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2026-03-10 - 11:42

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 Tue Mar 10, 2026 00:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13749032438417,13sleep140-21swapper/1419:09:496
13747302374316,14sleep100-21swapper/1019:07:372
13746192368361,5sleep40-21swapper/419:06:0910
13746182359351,5sleep30-21swapper/319:06:099
13749012357316,14sleep120-21swapper/1219:09:464
13747102355336,13sleep90-21swapper/919:07:2015
13748302353334,12sleep60-21swapper/619:08:5212
13746952352332,13sleep150-21swapper/1519:07:097
13748702350330,13sleep50-21swapper/519:09:2311
13747552350330,13sleep110-21swapper/1119:07:533
13747272349329,13sleep70-21swapper/719:07:3413
13747212348329,13sleep10-21swapper/119:07:281
13748782347326,14sleep130-21swapper/1319:09:315
13747522345325,13sleep80-21swapper/819:07:5114
13747012345326,13sleep20-21swapper/219:07:128
13746152345325,13sleep00-21swapper/019:06:060
1375321999837,31cyclictest0-21swapper/020:22:000
1375349999336,28cyclictest0-21swapper/1020:22:002
1375356998931,30cyclictest0-21swapper/1220:22:014
1375326998830,29cyclictest0-21swapper/220:22:008
1375347998628,28cyclictest0-21swapper/920:22:0115
1375344996968,1cyclictest3318-21Xorg20:22:0014
1375342996810,28cyclictest0-21swapper/720:22:0113
137533299591,14cyclictest0-21swapper/420:22:0110
1375326994946,0cyclictest0-21swapper/222:28:168
1375363994624,9cyclictest0-21swapper/1420:23:116
137536399459,11cyclictest0-21swapper/1419:39:166
137532899440,44cyclictest0-21swapper/320:22:009
1375326994443,0cyclictest0-21swapper/223:39:308
1375326994410,31cyclictest1374996-21kworker/2:1-events21:23:068
1375337994342,1cyclictest3318-21Xorg20:21:5912
1375363994242,0cyclictest0-21swapper/1422:31:046
1375326994240,0cyclictest0-21swapper/200:16:048
1375326994213,29cyclictest0-21swapper/200:08:408
1375326994141,0cyclictest0-21swapper/223:32:448
1375326994141,0cyclictest0-21swapper/221:17:328
1375326994112,29cyclictest0-21swapper/223:52:568
1375363994040,0cyclictest0-21swapper/1422:07:526
137536399402,13cyclictest0-21swapper/1420:12:136
1375326994038,2cyclictest1572205-21kworker/2:0-events23:16:488
1375326994011,0cyclictest0-21swapper/222:50:198
137536399391,25cyclictest0-21swapper/1420:34:106
1375326993938,1cyclictest1374996-21kworker/2:1-events21:40:028
1375326993938,1cyclictest1374996-21kworker/2:1-events21:40:028
1375326993910,29cyclictest0-21swapper/200:22:128
1375358993736,1cyclictest1531595-21kworker/u32:1+events_unbound22:00:225
137532699378,0cyclictest0-21swapper/222:21:408
1375326993735,2cyclictest1572205-21kworker/2:0-events23:20:028
1375323993736,1cyclictest3318-21Xorg20:22:011
137532699368,0cyclictest0-21swapper/221:46:518
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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