:35:231
2171199230,0cyclictest0-21swapper/112:18:391
2171199230,0cyclictest0-21swapper/111:15:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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