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2026-05-11 - 21:26

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 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 100 highest latencies:
System rack7slot7s.osadl.org (updated Mon May 11, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1093729949,45sleep00-21swapper/007:08:180
1079129466,8sleep30-21swapper/307:06:243
1083729380,9sleep20-21swapper/207:07:012
1084129275,13sleep10-21swapper/107:07:041
99302690,0sleep20-21swapper/210:49:342
1116099300,29cyclictest0-21swapper/210:32:592
1115699300,1cyclictest0-21swapper/110:52:101
1116299290,28cyclictest26571-21grep12:35:283
1116099290,28cyclictest0-21swapper/210:41:492
1116099290,28cyclictest0-21swapper/209:14:372
1116299280,24cyclictest0-21swapper/312:14:593
1116299270,26cyclictest0-21swapper/310:14:023
1116299270,26cyclictest0-21swapper/309:05:133
1116299270,25cyclictest0-21swapper/309:15:153
1116299270,20cyclictest0-21swapper/312:06:433
1116099270,26cyclictest0-21swapper/209:05:132
1116299260,25cyclictest0-21swapper/311:25:003
1116099260,25cyclictest0-21swapper/211:50:132
1116099260,25cyclictest0-21swapper/210:55:142
1115699260,26cyclictest0-21swapper/109:37:111
1116299254,20cyclictest26417-21ssh10:40:133
1116099255,19cyclictest3742-21diskmemload12:21:172
11160992518,6cyclictest55650irq/127-enp2s0-11:19:162
1116099251,23cyclictest3742-21diskmemload10:23:442
1116099250,24cyclictest3742-21diskmemload09:56:532
1116099250,24cyclictest0-21swapper/212:30:152
1116099250,24cyclictest0-21swapper/209:52:202
1116099250,19cyclictest0-21swapper/209:00:132
1116299241,22cyclictest16823-21runrttasks09:36:033
1116299241,16cyclictest0-21swapper/309:30:553
1116299240,7cyclictest0-21swapper/311:40:473
1116299240,22cyclictest3742-21diskmemload09:43:453
1116299240,20cyclictest3742-21diskmemload10:07:473
1116299240,20cyclictest0-21swapper/308:45:143
1116099247,15cyclictest3742-21diskmemload12:13:472
1116099240,21cyclictest0-21swapper/209:20:112
1116099240,20cyclictest0-21swapper/211:10:312
1116299236,16cyclictest3742-21diskmemload10:51:273
1116299231,21cyclictest0-21swapper/311:50:133
1116299231,19cyclictest3742-21diskmemload10:24:053
1116299230,22cyclictest0-21swapper/311:19:543
1116099231,21cyclictest3742-21diskmemload11:57:332
1116099231,17cyclictest4609-21date11:25:002
1116099230,3cyclictest0-21swapper/210:16:192
1116099230,23cyclictest0-21swapper/211:02:152
1116099230,23cyclictest0-21swapper/210:36:452
1116099230,22cyclictest3742-21diskmemload09:30:232
1116099230,22cyclictest0-21swapper/209:15:152
1116099230,19cyclictest0-21swapper/209:45:122
1116099230,18cyclictest0-21swapper/208:45:142
1115699231,5cyclictest0-21swapper/111:10:321
1116299221,20cyclictest3742-21diskmemload10:16:433
1116299221,19cyclictest3742-21diskmemload11:35:563
1116299220,21cyclictest3742-21diskmemload09:21:503
1116299220,21cyclictest0-21swapper/311:45:223
1116099223,18cyclictest3742-21diskmemload10:02:102
1116099222,17cyclictest3742-21diskmemload12:35:462
1116099221,20cyclictest5274-21expr11:25:142
1116099221,20cyclictest0-21swapper/208:15:112
1116099220,15cyclictest0-21swapper/211:48:292
1115699220,21cyclictest0-21swapper/111:33:091
1115699220,1cyclictest0-21swapper/110:06:391
1116299214,16cyclictest19426-21apache_processe10:55:143
1116299212,18cyclictest3742-21diskmemload10:04:123
1116299212,16cyclictest3742-21diskmemload09:25:223
1116299211,19cyclictest0-21swapper/311:00:133
1116299210,20cyclictest0-21swapper/308:10:133
1116299210,19cyclictest0-21swapper/311:08:393
1116299210,18cyclictest0-21swapper/309:56:343
1116299210,16cyclictest0-21swapper/308:15:113
1116099215,15cyclictest3742-21diskmemload12:26:532
1116099211,19cyclictest3742-21diskmemload09:41:192
1116299201,18cyclictest3742-21diskmemload10:33:373
1116299200,18cyclictest0-21swapper/309:49:143
1116299200,13cyclictest0-21swapper/311:32:383
1116099202,9cyclictest12691-21sh10:12:332
1116099202,17cyclictest3742-21diskmemload12:19:212
1116099201,11cyclictest0-21swapper/212:00:352
1115699209,1cyclictest0-21swapper/109:25:111
1115699207,4cyclictest0-21swapper/109:22:481
1115699203,16cyclictest0-21swapper/109:42:181
1115699200,19cyclictest0-21swapper/109:15:301
1116299198,8cyclictest26006-21sh12:15:493
1116299197,9cyclictest3571-21rm12:22:033
1116299193,15cyclictest3742-21diskmemload11:27:193
1116299191,17cyclictest0-21swapper/310:25:133
1116299190,18cyclictest3742-21diskmemload11:56:403
1116299190,18cyclictest0-21swapper/309:14:253
1116299190,16cyclictest0-21swapper/309:00:133
1116099192,16cyclictest3742-21diskmemload10:27:032
1116099192,16cyclictest3742-21diskmemload09:36:032
1116099192,16cyclictest30547-21latency_hist07:50:012
1116099192,12cyclictest7825-21aten2_r7power_c08:10:152
1116099190,19cyclictest0-21swapper/209:25:252
1116099190,18cyclictest7553-21grep12:05:182
1116099190,18cyclictest0-21swapper/211:35:562
1116099190,18cyclictest0-21swapper/208:40:132
1116099190,16cyclictest3742-21diskmemload11:08:382
1116099190,15cyclictest0-21swapper/211:30:132
1116299188,10cyclictest3742-21diskmemload10:35:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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