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2026-04-09 - 15:20

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 Thu Apr 09, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
232959911521129,19cyclictest24032-21iostat_ios07:25:181
232949911301100,17cyclictest24185-21strings07:25:200
232959911281102,20cyclictest8210-21ssh12:40:011
230322664619,30sleep00-21swapper/007:22:500
230452564518,31sleep10-21swapper/107:22:591
1260221110,8sleep00-21swapper/009:23:330
192072900,9sleep02329499cyclictest08:35:250
73772880,6sleep02329499cyclictest10:25:130
23294998362,17cyclictest8227-21latency_hist12:40:010
64992610,8sleep02329499cyclictest12:04:560
175952600,8sleep02329499cyclictest10:35:220
289562560,2sleep028958-21grep09:40:170
294972520,24sleep03-21ksoftirqd/011:20:390
49102491,29sleep04962-21sed09:15:220
153312470,8sleep02329499cyclictest11:06:110
322652450,7sleep02329499cyclictest07:45:200
267052430,3sleep122-21ksoftirqd/109:37:591
218752402,6sleep122-21ksoftirqd/112:20:181
182722400,4sleep02329499cyclictest11:10:110
66752390,9sleep02329499cyclictest10:24:400
2329599397,29cyclictest29186-21cron11:55:001
2329499391,34cyclictest0-21swapper/011:46:350
27682381,33sleep12780-21rm10:54:021
2329599384,11cyclictest81rcu_preempt09:18:091
2329499374,5cyclictest0-21swapper/011:01:560
2329499371,23cyclictest14413-21cron08:25:000
2329599365,4cyclictest81rcu_preempt07:46:001
2329599364,4cyclictest81rcu_preempt07:58:271
23295993617,9cyclictest22-21ksoftirqd/109:20:121
23295993616,6cyclictest22-21ksoftirqd/109:10:591
23294993618,7cyclictest26736-21wget12:25:190
2329599355,4cyclictest81rcu_preempt10:12:331
2329599354,4cyclictest81rcu_preempt12:01:121
2329599354,4cyclictest81rcu_preempt11:35:381
2329599354,10cyclictest81rcu_preempt10:08:221
2329499355,17cyclictest0-21swapper/012:20:490
2329499353,29cyclictest0-21swapper/011:34:350
2329499352,29cyclictest0-21swapper/009:47:160
2329499352,17cyclictest27120-21iostat10:45:190
2329499351,6cyclictest2403-21irqbalance12:13:560
2329499351,6cyclictest2403-21irqbalance12:13:560
23294993513,5cyclictest3-21ksoftirqd/010:14:220
23294993511,7cyclictest8358-21aten_r4power_cu12:40:120
154152351,30sleep115520-21hddtemp_smartct11:40:191
268972341,29sleep127056-21tail08:55:301
2329599346,5cyclictest81rcu_preempt09:45:121
2329599345,5cyclictest81rcu_preempt12:30:271
2329599342,7cyclictest0-21swapper/111:46:551
23295993424,6cyclictest8888-21sh10:25:521
2329599342,28cyclictest0-21swapper/112:47:361
2329599342,28cyclictest0-21swapper/110:20:551
2329599341,29cyclictest27359-21ssh11:19:361
2329499347,16cyclictest0-21swapper/008:49:540
2329499342,29cyclictest0-21swapper/012:32:360
2329499341,5cyclictest2403-21irqbalance12:50:350
2329499341,4cyclictest81rcu_preempt10:56:350
2329499341,29cyclictest18426-21cron09:30:000
16722340,5sleep01665-21ssh12:00:010
82852331,4sleep10-21swapper/112:05:321
255102331,5sleep00-21swapper/010:44:010
2329599335,4cyclictest81rcu_preempt11:28:321
2329599335,25cyclictest1968-21lldpad09:41:071
2329599334,27cyclictest0-21swapper/111:55:351
2329599334,10cyclictest81rcu_preempt12:26:191
2329599333,17cyclictest0-21swapper/112:50:141
23295993325,5cyclictest16534-21cron10:35:001
2329599332,27cyclictest0-21swapper/111:08:151
2329599331,5cyclictest81rcu_preempt09:25:271
