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2025-12-18 - 08:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 100 highest latencies:
System rack0slot4s.osadl.org (updated Thu Dec 18, 2025 00:46:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39591032398376,13sleep110-21swapper/1119:06:283
39593212394374,18sleep00-21swapper/019:09:140
39591442365319,14sleep50-21swapper/519:06:5411
39592282364325,31sleep40-21swapper/419:07:5710
39593692363322,13sleep80-21swapper/819:09:5414
39591902352334,11sleep60-21swapper/619:07:2712
39592222351326,15sleep150-21swapper/1519:07:527
39593682350327,15sleep70-21swapper/719:09:5313
39593312348327,14sleep100-21swapper/1019:09:242
39591722348327,14sleep90-21swapper/919:07:1515
39590362348326,15sleep140-21swapper/1419:05:436
39592622347326,14sleep10-21swapper/119:08:271
39592132347327,13sleep120-21swapper/1219:07:494
39591052346323,15sleep130-21swapper/1319:06:305
39590932346321,17sleep30-21swapper/319:06:209
39591402340319,14sleep20-21swapper/219:06:518
3959807994139,1cyclictest0-21swapper/923:09:1915
395978699382,11cyclictest0-21swapper/121:17:361
395978699382,11cyclictest0-21swapper/120:11:411
395978699372,11cyclictest0-21swapper/123:07:251
395978699371,11cyclictest0-21swapper/122:34:281
395978699371,11cyclictest0-21swapper/122:01:311
395978699371,11cyclictest0-21swapper/120:55:371
395978699371,11cyclictest0-21swapper/120:22:401
395978699360,11cyclictest0-21swapper/121:39:331
3959816993533,1cyclictest0-21swapper/1220:15:224
3959816993532,1cyclictest0-21swapper/1223:30:134
395978699350,10cyclictest0-21swapper/100:02:201
3959816993426,6cyclictest0-21swapper/1221:35:164
3959791993430,3cyclictest4114173-21kworker/u32:6+flush-259:022:25:359
3959791993426,6cyclictest4039278-21kworker/u32:4+flush-259:021:04:319
3959807993332,1cyclictest0-21swapper/919:28:1815
3959807993331,0cyclictest0-21swapper/921:47:5515
395978699339,11cyclictest0-21swapper/123:40:221
3959807993232,0cyclictest0-21swapper/921:55:1815
3959795993232,0cyclictest0-21swapper/523:09:2011
3959795993229,1cyclictest211rcu_preempt19:25:1311
395978699328,11cyclictest0-21swapper/122:45:271
395978699328,11cyclictest0-21swapper/121:50:321
395982599310,30cyclictest0-21swapper/1500:10:067
3959823993116,4cyclictest211rcu_preempt22:52:156
395981899310,30cyclictest0-21swapper/1323:43:215
3959813993129,1cyclictest4142136-21kworker/11:1+events23:59:533
3959813993129,1cyclictest4142136-21kworker/11:1+events23:54:013
3959813993129,1cyclictest4142136-21kworker/11:1+events23:39:353
3959813993129,1cyclictest4142136-21kworker/11:1+events23:16:353
3959813993129,1cyclictest4142136-21kworker/11:1+events22:55:563
3959813993129,1cyclictest4142136-21kworker/11:1+events00:33:053
3959813993129,1cyclictest4142136-21kworker/11:1+events00:23:213
3959813993129,1cyclictest4142136-21kworker/11:1+events00:19:293
3959813993129,1cyclictest4142136-21kworker/11:1+events00:12:593
3959813993129,1cyclictest4142136-21kworker/11:1+events00:06:353
3959813993129,1cyclictest3993944-21kworker/11:2+events22:41:473
3959813993129,1cyclictest3993944-21kworker/11:2+events22:39:153
3959813993129,1cyclictest3993944-21kworker/11:2+events22:32:333
3959813993129,1cyclictest3993944-21kworker/11:2+events22:26:033
3959813993129,1cyclictest3993944-21kworker/11:2+events22:22:323
3959813993129,1cyclictest3993944-21kworker/11:2+events22:12:223
3959813993129,1cyclictest3993944-21kworker/11:2+events22:09:233
3959813993129,1cyclictest3993944-21kworker/11:2+events21:11:093
3959813993129,1cyclictest3993944-21kworker/11:2+events21:01:173
3959813993129,1cyclictest3993944-21kworker/11:2+events20:42:493
3959813993129,1cyclictest3993944-21kworker/11:2+events20:29:453
3959813993129,1cyclictest3964786-21kworker/11:0+events19:36:273
395980999310,30cyclictest0-21swapper/1023:03:532
3959807993131,0cyclictest0-21swapper/923:49:0315
3959807993131,0cyclictest0-21swapper/920:01:5515
395980799310,31cyclictest4042273-21kworker/9:0-i915-unordered21:26:5515
395980799310,31cyclictest4042273-21kworker/9:0-i915-unordered21:26:5515
395980799310,30cyclictest0-21swapper/923:20:1715
395980499310,30cyclictest0-21swapper/821:00:1614
395980499310,1cyclictest0-21swapper/800:29:1314
3959802993130,1cyclictest1931-21snmpd22:37:2213
3959795993130,1cyclictest4121296-21kworker/5:1-events00:36:5511
3959795993130,1cyclictest4121296-21kworker/5:1-events00:36:5511
3959795993130,1cyclictest1931-21snmpd20:57:1311
395979299310,30cyclictest0-21swapper/421:20:0510
395979299310,30cyclictest0-21swapper/420:05:1610
395979299310,30cyclictest0-21swapper/400:07:3610
3959791993128,1cyclictest27464-21kworker/u32:3+flush-259:000:29:399
3959791993126,3cyclictest0-21swapper/322:20:179
395979099310,30cyclictest0-21swapper/223:42:428
395978499310,30cyclictest0-21swapper/021:05:220
395978499310,30cyclictest0-21swapper/000:23:530
3959825993029,1cyclictest1931-21snmpd21:15:207
3959825993029,1cyclictest0-21swapper/1519:26:197
3959825993028,2cyclictest4087734-21cat21:40:147
3959825993028,1cyclictest1931-21snmpd00:01:547
3959823993029,1cyclictest1931-21snmpd20:27:216
395982399300,30cyclictest0-21swapper/1423:57:066
395982399300,1cyclictest0-21swapper/1421:56:126
3959818993029,1cyclictest0-21swapper/1322:03:245
395981899300,30cyclictest0-21swapper/1321:46:295
395981899300,30cyclictest0-21swapper/1320:48:555
395981899300,1cyclictest0-21swapper/1321:10:405
3959813993030,0cyclictest4142136-21kworker/11:1+events23:08:473
3959813993029,1cyclictest4142136-21kworker/11:1+events23:41:293
3959813993029,1cyclictest4142136-21kworker/11:1+events23:22:413
3959813993029,1cyclictest4142136-21kworker/11:1+events00:25:333
3959813993029,1cyclictest4004823-21kworker/11:1+events20:00:363
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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