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2026-04-10 - 16:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 highest latencies:
System rack9slot4s (updated Fri Apr 10, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
258849912091192,14cyclictest24005-21ssh11:45:301
258849911411121,17cyclictest26322-21diskstats07:25:151
258839911361111,21cyclictest26526-21smartctl07:25:170
258232597516,65sleep00-21swapper/007:24:570
253772515418,32sleep10-21swapper/107:20:301
2588399220172,43cyclictest23999-21users11:45:300
85992840,4sleep122-21ksoftirqd/109:16:051
139252810,8sleep12588499cyclictest09:55:231
36532520,4sleep0111rcuc/011:25:170
179522470,10sleep0111rcuc/010:00:110
16262450,8sleep02588399cyclictest09:43:000
25883994425,5cyclictest3-21ksoftirqd/012:46:420
25883994322,10cyclictest3-21ksoftirqd/009:32:160
25883994317,11cyclictest3-21ksoftirqd/010:42:290
25883994222,5cyclictest3-21ksoftirqd/012:34:590
25883994222,5cyclictest3-21ksoftirqd/012:08:150
298292410,3sleep00-21swapper/011:51:560
2588399417,30cyclictest0-21swapper/012:23:550
25883994127,5cyclictest3-21ksoftirqd/011:40:220
25883994124,5cyclictest3-21ksoftirqd/012:51:250
25883994123,6cyclictest3-21ksoftirqd/010:16:060
25883994120,5cyclictest3-21ksoftirqd/011:07:350
2588499404,32cyclictest0-21swapper/112:33:361
25883994025,5cyclictest3-21ksoftirqd/010:49:270
25883994025,5cyclictest3-21ksoftirqd/007:35:300
25883994023,6cyclictest3-21ksoftirqd/012:17:390
25883994023,6cyclictest3-21ksoftirqd/010:08:110
25883994023,6cyclictest3-21ksoftirqd/008:00:070
25883994023,5cyclictest3-21ksoftirqd/012:28:350
25883994020,5cyclictest3-21ksoftirqd/011:17:450
25883994020,5cyclictest3-21ksoftirqd/011:01:410
25883993923,6cyclictest3-21ksoftirqd/009:53:490
25883993923,5cyclictest3-21ksoftirqd/007:30:450
218382391,3sleep121848-21ssh10:36:491
18012391,34sleep12403-21irqbalance09:43:161
2588499386,4cyclictest81rcu_preempt12:04:151
25883993823,5cyclictest3-21ksoftirqd/010:55:420
25883993823,5cyclictest3-21ksoftirqd/009:15:540
25883993822,6cyclictest3-21ksoftirqd/009:13:270
25883993822,5cyclictest3-21ksoftirqd/008:59:040
25883993822,5cyclictest3-21ksoftirqd/008:29:510
25883993819,5cyclictest3-21ksoftirqd/011:14:560
25883993819,5cyclictest3-21ksoftirqd/010:54:260
25883993818,5cyclictest3-21ksoftirqd/011:36:220
25883993818,5cyclictest3-21ksoftirqd/010:38:280
25883993818,5cyclictest3-21ksoftirqd/009:55:520
25883993818,5cyclictest3-21ksoftirqd/009:35:370
62582370,8sleep02588399cyclictest09:47:320
62582370,8sleep02588399cyclictest09:47:320
2588499375,28cyclictest0-21swapper/110:04:561
2588499373,31cyclictest0-21swapper/108:43:561
2588499373,31cyclictest0-21swapper/108:12:171
25883993722,5cyclictest3-21ksoftirqd/012:11:360
25883993722,5cyclictest3-21ksoftirqd/010:33:020
25883993722,5cyclictest3-21ksoftirqd/010:33:020
25883993722,5cyclictest3-21ksoftirqd/008:07:150
25883993721,5cyclictest3-21ksoftirqd/010:11:510
25883993721,5cyclictest3-21ksoftirqd/009:04:520
25883993720,13cyclictest3-21ksoftirqd/011:24:270
70112361,4sleep07133-21users07:55:300
2588499364,29cyclictest9528-21cron10:25:001
25883993621,5cyclictest3-21ksoftirqd/012:41:410
25883993621,5cyclictest3-21ksoftirqd/009:23:480
25883993621,5cyclictest3-21ksoftirqd/009:08:370
25883993613,7cyclictest3-21ksoftirqd/012:04:150
167832361,4sleep116795-21ntp_states12:45:251
