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2026-05-08 - 01:24

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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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 50 highest latencies:
System rackeslot5s.osadl.org (updated Thu May 07, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1678699250,24cyclictest10166-21diskmemload10:09:563
1678699250,24cyclictest0-21swapper/312:01:103
1678699250,24cyclictest0-21swapper/307:21:303
1678599250,24cyclictest0-21swapper/210:45:002
16784992523,1cyclictest0-21swapper/112:30:121
16784992523,1cyclictest0-21swapper/112:21:591
16784992523,1cyclictest0-21swapper/109:36:471
1678499250,2cyclictest7574-21rm10:04:291
1678499250,24cyclictest25600-21ssh11:16:361
16783992523,1cyclictest0-21swapper/012:36:360
16783992522,2cyclictest606-21dbus-daemon11:55:000
1678399250,24cyclictest24832-21sh09:21:550
1678399250,24cyclictest10166-21diskmemload09:50:030
1678399250,24cyclictest10156-21rm12:29:160
16786992424,0cyclictest0-21swapper/311:30:213
16786992423,1cyclictest19525-21ssh10:42:113
16786992421,2cyclictest20584-21cron12:10:013
1678699240,0cyclictest0-21swapper/312:27:313
16785992421,2cyclictest10297-21cron10:35:012
16785992420,2cyclictest0-21swapper/211:37:432
16785992420,1cyclictest10166-21diskmemload09:18:162
1678599240,24cyclictest0-21swapper/212:17:222
1678599240,23cyclictest1288-21ssh11:23:352
1678599240,23cyclictest10166-21diskmemload12:10:042
1678599240,23cyclictest10166-21diskmemload10:51:392
1678599240,23cyclictest0-21swapper/211:08:392
1678599240,1cyclictest0-21swapper/210:58:252
16784992423,1cyclictest0-21swapper/111:23:281
16784992422,1cyclictest0-21swapper/109:10:151
1678499240,24cyclictest0-21swapper/111:31:461
1678499240,24cyclictest0-21swapper/110:37:011
1678499240,23cyclictest16860-21sh10:40:551
1678499240,23cyclictest0-21swapper/109:32:131
1678499240,1cyclictest4935-21ssh10:30:051
1678499240,0cyclictest10166-21diskmemload11:26:091
1678499240,0cyclictest0-21swapper/112:15:421
16783992424,0cyclictest0-21swapper/009:47:360
16783992422,1cyclictest0-21swapper/012:18:090
16783992422,1cyclictest0-21swapper/011:25:550
16783992420,3cyclictest30498-21rm10:51:460
1678399240,2cyclictest15467-21rm10:39:240
1678399240,24cyclictest0-21swapper/009:41:390
1678399240,23cyclictest6498-21apt-get07:56:300
1678399240,23cyclictest62550irq/127-eno111:38:290
1678399240,23cyclictest29890-21sh10:23:350
1678399240,23cyclictest12449-21ssh11:05:130
1678399240,23cyclictest0-21swapper/009:30:020
1678399240,22cyclictest0-21swapper/010:29:450
1678399240,1cyclictest0-21swapper/012:11:400
16786992323,0cyclictest0-21swapper/310:24:343
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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