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2026-03-31 - 01:01

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 Mon Mar 30, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
218159910801071,6cyclictest0-21swapper/107:27:331
214812541461,64sleep00-21swapper/007:22:040
209352539491,32sleep10-21swapper/107:20:281
21814992451,240cyclictest0-21swapper/007:27:330
79822930,4sleep10-21swapper/111:34:171
238162810,7sleep12181599cyclictest09:35:561
296212760,3sleep041ktimersoftd/011:55:400
296212760,3sleep041ktimersoftd/011:55:390
158522750,3sleep041ktimersoftd/011:08:490
51632470,4sleep1211ktimersoftd/112:37:591
9562460,8sleep02181499cyclictest10:53:260
194722461,28sleep019552-21memory10:05:230
291372450,3sleep0111rcuc/010:49:120
90412440,4sleep1211ktimersoftd/109:55:091
21814994419,10cyclictest0-21swapper/011:23:320
21814994326,5cyclictest3-21ksoftirqd/012:40:390
21814994222,5cyclictest3-21ksoftirqd/009:49:510
21814994122,5cyclictest3-21ksoftirqd/009:31:130
183622411,5sleep118372-21ssh12:52:151
21815994028,8cyclictest0-21swapper/112:18:161
21814994025,4cyclictest3-21ksoftirqd/012:37:000
21814994024,5cyclictest3-21ksoftirqd/009:39:170
21814994023,6cyclictest3-21ksoftirqd/008:51:410
21814994021,5cyclictest3-21ksoftirqd/012:29:360
233402391,34sleep023350-21ssh11:15:420
2181599391,9cyclictest0-21swapper/109:44:161
21814993923,6cyclictest3-21ksoftirqd/011:40:140
21814993923,6cyclictest3-21ksoftirqd/009:12:260
21814993923,5cyclictest3-21ksoftirqd/011:47:470
21814993923,5cyclictest3-21ksoftirqd/010:59:180
21814993922,6cyclictest3-21ksoftirqd/008:18:370
21814993922,4cyclictest3-21ksoftirqd/010:03:000
21814993921,6cyclictest3-21ksoftirqd/009:50:530
21814993919,5cyclictest3-21ksoftirqd/012:32:220
21814993823,5cyclictest3-21ksoftirqd/012:08:130
21814993823,5cyclictest3-21ksoftirqd/010:40:350
21814993822,5cyclictest3-21ksoftirqd/010:39:170
21814993817,5cyclictest3-21ksoftirqd/011:04:220
2181599377,5cyclictest81rcu_preempt09:15:051
2181599373,5cyclictest0-21swapper/110:42:561
21815993726,8cyclictest0-21swapper/110:02:161
2181599371,18cyclictest0-21swapper/110:30:291
21814993728,5cyclictest0-21swapper/010:28:360
21814993723,4cyclictest3-21ksoftirqd/011:39:050
21814993722,5cyclictest3-21ksoftirqd/012:20:330
21814993722,5cyclictest3-21ksoftirqd/009:41:000
21814993722,5cyclictest3-21ksoftirqd/009:16:560
21814993722,4cyclictest3-21ksoftirqd/009:23:070
21814993720,5cyclictest3-21ksoftirqd/007:39:320
129712371,3sleep112981-21ssh12:45:321
2181599367,4cyclictest29867-21diskmemload09:26:181
2181499362,30cyclictest31958-21hddtemp_smartct11:25:160
21814993619,6cyclictest3-21ksoftirqd/007:40:380
2181499361,31cyclictest17284-21tune2fs08:35:150
2181599355,4cyclictest81rcu_preempt12:31:111
2181599351,30cyclictest20222-21fschecks_count12:20:161
2181499352,29cyclictest0-21swapper/012:49:160
21814993520,5cyclictest3-21ksoftirqd/010:33:080
21814993520,5cyclictest3-21ksoftirqd/010:10:290
21814993519,6cyclictest3-21ksoftirqd/008:11:130
21814993519,5cyclictest3-21ksoftirqd/011:52:160
2181499351,5cyclictest11882-21seq12:10:510
74552341,29sleep17589-21df11:00:121
57762341,30sleep15790-21ssh10:58:131
32162341,29sleep13227-21ssh11:29:251
281752341,4sleep128304-21cpuspeed_turbos09:05:121
277492341,29sleep127760-21ssh12:27:521
