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2026-07-02 - 09:42

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 Thu Jul 02, 2026 00:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18351992522,2cyclictest29467-21sh23:19:343
1835199250,24cyclictest7431-21ssh22:01:183
1835199250,24cyclictest15131-21apt-get21:41:073
1834999250,24cyclictest0-21swapper/223:14:032
18345992525,0cyclictest0-21swapper/120:26:071
1834599250,1cyclictest9498-21sh21:36:091
18344992523,1cyclictest21649-21sh00:37:530
18344992523,1cyclictest21649-21sh00:37:530
1834499250,24cyclictest11984-21diskmemload21:14:150
1834499250,24cyclictest11984-21diskmemload00:23:230
18351992421,2cyclictest313-21systemd-journal19:35:003
18351992421,2cyclictest25440-21ssh21:21:093
1835199240,24cyclictest0-21swapper/323:08:153
1835199240,23cyclictest28997-21sh21:52:183
1835199240,23cyclictest16077-21hddtemp_smartct23:36:113
18349992424,0cyclictest25380-1kworker/u9:022:49:402
18349992422,1cyclictest4248-21sh23:54:592
18349992421,0cyclictest0-21swapper/221:15:252
18349992418,5cyclictest7299-21rm00:25:522
1834999240,24cyclictest0-21swapper/200:05:512
1834999240,23cyclictest606-21dbus-daemon22:00:002
1834999240,23cyclictest0-21swapper/221:36:352
1834999240,1cyclictest7486-21awk19:55:002
18345992424,0cyclictest0-21swapper/121:27:011
18345992423,0cyclictest11984-21diskmemload22:25:181
18345992422,1cyclictest0-21swapper/122:50:211
18345992422,1cyclictest0-21swapper/100:06:151
1834599240,23cyclictest0-21swapper/121:10:381
1834599240,23cyclictest0-21swapper/100:13:191
1834599240,1cyclictest13607-21memory22:36:111
1834499240,24cyclictest0-21swapper/021:46:210
1834499240,23cyclictest11984-21diskmemload23:57:350
1834499240,23cyclictest11984-21diskmemload23:43:280
1834499240,23cyclictest11186-21sh22:34:290
1834499240,23cyclictest0-21swapper/023:49:590
1834499240,23cyclictest0-21swapper/021:51:080
1834499240,23cyclictest0-21swapper/000:32:250
1834499240,23cyclictest0-21swapper/000:26:370
1834499240,1cyclictest62550irq/127-eno123:53:020
1834499240,0cyclictest0-21swapper/022:06:440
18351992323,0cyclictest0-21swapper/323:26:023
18351992323,0cyclictest0-21swapper/322:45:423
18351992323,0cyclictest0-21swapper/322:20:463
18351992323,0cyclictest0-21swapper/321:58:143
18351992323,0cyclictest0-21swapper/321:35:433
18351992322,1cyclictest0-21swapper/322:43:303
18351992321,1cyclictest11999-21apt-get21:10:013
18351992321,1cyclictest0-21swapper/322:25:213
18351992321,1cyclictest0-21swapper/321:27:423
18351992321,1cyclictest0-21swapper/300:31:373
18351992320,2cyclictest10308-21ssh23:01:223
1835199230,2cyclictest6612-21sh22:58:593
1835199230,23cyclictest0-21swapper/322:50:033
1835199230,23cyclictest0-21swapper/300:26:193
1835199230,23cyclictest0-21swapper/300:19:373
1835199230,22cyclictest0-21swapper/323:10:013
1835199230,22cyclictest0-21swapper/322:11:003
1835199230,22cyclictest0-21swapper/321:31:083
1835199230,0cyclictest11984-21diskmemload22:35:303
1835199230,0cyclictest0-21swapper/323:45:063
1835199230,0cyclictest0-21swapper/322:34:183
1835199230,0cyclictest0-21swapper/322:07:363
18349992323,0cyclictest2767-21ssh23:24:422
18349992323,0cyclictest11984-21diskmemload23:56:062
18349992323,0cyclictest11984-21diskmemload23:16:202
18349992323,0cyclictest11984-21diskmemload22:40:042
18349992323,0cyclictest11984-21diskmemload22:27:262
18349992323,0cyclictest0-21swapper/222:24:052
18349992323,0cyclictest0-21swapper/222:11:042
18349992323,0cyclictest0-21swapper/200:35:142
18349992323,0cyclictest0-21swapper/200:35:142
18349992323,0cyclictest0-21swapper/200:31:372
18349992320,0cyclictest0-21swapper/221:25:142
18349992320,0cyclictest0-21swapper/221:10:332
18349992319,0cyclictest0-21swapper/223:43:572
18349992318,4cyclictest11984-21diskmemload00:21:542
1834999230,23cyclictest0-21swapper/221:52:382
1834999230,23cyclictest0-21swapper/200:10:472
1834999230,22cyclictest5362-21ssh22:00:532
1834999230,22cyclictest30298-21ls19:35:002
1834999230,22cyclictest19155-21ssh23:39:002
1834999230,0cyclictest16743-21ssh22:39:242
1834999230,0cyclictest11984-21diskmemload23:49:042
1834999230,0cyclictest0-21swapper/223:01:472
1834999230,0cyclictest0-21swapper/222:51:042
1834999230,0cyclictest0-21swapper/221:20:162
18345992323,0cyclictest11984-21diskmemload23:53:161
18345992323,0cyclictest0-21swapper/122:42:501
18345992323,0cyclictest0-21swapper/122:17:001
18345992323,0cyclictest0-21swapper/122:17:001
18345992323,0cyclictest0-21swapper/121:58:101
18345992323,0cyclictest0-21swapper/121:44:541
18345992323,0cyclictest0-21swapper/100:16:121
18345992322,1cyclictest27749-21ssh22:20:331
18345992322,0cyclictest0-21swapper/123:48:401
18345992321,1cyclictest2888-21ssh23:24:521
18345992321,1cyclictest0-21swapper/100:35:431
18345992321,1cyclictest0-21swapper/100:35:431
18345992320,2cyclictest5069-21ssh23:55:511
1834599230,2cyclictest9302-21ssh22:31:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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