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2026-09-24 - 18:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Thu Sep 24, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
259074821310,3sleep13056-21PK-Backend11:35:131
250687221220,4sleep10-21swapper/107:35:131
251249121020,2sleep20-21swapper/207:50:182
25731612970,4sleep03056-21PK-Backend10:45:030
249504527446,18sleep30-21swapper/307:05:103
139099730,59rtkit-daemon0-21swapper/107:08:371
25696732690,4sleep33056-21PK-Backend10:35:123
249624226545,14sleep00-21swapper/007:06:490
249616126343,13sleep20-21swapper/207:05:472
25804942520,4sleep20-21swapper/211:05:142
24985722400,2sleep20-21swapper/207:15:012
25764902390,3sleep33056-21PK-Backend10:55:013
25995522300,11sleep342-21ksoftirqd/312:00:123
25405642270,3sleep10-21swapper/109:10:201
25960512260,11sleep234-21ksoftirqd/211:50:142
25860522260,3sleep13056-21PK-Backend11:20:161
25499132260,3sleep10-21swapper/109:40:001
25499132260,3sleep10-21swapper/109:39:591
25346342250,4sleep1251rcuc/108:55:131
249665699251,8cyclictest25136892expr07:55:122
25611542240,4chrt3056-21PK-Backend10:10:173
139099240,16rtkit-daemon13-21ksoftirqd/010:04:170
25833552230,7sleep2883-21dbus-daemon11:15:012
2496650992315,6cyclictest2595460-21latency_hist11:50:000
249665099231,20cyclictest2555090-21awk09:55:000
139099230,14rtkit-daemon0-21swapper/012:11:130
139099230,13rtkit-daemon0-21swapper/008:30:250
25461692220,4sleep32546170-21sleep09:30:003
249665899222,6cyclictest2499279-21apt-get07:15:043
2496658992220,1cyclictest3056-21PK-Backend09:46:423
2496658992219,2cyclictest3056-21PK-Backend10:58:133
2496658992214,6cyclictest2543685-21ntpq09:20:183
2496658992214,6cyclictest2498334-21munin-run07:15:003
249665899220,20cyclictest3056-21PK-Backend08:50:313
2496652992220,1cyclictest0-21swapper/111:52:111
2496652992220,1cyclictest0-21swapper/110:52:031
2496652992220,1cyclictest0-21swapper/107:22:551
2496652992217,3cyclictest2555346-21apt09:55:101
2496652992211,9cyclictest2547921-21unin-run09:35:001
2496650992214,6cyclictest436-20systemd-journal10:39:590
139099220,14rtkit-daemon0-21swapper/108:15:471
139099220,14rtkit-daemon0-21swapper/107:30:221
25364232210,5sleep00-21swapper/009:00:170
2496658992119,1cyclictest3056-21PK-Backend12:25:463
2496658992119,1cyclictest3056-21PK-Backend10:28:053
2496658992119,1cyclictest3056-21PK-Backend09:53:383
2496658992119,1cyclictest3056-21PK-Backend07:43:323
2496658992119,1cyclictest3056-21PK-Backend07:43:323
2496658992119,1cyclictest3056-21PK-Backend07:29:333
2496658992119,1cyclictest0-21swapper/312:07:413
2496658992119,1cyclictest0-21swapper/311:36:253
2496658992119,1cyclictest0-21swapper/311:05:293
249665899211,7cyclictest2586187-21python311:20:193
2496656992119,1cyclictest0-21swapper/208:02:242
2496656992114,5cyclictest2540941-21cron09:15:002
2496656992113,7cyclictest883-21dbus-daemon12:06:462
2496656992113,6cyclictest2584811-21cron11:17:002
2496656992113,6cyclictest2503545-21awk07:25:202
249665699210,20cyclictest0-21swapper/212:11:122
249665699210,20cyclictest0-21swapper/209:21:542
249665699210,20cyclictest0-21swapper/207:16:062
249665699210,1cyclictest0-21swapper/211:30:512
249665299212,16cyclictest2534030-21turbostat08:55:001
2496652992119,1cyclictest3056-21PK-Backend11:59:281
2496652992119,1cyclictest3056-21PK-Backend11:10:421
2496652992119,1cyclictest3056-21PK-Backend11:02:231
2496652992119,1cyclictest0-21swapper/112:19:431
2496652992119,1cyclictest0-21swapper/110:27:551
2496652992119,1cyclictest0-21swapper/109:47:341
2496652992119,1cyclictest0-21swapper/109:18:001
2496652992119,1cyclictest0-21swapper/108:48:531
2496652992119,1cyclictest0-21swapper/108:28:531
2496652992113,6cyclictest2609495-21sed12:30:011
2496652992113,6cyclictest2508660-21df07:40:141
2496652992113,6cyclictest2508660-21df07:40:141
249665299210,2cyclictest2528230-21python308:35:221
249665299210,2cyclictest2528230-21python308:35:221
249665299210,20cyclictest0-21swapper/112:13:141
249665299210,20cyclictest0-21swapper/110:36:141
249665299210,19cyclictest3056-21PK-Backend11:32:451
249665299210,19cyclictest3056-21PK-Backend07:12:141
2496650992119,1cyclictest0-21swapper/012:15:180
2496650992114,6cyclictest2563602-21sed10:15:230
249665099210,20cyclictest0-21swapper/011:24:150
249665099210,20cyclictest0-21swapper/011:09:060
249665099210,20cyclictest0-21swapper/008:22:320
249665099210,20cyclictest0-21swapper/008:01:570
249665099210,20cyclictest0-21swapper/007:29:320
139099210,15rtkit-daemon13-21ksoftirqd/010:07:410
139099210,15rtkit-daemon0-21swapper/012:07:280
139099210,14rtkit-daemon0-21swapper/109:23:261
139099210,14rtkit-daemon0-21swapper/107:15:101
139099210,14rtkit-daemon0-21swapper/007:35:420
139099210,13rtkit-daemon0-21swapper/011:40:420
2496658992018,1cyclictest3056-21PK-Backend08:37:203
2496658992018,1cyclictest3056-21PK-Backend08:37:203
2496658992018,1cyclictest0-21swapper/311:30:583
2496658992018,1cyclictest0-21swapper/311:27:203
2496658992018,1cyclictest0-21swapper/311:01:523
2496658992018,1cyclictest0-21swapper/307:24:063
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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