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2026-05-10 - 01:36

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Sun May 10, 2026 00:46:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21012642403397,4sleep110-21swapper/1119:08:083
21011922383363,13sleep20-21swapper/219:07:118
21010642367310,14sleep150-21swapper/1519:05:327
21013272357341,10sleep130-21swapper/1319:09:005
21013222354335,13sleep80-21swapper/819:08:5414
21011742352332,13sleep10-21swapper/119:06:551
21011652350329,14sleep90-21swapper/919:06:4615
21010982349328,14sleep60-21swapper/619:05:5612
21010872348334,9sleep140-21swapper/1419:05:476
21011032347327,13sleep100-21swapper/1019:05:592
21013342346326,13sleep30-21swapper/319:09:059
21011182346324,14sleep70-21swapper/719:06:1313
21011772345326,13sleep40-21swapper/419:06:5710
21012412344323,14sleep50-21swapper/519:07:4711
21013092343323,13sleep120-21swapper/1219:08:424
21013752340320,13sleep00-21swapper/019:09:350
24544602460,0chrt0-21swapper/500:24:3111
2101878993837,1cyclictest2342643-21kworker/u32:1+events_unbound23:10:222
2101884993434,0cyclictest0-21swapper/1219:24:084
210189399339,11cyclictest0-21swapper/1421:38:576
210189399338,11cyclictest0-21swapper/1419:38:086
2101878993329,0cyclictest2428550-21kworker/10:1+events00:09:322
2101878993329,0cyclictest2428550-21kworker/10:1+events00:09:312
2101863993333,0cyclictest0-21swapper/522:47:2311
2101851993333,0cyclictest0-21swapper/120:35:311
2101851993333,0cyclictest0-21swapper/120:01:531
2101851993333,0cyclictest0-21swapper/119:27:041
2101884993232,0cyclictest0-21swapper/1223:18:534
2101884993232,0cyclictest0-21swapper/1221:06:484
2101884993232,0cyclictest0-21swapper/1221:06:484
2101878993232,0cyclictest0-21swapper/1023:40:592
2101878993229,2cyclictest2159559-21kworker/10:1+events20:55:132
210186999320,29cyclictest0-21swapper/722:00:1513
210185399320,29cyclictest0-21swapper/222:50:128
2101851993232,0cyclictest0-21swapper/120:31:541
2101851993231,1cyclictest0-21swapper/120:45:551
2101851993231,0cyclictest0-21swapper/121:15:161
210189799310,30cyclictest0-21swapper/1523:55:097
210189399310,30cyclictest0-21swapper/1423:10:146
210189399310,30cyclictest0-21swapper/1420:25:156
2101888993130,1cyclictest0-21swapper/1300:00:065
210188899310,30cyclictest0-21swapper/1321:41:585
2101884993131,0cyclictest0-21swapper/1219:27:034
210188299310,30cyclictest0-21swapper/1122:53:003
210188299310,30cyclictest0-21swapper/1122:02:233
210188299310,30cyclictest0-21swapper/1121:38:273
2101878993130,1cyclictest2227081-21kworker/10:0+events22:59:532
2101878993130,1cyclictest2227081-21kworker/10:0+events22:38:112
2101878993130,1cyclictest2227081-21kworker/10:0+events22:05:082
2101878993130,1cyclictest2159559-21kworker/10:1+events21:19:402
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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