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2026-04-06 - 18:54

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 here to display the system's profile data or here to proceed to next system.
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 50 highest latencies:
System rackeslot5s.osadl.org (updated Mon Apr 06, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
801699250,24cyclictest5603-21ssh11:51:093
801699250,24cyclictest5352-21apt-get10:48:563
801599250,24cyclictest2157-21diskmemload09:30:132
8011992525,0cyclictest0-21swapper/111:43:391
8011992523,1cyclictest0-21swapper/109:38:331
801199250,1cyclictest19504-21ssh10:29:451
8009992523,1cyclictest15973-21ssh12:01:200
801699240,23cyclictest2157-21diskmemload12:06:583
801699240,23cyclictest0-21swapper/312:33:223
801699240,23cyclictest0-21swapper/310:56:263
801699240,23cyclictest0-21swapper/309:18:233
801699240,23cyclictest0-21swapper/309:14:053
801699240,1cyclictest15448-21sh10:25:583
801599242,21cyclictest2157-21diskmemload12:22:372
8015992420,1cyclictest0-21swapper/210:34:232
8015992419,2cyclictest0-21swapper/209:15:382
801599241,22cyclictest28-21ksoftirqd/211:48:572
801599240,23cyclictest21349-21ssh12:38:582
801599240,23cyclictest0-21swapper/210:05:012
801599240,23cyclictest0-21swapper/209:26:452
801599240,1cyclictest28-21ksoftirqd/211:04:302
801599240,0cyclictest0-21swapper/208:23:552
8011992422,1cyclictest622-21gdbus09:55:001
8011992422,1cyclictest25116-21cron12:10:011
8011992422,1cyclictest0-21swapper/110:44:541
801199240,24cyclictest0-21swapper/110:49:381
801199240,24cyclictest0-21swapper/110:15:351
801199240,23cyclictest29985-21sh10:40:011
801199240,23cyclictest2638-21ssh09:10:301
801199240,23cyclictest2157-21diskmemload09:34:111
801199240,23cyclictest0-21swapper/112:03:451
801199240,23cyclictest0-21swapper/111:12:571
801199240,23cyclictest0-21swapper/109:16:461
8009992423,1cyclictest31975-21ssh10:10:130
8009992421,2cyclictest14860-21sh11:59:570
800999240,24cyclictest0-21swapper/010:57:080
800999240,23cyclictest20763-21perf07:35:000
800999240,23cyclictest18141-21ssh11:31:590
800999240,1cyclictest0-21swapper/011:18:330
8016992323,0cyclictest2157-21diskmemload12:15:553
8016992323,0cyclictest0-21swapper/310:15:073
8016992321,1cyclictest313-21systemd-journal10:44:563
801699230,23cyclictest0-21swapper/312:35:473
801699230,23cyclictest0-21swapper/311:56:263
801699230,22cyclictest30906-21sh11:13:133
801699230,22cyclictest30607-21kworker/u8:009:41:343
801699230,22cyclictest28867-21ssh09:35:453
801699230,22cyclictest28860-21ssh11:42:443
801699230,22cyclictest23801-21ssh11:37:493
801699230,22cyclictest22996-21sh10:02:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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