135442361,31sleep113556-21sh12:41:511
106752361,31sleep010747-21cat10:25:240
53102351,29sleep15320-21ssh10:53:391
2588499354,4cyclictest81rcu_preempt09:54:561
25883993519,5cyclictest3-21ksoftirqd/008:50:190
25883993518,6cyclictest3-21ksoftirqd/008:21:490
25883993518,4cyclictest3-21ksoftirqd/009:29:060
214562351,4sleep121603-21users12:50:281
2588499344,4cyclictest81rcu_preempt12:25:411
2588499344,4cyclictest81rcu_preempt09:29:431
2588499343,27cyclictest480-21tune2fs07:40:161
25884993425,6cyclictest0-21swapper/108:59:361
2588499342,29cyclictest0-21swapper/112:09:361
2588499342,26cyclictest18945-21chrt08:30:001
2588499341,29cyclictest19128-21ssh11:07:361
25883993419,6cyclictest3-21ksoftirqd/008:46:130
25883993419,5cyclictest3-21ksoftirqd/008:31:160
25883993419,5cyclictest3-21ksoftirqd/008:19:360
2588399341,30cyclictest0-21swapper/007:51:360
2588399341,28cyclictest2309-21cron12:40:000
25822341,29sleep02616-21iostat07:45:170
2588499334,4cyclictest81rcu_preempt11:54:201
2588499334,4cyclictest81rcu_preempt11:33:491
2588499334,4cyclictest81rcu_preempt09:48:261
2588499334,4cyclictest81rcu_preempt09:48:261
2588499333,5cyclictest81rcu_preempt12:37:071
2588499333,4cyclictest81rcu_preempt11:42:201
2588499332,28cyclictest0-21swapper/110:34:551
2588499332,28cyclictest0-21swapper/110:34:551
25884993316,14cyclictest22-21ksoftirqd/111:28:041
2588499331,5cyclictest0-21swapper/107:33:351
2588499331,29cyclictest0-21swapper/111:38:551
2588499331,29cyclictest0-21swapper/111:20:561
2588499331,29cyclictest0-21swapper/111:16:161
2588399338,14cyclictest3-21ksoftirqd/011:33:520
25883993318,5cyclictest3-21ksoftirqd/008:36:080
25883993317,5cyclictest3-21ksoftirqd/010:21:250
25883993317,5cyclictest3-21ksoftirqd/007:41:060
25883993310,14cyclictest3-21ksoftirqd/011:55:520
2588499326,4cyclictest81rcu_preempt10:15:421
2588499325,4cyclictest81rcu_preempt12:18:291
2588499325,4cyclictest81rcu_preempt09:24:431
2588499324,4cyclictest81rcu_preempt10:10:341
2588499324,4cyclictest81rcu_preempt09:33:421
2588499323,4cyclictest81rcu_preempt12:23:391
2588499323,4cyclictest81rcu_preempt11:59:361
2588499322,26cyclictest30950-21tune2fs07:35:161
2588499321,4cyclictest81rcu_preempt10:25:371
2588499321,28cyclictest0-21swapper/108:53:351
2588499320,4cyclictest81rcu_preempt12:12:491
25883993216,5cyclictest3-21ksoftirqd/008:42:590
8292311,26sleep1974-21unixbench_singl09:05:291
2588499314,4cyclictest81rcu_preempt09:38:561
2588499313,4cyclictest81rcu_preempt10:07:391
2588499313,4cyclictest81rcu_preempt07:53:221
2588499312,5cyclictest0-21swapper/111:10:071
2588499311,5cyclictest0-21swapper/110:48:561
2588499311,4cyclictest81rcu_preempt07:56:331
2588499311,4cyclictest0-21swapper/108:06:351
25884993114,14cyclictest22-21ksoftirqd/109:11:581
2588499305,4cyclictest81rcu_preempt08:49:411
91162291,5sleep10-21swapper/108:01:161
85112291,5sleep10-21swapper/110:56:171
25884992924,3cyclictest0-21swapper/110:42:561
2588499291,4cyclictest81rcu_preempt11:01:371
37162281,5sleep10-21swapper/107:48:531
318752281,5sleep10-21swapper/109:03:111
207392281,5sleep10-21swapper/108:34:561
25884992718,5cyclictest16240-21sendmail_mailqu08:20:271
25883992712,5cyclictest3-21ksoftirqd/008:13:310
221792271,5sleep10-21swapper/108:35:291
151012251,5sleep10-21swapper/108:20:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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