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2026-03-18 - 20:06

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 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 rack5slot3s.osadl.org (updated Wed Mar 18, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
258512238162,24sleep00-21swapper/007:05:560
261462235160,24sleep30-21swapper/307:09:453
260652205169,24sleep10-21swapper/107:08:421
259772205167,25sleep20-21swapper/207:07:352
1981721780,5sleep12626299cyclictest08:05:161
1437621300,4sleep12626299cyclictest09:05:241
26272991191,116cyclictest0-21swapper/312:28:423
2627299112104,2cyclictest0-21swapper/309:13:513
26272999591,3cyclictest0-21swapper/310:00:593
26272999187,3cyclictest0-21swapper/311:47:533
26272996359,3cyclictest0-21swapper/307:59:223
12402550,1sleep10-21swapper/111:05:111
10962500,3sleep22626899cyclictest08:35:232
26272994036,3cyclictest0-21swapper/309:47:013
26272994023,2cyclictest6554-21kworker/3:207:51:143
26272993930,3cyclictest0-21swapper/310:57:343
26262993921,6cyclictest0-21swapper/111:14:541
2626299391,30cyclictest0-21swapper/110:30:381
26258993925,3cyclictest0-21swapper/011:48:220
26262993621,3cyclictest0-21swapper/108:51:581
26262993520,5cyclictest0-21swapper/107:44:301
26262993425,3cyclictest0-21swapper/111:48:221
26262993417,9cyclictest0-21swapper/107:28:501
26262993417,9cyclictest0-21swapper/107:28:501
2626299341,20cyclictest0-21swapper/108:28:301
26272993330,2cyclictest0-21swapper/310:22:073
2626899330,21cyclictest0-21swapper/208:00:182
2626299335,10cyclictest0-21swapper/109:35:181
2625899338,3cyclictest0-21swapper/009:07:340
2625899331,8cyclictest0-21swapper/009:49:580
2625899331,19cyclictest0-21swapper/011:18:260
26272993216,5cyclictest16524-21kworker/3:111:01:243
26272993216,5cyclictest16524-21kworker/3:111:01:243
2625899321,9cyclictest0-21swapper/011:38:140
26258993219,5cyclictest0-21swapper/010:55:020
26258993218,3cyclictest0-21swapper/012:16:460
2627299311,23cyclictest16524-21kworker/3:108:43:333
2626899311,13cyclictest16280-21latency_hist11:40:022
2626299319,10cyclictest8972-21threads11:20:231
2626299311,17cyclictest0-21swapper/109:59:181
2625899318,3cyclictest0-21swapper/008:13:160
26258993123,5cyclictest0-21swapper/011:03:380
26258993123,5cyclictest0-21swapper/011:03:380
26258993117,3cyclictest0-21swapper/011:50:340
26258993114,8cyclictest0-21swapper/009:58:340
2625899311,10cyclictest0-21swapper/007:36:290
26272993018,2cyclictest16524-21kworker/3:109:21:363
2627299300,23cyclictest16524-21kworker/3:108:33:523
2626899300,12cyclictest0-21swapper/208:48:342
2626299305,3cyclictest0-21swapper/107:52:591
2626299303,15cyclictest86550irq/126-enp1s0-09:48:581
2626299301,26cyclictest32734-21processes07:20:221
2626299301,16cyclictest0-21swapper/110:21:021
2625899306,3cyclictest0-21swapper/011:44:340
26258993017,3cyclictest0-21swapper/012:11:580
26258993017,3cyclictest0-21swapper/012:11:580
2625899301,10cyclictest0-21swapper/010:37:120
129312300,2sleep20-21swapper/210:15:282
2627299291,20cyclictest16524-21kworker/3:109:06:163
2626899290,11cyclictest0-21swapper/210:38:072
2626299291,26cyclictest0-21swapper/108:34:121
2626299291,17cyclictest0-21swapper/112:03:421
2626299291,14cyclictest18297-21unixbench_singl08:00:261
2626299291,14cyclictest0-21swapper/110:04:061
2626299291,12cyclictest17574-40dnf10:27:361
2625899296,3cyclictest0-21swapper/009:16:370
2625899294,9cyclictest0-21swapper/012:37:540
26258992917,3cyclictest0-21swapper/007:59:340
26258992916,3cyclictest0-21swapper/009:32:180
2625899291,12cyclictest0-21swapper/009:50:300
2625899291,12cyclictest0-21swapper/009:50:300
2627299287,13cyclictest86750irq/128-enp1s0-12:22:193
2626299286,3cyclictest0-21swapper/107:18:481
2626299281,11cyclictest0-21swapper/111:42:421
2625899286,3cyclictest0-21swapper/008:56:580
2625899285,3cyclictest0-21swapper/007:52:380
2625899285,3cyclictest0-21swapper/007:33:460
2625899282,18cyclictest86750irq/128-enp1s0-09:24:220
2625899281,18cyclictest0-21swapper/007:18:020
2625899281,14cyclictest0-21swapper/011:05:350
2625899281,12cyclictest0-21swapper/008:05:100
2625899281,10cyclictest0-21swapper/010:26:500
2627299279,8cyclictest16524-21kworker/3:110:19:003
2627299278,8cyclictest16524-21kworker/3:108:47:093
2627299277,3cyclictest6554-21kworker/3:208:24:343
2627299276,13cyclictest86750irq/128-enp1s0-10:31:463
2627299272,9cyclictest6554-21kworker/3:207:47:063
2627299271,24cyclictest16524-21kworker/3:109:50:023
2627299271,24cyclictest16524-21kworker/3:109:50:023
2627299271,20cyclictest6554-21kworker/3:207:31:523
2627299270,12cyclictest2699-21kworker/3:211:29:223
2626899270,3cyclictest0-21swapper/209:32:142
2626899270,17cyclictest0-21swapper/210:56:182
2626299271,23cyclictest15531-21df_inode09:10:121
2626299271,13cyclictest0-21swapper/107:37:081
2625899275,3cyclictest0-21swapper/010:48:140
2625899271,9cyclictest0-21swapper/012:09:100
2625899271,9cyclictest0-21swapper/011:24:060
2625899271,12cyclictest0-21swapper/010:01:260
2625899271,11cyclictest0-21swapper/010:21:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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