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2026-06-03 - 01:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Tue Jun 02, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18916210349,48sleep20-21swapper/207:08:542
1886729961,33sleep00-21swapper/007:08:150
1866929068,6sleep10-21swapper/107:05:401
1867128369,9sleep30-21swapper/307:05:413
1909599280,0cyclictest0-21swapper/310:26:393
1908599270,27cyclictest0-21swapper/009:46:120
19095992625,1cyclictest39-21ksoftirqd/312:27:263
1909599250,24cyclictest0-21swapper/310:03:333
1909599240,0cyclictest0-21swapper/310:21:483
1909599240,0cyclictest0-21swapper/310:17:093
19095992322,1cyclictest0-21swapper/311:59:063
1909599230,1cyclictest0-21swapper/311:11:113
1909499230,20cyclictest0-21swapper/210:55:342
1908999230,22cyclictest0-21swapper/110:17:091
19085992322,1cyclictest0-21swapper/012:18:020
1909599221,2cyclictest0-21swapper/309:34:163
1908999221,20cyclictest1354-21ssh10:40:191
1908999220,3cyclictest0-21swapper/109:32:101
1908999220,18cyclictest0-21swapper/111:58:501
19095992119,2cyclictest39-21ksoftirqd/312:01:333
19094992116,5cyclictest32126-21kworker/u8:209:55:292
19094992113,4cyclictest225-21systemd-journal07:45:002
19089992120,1cyclictest0-21swapper/112:07:441
1908999210,21cyclictest0-21swapper/110:26:391
1908599215,8cyclictest0-21swapper/010:15:140
1908599213,14cyclictest30020-21ssh09:40:130
1908599213,14cyclictest30020-21ssh09:40:130
1909599200,2cyclictest0-21swapper/312:36:353
1908999202,1cyclictest12105-21diskmemload11:02:121
1908999202,1cyclictest0-21swapper/111:41:041
1908999200,19cyclictest0-21swapper/109:41:461
1908999200,19cyclictest0-21swapper/109:41:461
1909599190,18cyclictest0-21swapper/311:02:393
1909499191,17cyclictest0-21swapper/212:39:372
1908999190,1cyclictest0-21swapper/110:03:331
1908999190,17cyclictest0-21swapper/110:38:401
1909599180,0cyclictest0-21swapper/310:09:363
19094991816,2cyclictest0-21swapper/210:17:212
1909499181,1cyclictest0-21swapper/210:00:222
1909499180,2cyclictest0-21swapper/211:52:122
1909499180,17cyclictest0-21swapper/207:55:142
1908999180,1cyclictest0-21swapper/112:02:511
1908999180,1cyclictest0-21swapper/111:51:491
1908999180,17cyclictest0-21swapper/109:57:001
1908999180,15cyclictest0-21swapper/110:47:011
1908599180,18cyclictest0-21swapper/012:07:540
1909599171,0cyclictest0-21swapper/311:36:433
1908999170,1cyclictest0-21swapper/112:30:001
1908999170,1cyclictest0-21swapper/110:21:481
19085991716,1cyclictest0-21swapper/010:53:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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