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2026-08-19 - 18:35

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 376 highest latencies:
System rack9slot4s (updated Wed Aug 19, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
182889912441214,26cyclictest22713-21dpkg07:35:001
180502705658,32sleep00-21swapper/007:23:050
181642444329,46sleep10-21swapper/107:24:161
1828799257193,41cyclictest22688-21idleruntime-cro07:35:010
322482840,3sleep1211ktimersoftd/109:25:131
123432840,3sleep10-21swapper/111:24:001
247092460,7sleep10-21swapper/111:55:251
18287994022,6cyclictest3-21ksoftirqd/008:18:240
165472400,8sleep01828799cyclictest10:09:570
18287993922,6cyclictest3-21ksoftirqd/007:39:030
18287993922,5cyclictest3-21ksoftirqd/012:02:040
18287993823,5cyclictest3-21ksoftirqd/011:01:530
18287993823,5cyclictest3-21ksoftirqd/010:53:200
18287993722,5cyclictest3-21ksoftirqd/010:22:420
1828799371,19cyclictest0-21swapper/011:29:360
1828799371,13cyclictest0-21swapper/008:10:120
18287993621,5cyclictest3-21ksoftirqd/008:34:090
18287993620,5cyclictest3-21ksoftirqd/007:44:440
1828799361,22cyclictest20945-21tr11:45:220
149622361,5sleep12695-21snmpd08:39:291
317582351,30sleep131894-21fw_packets12:15:181
245472351,30sleep124679-21fschecks_time10:30:161
1828899355,5cyclictest81rcu_preempt10:35:171
18287993520,5cyclictest3-21ksoftirqd/008:29:390
18287993518,6cyclictest3-21ksoftirqd/011:06:250
52502341,29sleep15357-21df11:05:131
18287993419,5cyclictest3-21ksoftirqd/009:36:320
18287993419,5cyclictest3-21ksoftirqd/009:14:130
18287993419,5cyclictest3-21ksoftirqd/008:54:240
18287993419,5cyclictest3-21ksoftirqd/008:08:020
18287993419,5cyclictest3-21ksoftirqd/007:52:050
18287993419,4cyclictest3-21ksoftirqd/011:10:470
18287993418,5cyclictest3-21ksoftirqd/012:41:540
18287993418,5cyclictest3-21ksoftirqd/012:06:400
18287993418,5cyclictest3-21ksoftirqd/010:04:010
18287993417,6cyclictest3-21ksoftirqd/008:58:570
18287993411,7cyclictest3-21ksoftirqd/010:35:170
1828899335,4cyclictest81rcu_preempt11:50:221
1828799335,13cyclictest11565-21gdbus11:41:150
18287993319,4cyclictest3-21ksoftirqd/011:56:530
18287993318,5cyclictest3-21ksoftirqd/008:45:070
18287993318,5cyclictest3-21ksoftirqd/007:56:010
18287993317,5cyclictest3-21ksoftirqd/011:54:350
18287993317,5cyclictest3-21ksoftirqd/009:27:300
18287993317,4cyclictest3-21ksoftirqd/012:30:270
18287993317,4cyclictest3-21ksoftirqd/012:30:270
1828799331,19cyclictest13694-21runrttasks12:52:020
85942321,6sleep10-21swapper/112:40:141
33732321,5sleep12291-21irqbalance08:06:181
18288993221,5cyclictest3034-21plymouth11:00:001
1828799326,15cyclictest40250irq/92-i91512:45:120
18287993218,4cyclictest3-21ksoftirqd/009:22:390
18287993217,5cyclictest3-21ksoftirqd/009:03:410
18287993217,4cyclictest3-21ksoftirqd/008:37:110
18287993216,6cyclictest3-21ksoftirqd/010:12:030
18287993216,6cyclictest3-21ksoftirqd/008:22:530
1828899315,4cyclictest81rcu_preempt09:14:391
1828899313,12cyclictest3286-21runrttasks07:48:431
1828899311,17cyclictest17075-21/usr/sbin/munin08:45:121
18287993117,4cyclictest3-21ksoftirqd/007:26:240
18287993117,4cyclictest3-21ksoftirqd/007:26:230
18287993116,5cyclictest3-21ksoftirqd/010:42:160
18287993116,5cyclictest3-21ksoftirqd/009:30:020
18287993115,6cyclictest3-21ksoftirqd/010:49:170
18287993112,6cyclictest11806-21/usr/sbin/munin11:20:290
18287993110,6cyclictest3-21ksoftirqd/009:59:430
