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2025-12-12 - 04:36

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 Fri Dec 12, 2025 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34352238161,24sleep00-21swapper/019:05:370
37232234162,24sleep30-21swapper/319:09:183
37612204166,25sleep10-21swapper/119:09:501
35802203166,24sleep20-21swapper/219:07:282
1300321430,5sleep2387299cyclictest23:09:462
38729910796,10cyclictest0-21swapper/219:42:482
3872996951,8cyclictest0-21swapper/219:24:512
3872995148,2cyclictest0-21swapper/222:22:262
251552490,1sleep011-21rcuc/021:10:020
83002450,1sleep30-21swapper/321:45:143
385999389,13cyclictest16798-21munin-run22:05:010
385999378,13cyclictest13324-21munin-run19:30:020
386799362,6cyclictest0-21swapper/123:05:251
386799331,6cyclictest0-21swapper/119:48:291
385999337,12cyclictest13966-21awk20:45:020
386799321,15cyclictest16860-21timerwakeupswit23:15:251
386799320,6cyclictest0-21swapper/120:55:171
385999329,10cyclictest674-21munin-run20:15:010
387299311,5cyclictest19415-21expr22:10:132
386799311,5cyclictest0-21swapper/121:59:091
386799311,23cyclictest0-21swapper/122:17:331
386799311,13cyclictest8855-21/usr/sbin/munin23:00:271
386799311,12cyclictest0-21swapper/100:10:211
386799301,9cyclictest0-21swapper/123:32:531
386799291,9cyclictest0-21swapper/122:45:411
386799291,9cyclictest0-21swapper/122:45:411
386799291,6cyclictest0-21swapper/122:20:211
386799291,18cyclictest3388-21grep00:00:171
386799291,12cyclictest0-21swapper/123:50:371
386799291,10cyclictest24956-21diskmemload23:21:091
386799291,10cyclictest20192-21df23:25:151
386799281,23cyclictest26152-21df22:25:141
386799281,14cyclictest4266-21ntp_states20:20:231
386799281,13cyclictest0-21swapper/122:42:291
272292280,4sleep230-21rcuc/221:15:012
387899271,15cyclictest0-21swapper/323:45:143
386799272,12cyclictest28065-21hddtemp_smartct21:15:181
3867992716,3cyclictest19241-21/usr/sbin/munin22:10:121
386799271,11cyclictest0-21swapper/100:06:531
387899268,7cyclictest24963-21munin-run21:10:023
386799261,9cyclictest0-21swapper/121:21:391
386799261,17cyclictest7745-21sshd21:42:011
386799261,17cyclictest7745-21sshd21:42:011
386799261,16cyclictest5306-21unixbench-2d21:35:251
386799260,18cyclictest0-21swapper/121:48:531
386799260,11cyclictest0-21swapper/100:27:171
386799260,10cyclictest0-21swapper/100:16:531
387899251,16cyclictest14634-21snmpd20:50:263
386799251,9cyclictest0-21swapper/123:35:491
386799251,16cyclictest0-21swapper/120:27:011
386799251,11cyclictest0-21swapper/122:04:371
386799251,10cyclictest0-21swapper/119:25:171
386799250,12cyclictest0-21swapper/119:20:211
386799250,11cyclictest0-21swapper/122:51:251
386799250,10cyclictest0-21swapper/123:56:371
386799250,10cyclictest0-21swapper/123:56:371
3859992519,3cyclictest5653-21expr20:25:170
385999251,13cyclictest361-21awk23:55:020
3878992419,2cyclictest17440-21idleruntime-cro23:20:013
387899240,5cyclictest12323-21kworker/u8:022:11:273
387299248,6cyclictest0-21swapper/222:50:012
387299248,6cyclictest0-21swapper/222:50:012
387299241,9cyclictest0-21swapper/223:53:082
386799241,16cyclictest24956-21diskmemload00:38:011
386799241,16cyclictest0-21swapper/119:13:291
386799240,12cyclictest0-21swapper/122:39:331
387899237,2cyclictest10271-21if_enp2s000:15:213
387899231,6cyclictest0-21swapper/321:55:203
387899231,18cyclictest86550irq/126-enp1s0-21:16:063
387899230,5cyclictest0-21swapper/300:09:023
387299236,8cyclictest0-21swapper/223:25:232
387299235,6cyclictest32-21ksoftirqd/222:30:312
386799231,8cyclictest0-21swapper/122:09:091
386799231,14cyclictest0-21swapper/120:09:251
386799231,11cyclictest0-21swapper/120:36:451
386799231,11cyclictest0-21swapper/120:36:451
386799231,10cyclictest0-21swapper/100:32:131
385999231,5cyclictest11775-21kworker/u8:221:10:590
385999231,11cyclictest4894-21perf00:05:020
387899223,9cyclictest24956-21diskmemload23:22:433
387899222,11cyclictest779-21ntpd22:50:173
387899221,11cyclictest10129-21swap23:00:283
387299229,3cyclictest2031-21awk22:45:012
387299226,13cyclictest876-21systemd-logind19:40:012
387299222,2cyclictest88050irq/133-enp2s0-19:15:212
387299221,8cyclictest29805-21latency20:05:192
387299221,10cyclictest0-21swapper/220:50:232
387299221,10cyclictest0-21swapper/220:40:172
386799225,3cyclictest0-21swapper/120:18:291
386799221,9cyclictest0-21swapper/123:40:451
3867992217,2cyclictest31430-21cstates20:10:131
3867992215,2cyclictest0-21swapper/121:10:471
386799221,16cyclictest0-21swapper/122:33:391
386799221,14cyclictest0-21swapper/121:52:291
386799221,10cyclictest0-21swapper/122:55:071
386799220,12cyclictest0-21swapper/120:54:291
3859992215,4cyclictest15889-21munin-run00:30:020
147982220,4sleep232-21ksoftirqd/222:00:012
387899214,9cyclictest15167-21sendmail_mailst00:25:283
387899214,4cyclictest9406-21sshd20:33:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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