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2026-02-10 - 03:16
[ 290.152] (II) VESA: driver for VESA chipsets: vesa

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #3

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 50 highest latencies:
System rack3slot3s.osadl.org (updated Tue Feb 10, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1163539212556,64sleep30-21swapper/319:08:123
116336228064,10sleep20-21swapper/219:05:582
116359927959,14sleep00-21swapper/019:08:570
115873827761,9sleep10-21swapper/119:05:051
116395099276,16cyclictest228-1kworker/3:1H-kblockd23:30:383
150414222512,10sleep21504497-21kthreadcore23:15:152
1163950992419,3cyclictest0-21swapper/300:30:203
116395099232,18cyclictest1642542-21chrt00:35:203
116395099232,15cyclictest1486486-21sleep23:05:003
1163950992320,1cyclictest0-21swapper/300:25:133
1163950992319,2cyclictest0-21swapper/323:35:153
1163950992318,2cyclictest0-21swapper/321:30:163
116395099222,15cyclictest1277051-21chrt20:55:123
116395099222,13cyclictest1617551-21taskset00:20:253
1163950992219,1cyclictest0-21swapper/300:05:133
1163950992218,2cyclictest0-21swapper/322:10:183
1163950992218,2cyclictest0-21swapper/320:40:163
1163950992214,4cyclictest15863402sleep300:03:103
116395099221,17cyclictest1603560-21taskset00:13:483
14836942210,9sleep014-21ksoftirqd/023:00:560
138403422111,5sleep2431ktimers/222:02:472
116395099219,8cyclictest1427300-21taskset22:29:043
116395099212,14cyclictest1292935-21turbostat21:10:003
1163950992118,1cyclictest0-21swapper/320:50:013
1163950992115,2cyclictest0-21swapper/321:48:143
116395099211,16cyclictest1323670-21chrt21:26:023
116395099211,15cyclictest1566814-21chrt23:50:183
116395099202,12cyclictest1375020-21taskset21:57:013
116395099201,9cyclictest1451869-21taskset22:43:163
1163950992017,1cyclictest0-21swapper/323:25:173
116395099201,15cyclictest1366269-21chrt21:51:363
116395099201,14cyclictest1491897-21chrt23:05:443
116395099201,14cyclictest0-21swapper/323:45:403
116395099200,15cyclictest1433865-21chrt22:31:293
13339762191,8sleep01292912-21diskmemload21:33:460
116395099192,12cyclictest1517151-21taskset23:20:523
116395099192,12cyclictest1393867-21taskset22:09:403
1163950991916,1cyclictest0-21swapper/319:10:143
1163950991915,2cyclictest0-21swapper/319:30:123
116395099191,15cyclictest1342945-21chrt21:39:293
116395099191,15cyclictest0-21swapper/322:01:523
116395099191,14cyclictest1508978-21chrt23:16:113
116395099191,14cyclictest1475029-21chrt22:55:343
116395099191,14cyclictest0-21swapper/321:40:133
116395099191,14cyclictest0-21swapper/321:15:223
116395099191,10cyclictest1461665-21taskset22:50:013
15782422181,3sleep21578257-21ssh23:58:442
14276802181,11sleep01292912-21diskmemload22:29:380
116395099182,12cyclictest1416428-21taskset22:20:343
1163950991815,1cyclictest0-21swapper/320:35:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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