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2026-07-26 - 18:45

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 Sun Jul 26, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25286992624,1cyclictest21950irq/142-nvme0q312:30:012
2527799263,22cyclictest783-21snmpd11:10:340
2529099251,3cyclictest22397-21apt11:10:003
2529099251,0cyclictest0-21swapper/309:18:593
2529099250,24cyclictest18650-21diskmemload12:19:433
25286992523,1cyclictest0-21swapper/212:03:332
25286992523,1cyclictest0-21swapper/211:52:582
25286992523,1cyclictest0-21swapper/211:20:342
25286992523,1cyclictest0-21swapper/209:13:522
25286992522,2cyclictest622-21gdbus07:20:002
2528699250,24cyclictest0-21swapper/212:11:012
2528699250,24cyclictest0-21swapper/211:28:062
2528699250,24cyclictest0-21swapper/210:08:092
2528199250,24cyclictest17294-21rm11:05:211
2528199250,24cyclictest0-21swapper/111:33:511
2528199250,24cyclictest0-21swapper/111:33:511
2528199250,0cyclictest0-21swapper/110:19:001
25277992523,1cyclictest606-21dbus-daemon08:35:010
25290992423,1cyclictest18207-21ssh11:34:183
25290992423,1cyclictest18207-21ssh11:34:183
25290992423,1cyclictest0-21swapper/309:56:183
25290992422,1cyclictest21045-21idleruntime-cro10:40:003
25290992422,1cyclictest0-21swapper/311:28:093
2529099240,1cyclictest0-21swapper/310:05:263
2529099240,1cyclictest0-21swapper/309:34:563
2528699241,22cyclictest313-21systemd-journal11:10:022
2528699240,23cyclictest18650-21diskmemload10:13:542
2528699240,23cyclictest0-21swapper/209:49:332
2528699240,0cyclictest0-21swapper/210:46:052
2528699240,0cyclictest0-21swapper/210:46:052
25281992421,2cyclictest18650-21diskmemload12:22:221
2528199240,24cyclictest0-21swapper/112:15:031
2528199240,23cyclictest0-21swapper/111:26:041
2528199240,23cyclictest0-21swapper/111:01:581
2528199240,0cyclictest18650-21diskmemload11:59:201
25277992423,0cyclictest29533-21apt-get08:28:090
2527799240,24cyclictest18650-21diskmemload09:33:430
2527799240,24cyclictest0-21swapper/010:08:500
2527799240,23cyclictest18650-21diskmemload12:37:580
2527799240,23cyclictest18650-21diskmemload11:05:480
2527799240,23cyclictest0-21swapper/012:07:170
2527799240,1cyclictest17568-21rm11:33:190
2527799240,1cyclictest17568-21rm11:33:190
25290992323,0cyclictest18650-21diskmemload10:55:193
25290992323,0cyclictest0-21swapper/312:28:273
25290992323,0cyclictest0-21swapper/310:44:073
25290992323,0cyclictest0-21swapper/310:03:143
25290992323,0cyclictest0-21swapper/309:48:093
25290992322,1cyclictest18650-21diskmemload11:20:093
25290992322,1cyclictest18650-21diskmemload10:30:123
25290992322,0cyclictest18650-21diskmemload09:28:333
25290992321,1cyclictest9821-21turbostat07:45:013
25290992321,1cyclictest24944-21ssh11:12:463
25290992321,1cyclictest0-21swapper/312:22:093
2529099230,23cyclictest0-21swapper/310:27:013
2529099230,22cyclictest976-21sh10:50:593
2529099230,22cyclictest9080-21perf08:50:003
2529099230,22cyclictest31922-21ssh10:49:173
2529099230,22cyclictest31922-21ssh10:49:173
2529099230,22cyclictest30605-21sh09:20:383
2529099230,22cyclictest0-21swapper/312:30:153
2529099230,22cyclictest0-21swapper/309:40:563
2529099230,22cyclictest0-21swapper/308:38:093
2529099230,1cyclictest19563-21munin-run09:40:003
2529099230,0cyclictest0-21swapper/309:12:193
25286992323,0cyclictest18650-21diskmemload10:41:252
25286992323,0cyclictest0-21swapper/211:06:422
25286992323,0cyclictest0-21swapper/210:25:442
25286992323,0cyclictest0-21swapper/210:17:512
25286992321,1cyclictest30381-21ssh11:45:322
25286992321,1cyclictest0-21swapper/212:20:212
25286992321,1cyclictest0-21swapper/211:59:252
25286992321,1cyclictest0-21swapper/210:53:132
25286992321,1cyclictest0-21swapper/210:23:112
25286992321,1cyclictest0-21swapper/209:53:132
25286992320,2cyclictest30931-21ssh09:21:122
25286992318,1cyclictest14162-21ssh10:04:182
2528699230,23cyclictest0-21swapper/212:05:412
2528699230,23cyclictest0-21swapper/209:58:492
2528699230,22cyclictest13527-21ssh09:34:232
25281992323,0cyclictest18650-21diskmemload11:17:331
25281992323,0cyclictest18650-21diskmemload10:43:061
25281992323,0cyclictest0-21swapper/110:39:351
25281992323,0cyclictest0-21swapper/109:35:361
25281992322,1cyclictest3330-21ssh09:54:371
25281992322,1cyclictest18650-21diskmemload09:20:321
25281992321,2cyclictest2805-21ssh11:20:291
25281992321,1cyclictest5406-21rm10:25:591
25281992321,1cyclictest31416-21latency_hist08:30:011
25281992321,1cyclictest0-21swapper/110:31:561
2528199230,2cyclictest4290-21sh09:55:341
2528199230,23cyclictest0-21swapper/112:29:581
2528199230,22cyclictest31932-21diskmemload10:20:301
2528199230,22cyclictest21834-21cut08:10:001
2528199230,22cyclictest20311-21ssh12:05:441
2528199230,22cyclictest12674-21grep09:33:201
2528199230,22cyclictest10059-21ssh10:00:591
2528199230,22cyclictest0-21swapper/110:49:361
2528199230,22cyclictest0-21swapper/110:49:361
2528199230,0cyclictest0-21swapper/112:39:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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