2329599331,28cyclictest11379-21cron12:14:561
2329599331,28cyclictest11379-21cron12:14:561
2329599331,12cyclictest0-21swapper/107:34:071
2329499338,6cyclictest12531-21hddtemp_smartct10:30:160
2329499334,4cyclictest81rcu_preempt12:08:520
2329499333,27cyclictest27637-21cron11:19:590
23294993325,5cyclictest28090-21cron09:40:000
2329499331,30cyclictest0-21swapper/010:04:370
2329499331,30cyclictest0-21swapper/007:35:360
23294993310,4cyclictest0-21swapper/011:25:180
78692320,4sleep023292-21cyclictest09:51:300
304702321,5sleep10-21swapper/107:40:241
2329599325,5cyclictest81rcu_preempt10:40:261
2329599325,4cyclictest81rcu_preempt10:55:151
2329599323,5cyclictest81rcu_preempt09:33:091
2329599323,4cyclictest81rcu_preempt12:15:411
2329599323,4cyclictest81rcu_preempt11:10:201
2329599323,4cyclictest81rcu_preempt10:46:171
2329599321,5cyclictest0-21swapper/108:52:361
2329599321,4cyclictest81rcu_preempt10:39:381
2329599321,29cyclictest0-21swapper/108:23:351
2329599321,14cyclictest0-21swapper/108:19:521
2329499321,5cyclictest0-21swapper/007:42:160
23294993215,14cyclictest3-21ksoftirqd/009:13:120
2329499321,28cyclictest0-21swapper/011:50:390
23294993212,5cyclictest11210-21irqstats09:55:200
23294993211,9cyclictest0-21swapper/010:15:120
2329599311,7cyclictest2403-21irqbalance08:45:161
2329599311,4cyclictest81rcu_preempt09:53:031
2329599311,28cyclictest0-21swapper/109:55:361
2329599311,26cyclictest30152-21ssh11:21:351
2329499319,4cyclictest0-21swapper/011:37:400
2329499312,5cyclictest17013-21hddtemp_smartct12:15:170
2329499311,4cyclictest81rcu_preempt08:04:460
23294993114,6cyclictest3-21ksoftirqd/012:45:380
23294993112,15cyclictest16418-21users11:40:310
2329499311,14cyclictest24995-21python08:50:270
2329499311,13cyclictest17278-21ntpq08:30:240
2329499311,12cyclictest209962memory10:05:220
122082311,26sleep112219-21ssh11:03:421
61882301,25sleep16288-21timerwakeupswit08:00:281
323132301,5sleep10-21swapper/110:17:001
311632301,5sleep00-21swapper/010:50:030
2329599304,4cyclictest81rcu_preempt10:01:131
2329599304,3cyclictest81rcu_preempt12:43:001
2329499309,7cyclictest26662-21memory07:30:210
2329499309,5cyclictest81rcu_preempt08:15:230
2329499308,5cyclictest8137-21timerandwakeup08:05:290
2329499301,9cyclictest0-21swapper/009:32:550
2329499301,4cyclictest81rcu_preempt07:55:590
23294993012,6cyclictest0-21swapper/009:07:180
23294993012,6cyclictest0-21swapper/009:07:170
23294993010,6cyclictest30497-21gdbus09:04:260
215342301,5sleep00-21swapper/008:40:490
160902301,5sleep00-21swapper/008:27:580
292472291,5sleep10-21swapper/107:36:191
24182291,5sleep00-21swapper/007:50:460
2329599295,18cyclictest5949-21iostat_ios11:30:181
2329599294,9cyclictest30893-21users09:05:311
2329599294,9cyclictest30893-21users09:05:301
2329599292,17cyclictest40550irq/92-i91508:25:111
2329599291,7cyclictest18616-21df_inode08:35:141
2329499293,13cyclictest0-21swapper/008:57:380
2329599284,4cyclictest81rcu_preempt08:32:331
2329599281,6cyclictest20226-21/usr/sbin/munin08:40:141
23294992811,13cyclictest9515-21iostat_ios08:10:180
106052281,5sleep10-21swapper/108:14:471
2329599274,17cyclictest2847-21file07:53:471
2329599272,4cyclictest81rcu_preempt08:05:031
23295992416,5cyclictest22-21ksoftirqd/109:01:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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