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2026-01-07 - 09:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 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 rack5slot3s.osadl.org (updated Wed Jan 07, 2026 00:44:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151952230166,52sleep30-21swapper/319:07:343
150742203167,24sleep10-21swapper/119:06:001
151692202165,25sleep20-21swapper/219:07:132
150982201165,24sleep00-21swapper/019:06:190
254921580,5sleep01545999cyclictest21:05:140
2136321540,4sleep21547299cyclictest00:15:132
2933021420,4sleep31547999cyclictest00:31:283
164572520,4sleep21547299cyclictest19:10:182
28062500,2sleep3401ktimersoftd/322:20:013
214102500,4sleep01545999cyclictest21:45:390
228272490,3sleep232-21ksoftirqd/221:50:182
4762460,4sleep230-21rcuc/223:25:262
15472994541,3cyclictest0-21swapper/200:05:072
27872400,1sleep10-21swapper/119:50:231
15459993910,13cyclictest20182-21munin-run23:00:010
1547299362,26cyclictest23315-21kworker/2:023:21:062
189872350,4sleep11546699cyclictest22:55:181
1545999338,12cyclictest28995-21awk23:20:000
1546699321,17cyclictest0-21swapper/119:45:181
1545999326,12cyclictest26801-21perf23:15:010
1547299317,3cyclictest19101-21kworker/2:019:35:032
1547299311,20cyclictest19101-21kworker/2:019:30:172
1545999311,14cyclictest3556-21munin-run19:55:010
15459993110,10cyclictest0-21swapper/020:20:000
53602290,4sleep21547299cyclictest22:25:142
1547299299,11cyclictest23315-21kworker/2:021:25:432
1547299292,11cyclictest23315-21kworker/2:000:35:112
15472992917,2cyclictest23315-21kworker/2:000:21:452
15459992910,16cyclictest24942-21idleruntime-cro19:30:020
15472992818,2cyclictest23315-21kworker/2:021:18:532
1547999271,10cyclictest0-21swapper/320:42:383
1547299279,2cyclictest3766-21kworker/2:220:24:502
1547299278,2cyclictest19101-21kworker/2:019:24:242
1547299277,3cyclictest23315-21kworker/2:021:33:192
15472992717,2cyclictest23315-21kworker/2:022:07:062
15472992711,3cyclictest16071-21hddtemp_smartct21:35:152
1547299271,12cyclictest23315-21kworker/2:022:53:142
1545999274,11cyclictest1003-21awk23:30:000
1547299267,2cyclictest23315-21kworker/2:020:46:402
1547299262,13cyclictest23315-21kworker/2:023:41:542
1547299262,12cyclictest23315-21kworker/2:023:32:562
15472992616,2cyclictest23315-21kworker/2:021:21:412
15472992613,2cyclictest3766-21kworker/2:220:26:262
1547299261,18cyclictest23315-21kworker/2:022:13:342
15472992611,13cyclictest23315-21kworker/2:000:10:212
1546699261,23cyclictest0-21swapper/100:00:121
1545999261,4cyclictest0-21swapper/023:21:390
1545999261,12cyclictest2595-21munin-run22:20:010
1547999252,11cyclictest9415-21/usr/sbin/munin22:35:243
1547299252,10cyclictest23315-21kworker/2:023:39:082
1547299252,10cyclictest23315-21kworker/2:023:10:462
1547299251,14cyclictest23315-21kworker/2:022:55:522
15472992510,3cyclictest3766-21kworker/2:220:20:022
1546699252,12cyclictest14201-21munin-run00:00:011
1547999241,15cyclictest0-21swapper/320:02:083
1547999241,11cyclictest0-21swapper/319:17:043
1547999241,10cyclictest0-21swapper/319:47:083
1547299249,3cyclictest3766-21kworker/2:219:55:552
1547299249,3cyclictest19101-21kworker/2:019:46:352
1547299249,2cyclictest23315-21kworker/2:020:54:362
1547299248,9cyclictest23315-21kworker/2:000:00:392
1547299248,2cyclictest23315-21kworker/2:000:28:072
1547299247,4cyclictest1049-21ntp_states21:00:242
1547299242,9cyclictest23315-21kworker/2:021:05:072
1547299242,10cyclictest23315-21kworker/2:023:16:162
15472992411,3cyclictest19101-21kworker/2:019:43:392
15472992411,2cyclictest3766-21kworker/2:220:09:482
1547299241,11cyclictest23315-21kworker/2:021:42:512
15472992410,3cyclictest19101-21kworker/2:019:16:442
1546699242,4cyclictest18640-21munin-run00:10:011
1546699241,13cyclictest8187-21diskstats23:45:141
1545999241,6cyclictest0-21swapper/023:57:010
15479992310,3cyclictest0-21swapper/320:48:183
1547299239,3cyclictest23315-21kworker/2:023:07:322
1547299239,3cyclictest23315-21kworker/2:022:01:322
1547299239,3cyclictest19101-21kworker/2:019:27:232
1547299238,3cyclictest23315-21kworker/2:022:47:042
1547299236,7cyclictest0-21swapper/223:03:482
1547299236,2cyclictest23315-21kworker/2:022:40:402
15472992310,3cyclictest3766-21kworker/2:220:13:402
15472992310,3cyclictest3766-21kworker/2:220:03:392
15472992310,3cyclictest23315-21kworker/2:023:57:392
15472992310,2cyclictest23315-21kworker/2:022:33:322
1547299230,16cyclictest23315-21kworker/2:023:46:172
1547299230,10cyclictest23315-21kworker/2:023:50:112
1546699237,4cyclictest24696-21pmu-power20:40:221
1546699233,15cyclictest2959-40dnf23:31:561
1546699232,11cyclictest577-21systemd-journal00:40:011
15466992310,11cyclictest21698-21kworker/u8:121:53:101
15459992310,3cyclictest6628-21kworker/0:122:30:050
1547999221,10cyclictest0-21swapper/319:20:593
1547299228,3cyclictest23315-21kworker/2:022:36:462
1547299228,12cyclictest23315-21kworker/2:021:59:252
1547299227,3cyclictest23315-21kworker/2:020:41:082
1547299226,3cyclictest3766-21kworker/2:220:37:562
1547299221,11cyclictest23315-21kworker/2:020:55:122
15472992210,3cyclictest23315-21kworker/2:021:13:392
15472992210,2cyclictest23315-21kworker/2:000:33:472
15466992213,2cyclictest4188-21diskmemload21:24:441
1546699221,18cyclictest27835-21ls00:30:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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