25872301,25sleep02601-21idleruntime-cro12:25:000
1828899305,4cyclictest81rcu_preempt11:41:341
1828899305,4cyclictest81rcu_preempt09:23:031
1828899305,4cyclictest81rcu_preempt09:09:521
1828899304,19cyclictest12866-21iostat_ios12:50:201
18288993011,6cyclictest3286-21runrttasks08:10:121
1828899301,15cyclictest11404-21/usr/sbin/munin12:45:281
1828799306,8cyclictest3-21ksoftirqd/009:40:350
18287993016,5cyclictest3-21ksoftirqd/010:31:440
18287993016,4cyclictest3-21ksoftirqd/012:19:100
18287993015,5cyclictest3-21ksoftirqd/010:26:530
18287993014,5cyclictest3-21ksoftirqd/007:46:140
73082291,5sleep00-21swapper/009:45:080
295222291,5sleep10-21swapper/110:42:521
27522291,5sleep10-21swapper/112:25:071
243902291,5sleep10-21swapper/107:37:551
1828899295,4cyclictest81rcu_preempt10:54:241
1828899293,4cyclictest81rcu_preempt11:45:521
1828899292,23cyclictest7611-21diskstats09:45:161
18288992918,7cyclictest19088-21cat07:25:211
18288992918,7cyclictest19088-21cat07:25:201
1828899291,4cyclictest81rcu_preempt12:04:101
1828899291,3cyclictest0-21swapper/110:05:221
1828899290,4cyclictest81rcu_preempt09:40:361
18287992918,8cyclictest0-21swapper/008:42:040
18287992915,4cyclictest3-21ksoftirqd/009:53:200
1828799291,26cyclictest0-21swapper/012:11:320
163492291,5sleep10-21swapper/111:35:061
159482291,5sleep00-21swapper/011:32:290
141052291,5sleep10-21swapper/111:27:511
13182291,5sleep00-21swapper/008:00:390
105132291,5sleep00-21swapper/011:19:440
51602281,5sleep10-21swapper/109:39:001
48112281,5sleep10-21swapper/111:04:011
43692281,5sleep00-21swapper/012:28:100
289972281,5sleep10-21swapper/112:06:121
1828899286,4cyclictest81rcu_preempt10:29:171
1828899285,4cyclictest81rcu_preempt10:20:061
1828899281,4cyclictest81rcu_preempt09:32:521
18288992814,8cyclictest15801-21irqstats08:40:201
1828899281,22cyclictest7392-21awk12:35:231
1828799289,4cyclictest7284-21ls12:35:220
1828799281,6cyclictest17605-21grep11:35:310
1828799281,13cyclictest25200-21iostat_ios09:05:210
16852281,5sleep10-21swapper/108:04:251
155552281,3sleep10-21swapper/111:30:281
123632281,8sleep10-21swapper/109:55:421
111672281,5sleep10-21swapper/108:29:031
102172281,5sleep10-21swapper/111:16:411
89692271,5sleep10-21swapper/108:20:431
299962271,5sleep10-21swapper/107:52:301
1828899278,5cyclictest40250irq/92-i91510:00:211
1828899276,8cyclictest20008-21switchtime08:50:281
1828899274,17cyclictest21129-21diskstats08:55:161
1828899273,8cyclictest22727-21/usr/sbin/munin09:00:311
1828899273,4cyclictest81rcu_preempt09:18:491
1828899273,15cyclictest0-21swapper/110:45:421
1828899272,4cyclictest81rcu_preempt08:30:401
18288992721,4cyclictest22-21ksoftirqd/110:14:001
18288992718,5cyclictest2291-21irqbalance08:15:381
1828899271,23cyclictest0-21swapper/109:50:181
1828899271,11cyclictest5315-21irqstats12:30:221
1828899271,11cyclictest5315-21irqstats12:30:211
1828799276,17cyclictest2225-21dbus-daemon10:17:230
308862261,4sleep10-21swapper/112:11:201
1828899267,4cyclictest81rcu_preempt10:16:521
1828899261,21cyclictest842-21/usr/sbin/munin12:20:221
18288992610,5cyclictest40250irq/92-i91507:55:171
18288992610,5cyclictest40250irq/92-i91507:40:131
1828799261,5cyclictest0-21swapper/010:59:200
1828799261,13cyclictest28442-21/usr/sbin/munin09:15:120
1828899248,5cyclictest40250irq/92-i91511:10:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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