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2026-08-18 - 15:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 rack7slot7s.osadl.org (updated Tue Aug 18, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
814929278,9sleep00-21swapper/007:08:420
810929178,9sleep20-21swapper/207:08:122
820928265,13sleep10-21swapper/107:09:271
806028269,9sleep30-21swapper/307:07:333
7762500,0sleep00-21swapper/009:29:060
834099313,27cyclictest922-21diskmemload09:30:141
8343992726,1cyclictest0-21swapper/211:17:322
8343992726,1cyclictest0-21swapper/209:53:562
8343992726,1cyclictest0-21swapper/209:53:562
834099261,1cyclictest28905-21egrep10:05:151
834099251,1cyclictest922-21diskmemload10:35:151
834399240,2cyclictest0-21swapper/208:05:142
834099247,10cyclictest0-21swapper/109:55:141
834099242,1cyclictest922-21diskmemload11:51:511
834099240,1cyclictest0-21swapper/112:30:141
834099240,1cyclictest0-21swapper/110:30:141
833899246,1cyclictest922-21diskmemload11:27:350
834099232,1cyclictest8723-21sed11:30:001
834099232,19cyclictest0-21swapper/108:30:001
834099232,17cyclictest0-21swapper/110:40:181
8340992316,7cyclictest0-21swapper/111:55:141
834099230,4cyclictest0-21swapper/111:44:231
834099230,2cyclictest0-21swapper/112:08:261
8348992220,1cyclictest922-21diskmemload11:46:213
834099228,13cyclictest26437-21ssh09:44:231
834099222,1cyclictest922-21diskmemload10:24:451
8340992220,1cyclictest0-21swapper/108:30:221
834099221,3cyclictest922-21diskmemload12:02:391
834099214,1cyclictest922-21diskmemload09:27:001
834099212,5cyclictest922-21diskmemload11:14:431
834099212,4cyclictest2325-21gltestperf09:10:171
834099211,2cyclictest23877-21cpu11:00:151
834099210,3cyclictest0-21swapper/110:04:321
834099210,2cyclictest0-21swapper/108:10:121
834099210,1cyclictest0-21swapper/111:05:131
834099210,1cyclictest0-21swapper/110:50:391
833899210,20cyclictest0-21swapper/011:45:130
834899200,19cyclictest0-21swapper/312:13:303
834399200,17cyclictest0-21swapper/209:21:422
834099206,6cyclictest27421-21ssh12:38:351
834099205,7cyclictest20762-21ssh11:17:161
834099202,17cyclictest922-21diskmemload09:40:001
8340992017,3cyclictest0-21swapper/107:14:221
834099201,3cyclictest19137-21hwlatdetect09:20:181
834099200,4cyclictest922-21diskmemload11:20:031
834099198,8cyclictest3463-21sh10:28:451
834099198,6cyclictest13131-21taskset09:16:271
834099193,15cyclictest922-21diskmemload09:52:251
834099193,15cyclictest922-21diskmemload09:52:251
834099192,2cyclictest29925-21ssh09:45:341
834099192,2cyclictest11694-21sh10:14:241
834099190,2cyclictest0-21swapper/112:25:261
834099190,2cyclictest0-21swapper/110:49:501
834099190,1cyclictest0-21swapper/110:59:241
834099187,6cyclictest16907-21taskset08:35:081
834099182,15cyclictest10631-21grep11:30:211
834099181,1cyclictest7159-21sh11:47:411
834399170,16cyclictest6697-21ssh09:12:582
834099179,7cyclictest21520-21head07:35:171
834099172,1cyclictest22573-21ssh12:15:511
834099171,1cyclictest922-21diskmemload11:38:451
834099170,1cyclictest0-21swapper/108:05:221
834099170,16cyclictest1993-21ssh12:23:231
833899175,6cyclictest15507-21apt-get07:25:000
833899174,12cyclictest13965-21ssh10:35:150
8338991715,2cyclictest13-21ksoftirqd/009:14:340
834899163,8cyclictest5796-21needreboot12:25:193
834899162,14cyclictest0-21swapper/309:40:403
834899160,15cyclictest0-21swapper/310:55:143
8343991615,1cyclictest0-21swapper/211:07:512
834099168,7cyclictest12406-21cat07:15:251
834099162,1cyclictest0-21swapper/108:50:251
834099161,5cyclictest225-21systemd-journal08:00:001
834099161,5cyclictest225-21systemd-journal08:00:001
834099161,1cyclictest12905-21apache_accesses10:15:101
8338991615,1cyclictest0-21swapper/011:40:120
834899150,14cyclictest6922-21kworker/u8:012:30:103
834399155,6cyclictest225-21systemd-journal08:30:002
834399153,5cyclictest55550irq/126-enp2s0-12:15:222
834099158,6cyclictest7618-21tr08:15:141
834099158,6cyclictest22453-21expr08:45:181
834099158,6cyclictest19550-21cpuspeed_turbos08:40:151
834099158,6cyclictest10577-21grep08:20:191
834099157,7cyclictest26750-21expr08:55:161
834099156,8cyclictest30178-21grep09:00:221
834099153,12cyclictest0-21swapper/107:50:271
834099150,2cyclictest922-21diskmemload12:10:101
833899154,3cyclictest225-21systemd-journal11:09:210
8338991510,3cyclictest11807-21rm09:35:170
223192150,0chrt0-21swapper/010:40:020
834899143,2cyclictest141rcu_preempt09:35:563
8348991410,3cyclictest1606-21turbostat.cron11:45:013
8348991410,2cyclictest26188-21cron08:55:003
8348991410,1cyclictest0-21swapper/312:07:163
834899140,1cyclictest0-21swapper/308:25:153
8343991410,3cyclictest17729-21sh12:32:332
834399140,13cyclictest0-21swapper/208:50:152
834099147,6cyclictest32314-21cat09:05:201
834099147,6cyclictest2372-21sleep08:05:001
834099147,6cyclictest15571-21cat07:25:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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