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2026-05-21 - 00:24

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 100 highest latencies:
System rack7slot7s.osadl.org (updated Wed May 20, 2026 12:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2483321130,0sleep10-21swapper/109:20:131
13955210086,9sleep00-21swapper/007:08:590
1401429279,9sleep20-21swapper/207:09:442
1345828563,6sleep30-21swapper/307:05:273
1373228264,14sleep10-21swapper/107:06:061
1412899290,3cyclictest141rcu_preempt10:11:193
1412899290,3cyclictest141rcu_preempt10:11:193
1412399240,1cyclictest0-21swapper/112:30:131
1412899230,22cyclictest0-21swapper/311:07:573
1412399230,2cyclictest0-21swapper/110:00:121
1412899220,3cyclictest0-21swapper/310:32:163
14125992220,2cyclictest0-21swapper/209:59:132
1412399220,1cyclictest0-21swapper/111:06:271
1411999220,19cyclictest0-21swapper/010:32:170
1412599210,15cyclictest29669-21df10:40:142
1412399215,3cyclictest141rcu_preempt09:30:011
14123992117,4cyclictest241rcuc/107:25:251
1411999210,20cyclictest0-21swapper/009:36:470
14125992019,1cyclictest0-21swapper/209:50:152
1412599200,14cyclictest0-21swapper/209:43:252
1412399202,1cyclictest23244-21ssh09:57:421
1412399200,1cyclictest0-21swapper/111:50:021
1412399200,1cyclictest0-21swapper/110:38:501
1411999200,19cyclictest0-21swapper/009:32:380
1412399191,9cyclictest0-21swapper/111:10:141
14123991918,1cyclictest7076-21diskmemload09:44:011
1412399190,19cyclictest0-21swapper/109:30:531
1412899183,10cyclictest39-21ksoftirqd/309:59:463
1412899180,18cyclictest0-21swapper/311:10:053
1412899180,0cyclictest0-21swapper/310:55:473
1412599182,15cyclictest12540-21cstates10:30:132
14123991812,6cyclictest0-21swapper/111:03:511
1412399180,1cyclictest0-21swapper/111:27:101
14128991712,5cyclictest10377-21apache212:17:543
1412599170,17cyclictest0-21swapper/209:14:302
1412599170,16cyclictest0-21swapper/211:17:302
14123991715,2cyclictest7076-21diskmemload12:06:331
1412399171,14cyclictest7076-21diskmemload12:29:001
1412399170,2cyclictest0-21swapper/111:21:151
1412399170,17cyclictest0-21swapper/111:47:411
14119991715,1cyclictest13-21ksoftirqd/010:05:230
14119991710,4cyclictest21723-21apt-get07:25:130
1412899162,9cyclictest7076-21diskmemload11:04:093
1412899161,9cyclictest0-21swapper/307:25:143
1412899161,5cyclictest0-21swapper/311:24:283
1412899160,16cyclictest0-21swapper/310:40:363
1412599160,13cyclictest0-21swapper/211:12:472
1412399165,6cyclictest21907-21apt-get10:55:141
14123991616,0cyclictest0-21swapper/110:15:111
14123991615,1cyclictest7076-21diskmemload10:44:241
1412399160,15cyclictest0-21swapper/111:35:111
1411999165,1cyclictest141rcu_preempt09:56:450
14119991615,1cyclictest0-21swapper/012:10:270
14119991614,2cyclictest13-21ksoftirqd/011:17:530
1411999160,1cyclictest0-21swapper/011:45:110
1411999160,16cyclictest0-21swapper/008:16:050
1412899153,11cyclictest7076-21diskmemload10:18:503
1412899153,0cyclictest0-21swapper/311:34:453
14128991515,0cyclictest0-21swapper/309:15:123
1412899151,13cyclictest6711-21sensors10:45:243
14128991511,3cyclictest39-21ksoftirqd/311:17:093
1412899150,1cyclictest141rcu_preempt10:05:213
1412599153,11cyclictest1142-21runrttasks10:15:512
14125991514,1cyclictest0-21swapper/211:46:142
14125991510,5cyclictest0-21swapper/209:31:092
14125991510,3cyclictest16749-21wc08:20:192
1412599150,14cyclictest5437-21sensors10:25:232
1412399153,11cyclictest1615-21/usr/sbin/munin11:40:211
1411999150,1cyclictest0-21swapper/009:24:390
1412899149,2cyclictest0-21swapper/311:43:223
1412899147,2cyclictest141rcu_preempt09:10:253
1412899143,10cyclictest0-21swapper/312:25:323
1412899142,10cyclictest39-21ksoftirqd/312:31:583
14128991410,1cyclictest39-21ksoftirqd/309:48:323
1412899140,3cyclictest0-21swapper/308:55:283
1412899140,1cyclictest141rcu_preempt10:02:323
1412899140,1cyclictest0-21swapper/310:52:523
1412599142,10cyclictest29814-21/usr/sbin/munin10:20:262
14125991413,1cyclictest0-21swapper/210:03:022
14125991412,1cyclictest0-21swapper/209:17:032
14125991410,3cyclictest13659-21grep10:50:142
14125991410,2cyclictest2075-21sed11:40:252
14125991410,2cyclictest1616-21grep12:00:152
1412599140,14cyclictest0-21swapper/211:52:232
1412399149,1cyclictest0-21swapper/109:19:291
1412399148,5cyclictest1235-21ntpd11:55:201
1412399148,5cyclictest0-21swapper/109:54:401
1412399145,9cyclictest24258-21irqstats11:15:181
1412399142,2cyclictest10397-21apache210:25:111
14123991412,2cyclictest25-21ksoftirqd/109:14:021
14123991411,2cyclictest17627-21uniq07:15:181
1412399140,1cyclictest0-21swapper/110:53:561
1412399140,12cyclictest0-21swapper/111:31:441
1411999142,2cyclictest0-21swapper/010:19:080
14119991413,1cyclictest0-21swapper/012:09:310
14119991410,3cyclictest10858-21cat08:10:000
1411999140,13cyclictest0-21swapper/011:34:450
1412899138,1cyclictest39-21ksoftirqd/309:54:203
1412899135,4cyclictest39-21ksoftirqd/310:35:253
14128991312,1cyclictest0-21swapper/312:00:383
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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