2181599349,5cyclictest81rcu_preempt12:11:151
2181599347,4cyclictest81rcu_preempt10:22:421
2181599344,4cyclictest81rcu_preempt10:08:171
2181599344,4cyclictest81rcu_preempt09:32:071
21815993426,6cyclictest0-21swapper/111:36:551
21814993420,4cyclictest3-21ksoftirqd/012:50:220
21814993419,5cyclictest3-21ksoftirqd/010:22:260
21814993415,8cyclictest3-21ksoftirqd/011:34:170
2181499341,29cyclictest14606-21ssh09:26:360
140532340,3sleep0111rcuc/008:25:250
2181599336,4cyclictest81rcu_preempt10:50:281
2181599334,4cyclictest81rcu_preempt09:51:011
2181599333,5cyclictest81rcu_preempt10:14:281
2181599333,16cyclictest23607-21diskstats11:50:191
21815993324,6cyclictest0-21swapper/112:00:161
21815993322,8cyclictest0-21swapper/109:20:151
2181599331,30cyclictest0-21swapper/110:36:151
2181599331,29cyclictest0-21swapper/110:16:161
2181599331,20cyclictest0-21swapper/111:42:531
21814993326,5cyclictest0-21swapper/008:08:150
21814993325,5cyclictest0-21swapper/007:47:030
2181499332,17cyclictest0-21swapper/010:00:010
21814993317,6cyclictest3-21ksoftirqd/007:58:570
2181599326,14cyclictest81rcu_preempt12:44:591
21815993223,5cyclictest13639-21ssh11:05:351
21815993223,5cyclictest0-21swapper/109:48:151
2181599321,4cyclictest81rcu_preempt09:10:571
2181599321,28cyclictest0-21swapper/111:55:351
2181599321,28cyclictest0-21swapper/111:55:351
2181599321,17cyclictest23319-21ssh11:15:391
2181599320,4cyclictest81rcu_preempt07:41:191
21814993218,4cyclictest3-21ksoftirqd/012:17:050
21814993217,5cyclictest3-21ksoftirqd/010:15:010
21814993217,5cyclictest3-21ksoftirqd/007:53:570
21814993216,5cyclictest3-21ksoftirqd/007:30:310
2181499321,29cyclictest0-21swapper/008:04:160
21814993211,6cyclictest3-21ksoftirqd/011:11:100
2181599317,5cyclictest81rcu_preempt09:05:001
2181599315,4cyclictest81rcu_preempt07:38:221
2181599312,4cyclictest81rcu_preempt12:06:561
2181599312,4cyclictest81rcu_preempt10:47:051
2181599311,4cyclictest81rcu_preempt07:51:321
2181599311,27cyclictest0-21swapper/110:26:161
2181599311,27cyclictest0-21swapper/108:34:561
2181499312,4cyclictest81rcu_preempt12:01:210
21814993116,5cyclictest3-21ksoftirqd/008:56:330
257512301,4sleep10-21swapper/108:56:321
21815993018,9cyclictest22-21ksoftirqd/111:45:201
2181599301,4cyclictest81rcu_preempt08:08:561
2181599301,27cyclictest0-21swapper/107:45:161
2181599301,16cyclictest1984-21hddtemp_smartct07:55:181
21814993013,6cyclictest3-21ksoftirqd/008:20:090
2181599295,4cyclictest81rcu_preempt08:43:271
2181599291,4cyclictest81rcu_preempt08:25:581
21815992913,6cyclictest22-21ksoftirqd/111:21:321
2181599291,14cyclictest17335-21ssh11:10:161
2181599291,11cyclictest17264-21grep08:35:151
21814992914,5cyclictest3-21ksoftirqd/009:00:310
21814992914,5cyclictest3-21ksoftirqd/008:45:080
2181599284,8cyclictest8043-21iostat_ios08:10:201
2181599283,4cyclictest81rcu_preempt08:03:081
2181599283,15cyclictest40550irq/92-i91507:31:171
2181499287,7cyclictest30497-21gdbus08:30:250
203872281,4sleep00-21swapper/008:44:210
238292271,5sleep10-21swapper/108:51:021
21815992718,5cyclictest20703-21cut08:45:121
2181499271,9cyclictest28171-21grep09:05:100
109292261,5sleep10-21swapper/108:18:581
2181599251,4cyclictest81rcu_preempt08:24:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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