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2026-07-09 - 03:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Thu Jul 09, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
83882240165,23sleep20-21swapper/219:09:512
80362222192,20sleep10-21swapper/119:05:271
81292202165,25sleep00-21swapper/019:06:270
81222201164,25sleep30-21swapper/319:06:223
3116921790,4sleep1849199cyclictest21:10:241
3116921790,4sleep1849199cyclictest21:10:241
1630921620,3sleep3850399cyclictest19:25:123
136721530,5sleep1849199cyclictest22:30:231
2837421510,5sleep2849699cyclictest23:32:202
2837421510,5sleep2849699cyclictest23:32:202
8496991091,2cyclictest0-21swapper/221:15:592
849699105101,3cyclictest0-21swapper/220:33:062
322882640,1sleep00-21swapper/021:15:130
322122510,3sleep332216-21latency20:00:193
174642480,2sleep20-21swapper/221:55:122
152362480,2sleep10-21swapper/119:20:241
39072450,2sleep10-21swapper/122:35:241
8503994426,3cyclictest0-21swapper/300:20:593
8496994340,2cyclictest0-21swapper/222:57:432
8496994127,9cyclictest0-21swapper/220:20:012
8496994026,2cyclictest0-21swapper/223:20:202
849699401,21cyclictest0-21swapper/223:01:352
849699401,13cyclictest0-21swapper/200:35:272
848699391,26cyclictest23725-21kworker/0:219:10:230
849699381,30cyclictest0-21swapper/219:55:092
8503993720,3cyclictest13786-21users20:30:273
849699371,20cyclictest0-21swapper/200:13:512
8486993710,13cyclictest21400-21perf22:05:010
849699361,25cyclictest0-21swapper/220:59:272
849699351,32cyclictest0-21swapper/219:14:252
850399341,13cyclictest6581-21switchtime23:55:233
8496993417,3cyclictest21978-21strings20:50:192
849699341,26cyclictest0-21swapper/221:04:112
849699341,23cyclictest0-21swapper/200:30:192
849699340,12cyclictest0-21swapper/222:11:092
121942340,2sleep20-21swapper/219:15:162
8503993319,3cyclictest0-21swapper/319:40:343
849699331,9cyclictest14125-21dnf19:20:142
8496993319,4cyclictest0-21swapper/220:35:552
849699331,2cyclictest0-21swapper/219:33:492
849699331,23cyclictest0-21swapper/219:39:132
849699331,20cyclictest0-21swapper/223:58:112
849699331,19cyclictest0-21swapper/221:51:432
8503993217,6cyclictest0-21swapper/319:50:293
850399321,20cyclictest0-21swapper/321:19:433
850399320,28cyclictest29558-21diskmemload21:49:113
8496993217,3cyclictest0-21swapper/222:25:192
849699321,24cyclictest0-21swapper/200:03:472
849699321,22cyclictest0-21swapper/221:10:162
849699321,22cyclictest0-21swapper/221:10:152
849699321,19cyclictest0-21swapper/223:40:152
849699321,12cyclictest0-21swapper/223:52:552
849699321,12cyclictest0-21swapper/223:49:512
849699320,21cyclictest0-21swapper/221:30:512
8486993211,8cyclictest7240-21kworker/0:120:40:150
849699311,22cyclictest0-21swapper/223:28:592
849699311,18cyclictest0-21swapper/222:43:352
849699311,17cyclictest11616-21netstat21:40:192
848699311,15cyclictest6617-21idleruntime-cro22:45:010
8503993019,3cyclictest0-21swapper/321:01:353
8503993018,3cyclictest0-21swapper/319:14:253
850399301,12cyclictest0-21swapper/319:47:533
8496993027,2cyclictest0-21swapper/219:42:172
849699301,21cyclictest0-21swapper/200:15:472
849699301,20cyclictest0-21swapper/221:27:162
849699301,19cyclictest0-21swapper/220:06:132
849699301,14cyclictest0-21swapper/223:16:522
849699301,14cyclictest0-21swapper/200:05:352
849699301,12cyclictest0-21swapper/222:05:352
848699304,12cyclictest24851-21perf00:40:020
848699301,24cyclictest19680-21kworker/0:123:14:410
23192300,6sleep081ktimersoftd/020:05:230
8503992920,3cyclictest0-21swapper/319:33:493
8503992912,8cyclictest0-21swapper/320:35:313
850399291,18cyclictest0-21swapper/321:40:273
850399290,13cyclictest0-21swapper/323:38:513
849699291,20cyclictest0-21swapper/222:03:032
849699291,13cyclictest0-21swapper/220:20:172
849699291,12cyclictest0-21swapper/221:47:112
849699291,12cyclictest0-21swapper/219:51:012
849699291,12cyclictest0-21swapper/219:29:412
849699291,11cyclictest0-21swapper/222:15:592
848699295,14cyclictest87650irq/129-enp1s0-22:10:390
850399281,10cyclictest0-21swapper/321:35:173
8496992816,3cyclictest0-21swapper/200:27:392
849699281,11cyclictest0-21swapper/223:38:152
849699281,10cyclictest0-21swapper/221:36:132
849699280,12cyclictest0-21swapper/220:25:452
848699282,18cyclictest5764-21kworker/0:121:28:410
848699282,10cyclictest12478-21kworker/0:121:50:210
850399273,8cyclictest0-21swapper/319:37:463
849699270,10cyclictest0-21swapper/223:05:232
849199279,4cyclictest827-21runrttasks19:29:071
849199271,12cyclictest0-21swapper/123:43:471
848699278,16cyclictest20458-21awk00:30:010
848699271,9cyclictest27888-21kworker/0:022:21:500
848699271,13cyclictest16050-21munin-run00:20:000
848699271,11cyclictest26481-21kworker/0:319:53:550
848699271,10cyclictest2673-21kworker/0:023:59:290
848699271,10cyclictest12478-21kworker/0:121:49:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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