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2026-06-13 - 10:41

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 50 highest latencies:
System rack7slot7s.osadl.org (updated Sat Jun 13, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2950029480,9sleep00-21swapper/019:06:210
2953429076,10sleep20-21swapper/219:06:472
2965528667,15sleep10-21swapper/119:08:231
2956028269,9sleep30-21swapper/319:07:093
306812640,1sleep030682-21gzip00:08:220
2992399331,31cyclictest0-21swapper/022:10:110
29926992928,1cyclictest0-21swapper/121:52:461
29926992928,1cyclictest0-21swapper/121:52:451
2992399292,25cyclictest31929-21turbostat.cron20:20:000
2992399291,27cyclictest1228-21fgrep23:50:210
29926992825,2cyclictest38150irq/131-snd_hda22:15:101
2992399274,22cyclictest23292-21diskmemload23:38:070
2992399272,24cyclictest23292-21diskmemload00:16:080
2992399270,26cyclictest0-21swapper/023:45:120
2992399264,21cyclictest23292-21diskmemload22:50:090
2992399263,18cyclictest23292-21diskmemload21:12:340
2992399260,1cyclictest23292-21diskmemload23:55:130
2992399260,0cyclictest0-21swapper/021:20:260
2993099250,24cyclictest0-21swapper/221:44:082
2992399253,21cyclictest23292-21diskmemload00:39:440
2992399250,1cyclictest0-21swapper/023:05:270
2992399250,13cyclictest0-21swapper/022:58:150
2992399250,0cyclictest0-21swapper/022:29:040
2992399250,0cyclictest0-21swapper/021:17:230
77742240,0sleep00-21swapper/000:13:590
2992399242,2cyclictest23292-21diskmemload23:31:370
2992399242,21cyclictest23292-21diskmemload22:23:370
2992399241,20cyclictest21417-21tr21:05:150
2993099230,23cyclictest0-21swapper/200:06:272
2993099230,22cyclictest0-21swapper/220:55:262
2992699230,22cyclictest0-21swapper/123:50:121
2992399233,19cyclictest0-21swapper/022:46:420
2992399232,1cyclictest23292-21diskmemload23:41:410
2992399232,19cyclictest23292-21diskmemload23:14:170
2992399232,16cyclictest23292-21diskmemload23:17:550
2992399231,1cyclictest27896-21apt-get22:30:100
2992399230,1cyclictest0-21swapper/000:30:250
203402230,0chrt0-21swapper/123:42:431
2993099220,21cyclictest0-21swapper/221:15:312
2992399223,18cyclictest23292-21diskmemload22:44:150
2992399222,1cyclictest23292-21diskmemload22:18:370
2992399221,2cyclictest12184-21munin-run19:40:000
2992399221,20cyclictest24299-21turbostat00:05:000
2993099210,20cyclictest0-21swapper/222:31:092
2992699210,1cyclictest0-21swapper/123:06:211
2992399212,18cyclictest0-21swapper/021:45:140
2992399210,20cyclictest23292-21diskmemload21:30:450
2992399210,1cyclictest0-21swapper/021:36:340
2993399200,20cyclictest0-21swapper/321:13:043
2993099201,19cyclictest0-21swapper/200:34:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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