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2026-08-29 - 03:36

OSADL QA Farm on Real-time of Mainline Linux

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

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 rackeslot5s.osadl.org (updated Sat Aug 29, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
723599280,27cyclictest1308-21diskmemload22:55:490
7237992719,4cyclictest2697-21sh00:03:412
723599270,26cyclictest1308-21diskmemload22:18:510
7237992623,3cyclictest0-21swapper/200:29:392
7237992620,5cyclictest2235-21ssh22:06:422
7237992620,1cyclictest1308-21diskmemload23:20:422
7237992618,4cyclictest0-21swapper/223:40:272
723799260,25cyclictest0-21swapper/222:35:542
723799260,22cyclictest0-21swapper/223:32:432
723599260,21cyclictest0-21swapper/021:22:020
723599260,21cyclictest0-21swapper/000:11:180
723599260,1cyclictest0-21swapper/023:12:560
7239992523,1cyclictest17104-21rm22:50:413
723999250,24cyclictest0-21swapper/323:50:443
723999250,24cyclictest0-21swapper/300:35:543
7237992520,4cyclictest13993-21ssh21:49:432
7237992520,4cyclictest0-21swapper/223:15:172
723799250,24cyclictest26769-21idleruntime-cro22:30:012
723799250,24cyclictest1308-21diskmemload22:52:482
723799250,24cyclictest0-21swapper/223:29:512
723799250,24cyclictest0-21swapper/222:16:072
723799250,24cyclictest0-21swapper/221:54:222
723799250,21cyclictest0-21swapper/222:58:292
723799250,1cyclictest0-21swapper/222:11:102
723799250,0cyclictest0-21swapper/223:05:182
7236992523,1cyclictest0-21swapper/121:31:021
723699250,24cyclictest605-21avahi-daemon23:30:011
723699250,24cyclictest27817-21grep22:30:561
7235992520,4cyclictest1308-21diskmemload22:25:010
7235992520,4cyclictest1308-21diskmemload22:05:110
7235992519,1cyclictest8458-21cstates21:15:540
7235992518,1cyclictest0-21swapper/019:35:540
723599250,24cyclictest24722-21apt-get19:45:530
723599250,24cyclictest0-21swapper/023:32:450
723599250,24cyclictest0-21swapper/023:25:210
723599250,24cyclictest0-21swapper/022:43:520
723599250,24cyclictest0-21swapper/000:36:020
723599250,21cyclictest1308-21diskmemload21:40:310
723599250,21cyclictest0-21swapper/000:09:500
723599250,0cyclictest0-21swapper/021:32:490
7239992422,1cyclictest0-21swapper/321:56:393
723999240,23cyclictest1308-21diskmemload21:41:363
723999240,23cyclictest0-21swapper/320:30:553
723999240,0cyclictest7554-21ptp4l-jitter22:41:013
7237992422,1cyclictest18841-21perf20:40:002
7237992421,3cyclictest0-21swapper/223:52:472
7237992419,5cyclictest1308-21diskmemload22:24:532
723799240,24cyclictest0-21swapper/200:20:422
723799240,23cyclictest1308-21diskmemload22:00:352
723799240,23cyclictest0-21swapper/200:05:162
723799240,1cyclictest1308-21diskmemload21:31:372
723799240,0cyclictest0-21swapper/221:25:152
723799240,0cyclictest0-21swapper/219:45:022
723799240,0cyclictest0-21swapper/200:19:112
7236992424,0cyclictest0-21swapper/121:15:121
7236992422,1cyclictest25303-21sh23:55:521
7236992422,1cyclictest12032-21users00:11:041
723699240,24cyclictest0-21swapper/122:12:411
723699240,23cyclictest4200-21ssh23:06:511
723699240,23cyclictest32716-21kworker/u8:222:47:461
723699240,23cyclictest0-21swapper/121:25:521
723699240,23cyclictest0-21swapper/100:15:161
7235992420,3cyclictest0-21swapper/000:23:440
7235992420,0cyclictest0-21swapper/023:51:430
7235992419,1cyclictest8634-21df23:40:550
7235992419,1cyclictest30373-21ssh22:03:300
7235992419,1cyclictest0-21swapper/022:11:280
723599240,23cyclictest1308-21diskmemload22:51:100
723599240,23cyclictest0-21swapper/022:32:230
723599240,22cyclictest313-21systemd-journal19:25:010
723599240,1cyclictest0-21swapper/021:38:000
723599240,0cyclictest1308-21diskmemload23:06:000
723599240,0cyclictest0-21swapper/022:35:520
723599240,0cyclictest0-21swapper/021:11:220
7239992323,0cyclictest0-21swapper/323:35:473
7239992323,0cyclictest0-21swapper/322:25:363
7239992323,0cyclictest0-21swapper/321:49:123
7239992323,0cyclictest0-21swapper/321:24:563
7239992323,0cyclictest0-21swapper/300:21:583
7239992323,0cyclictest0-21swapper/300:04:543
7239992321,1cyclictest1308-21diskmemload23:45:583
7239992321,1cyclictest12439-21ssh23:44:213
7239992321,1cyclictest0-21swapper/322:32:233
723999231,21cyclictest34-21ksoftirqd/321:05:013
723999230,2cyclictest32679-21ssh22:35:163
723999230,2cyclictest11331-21ssh23:14:053
723999230,23cyclictest34-21ksoftirqd/300:27:223
723999230,23cyclictest1308-21diskmemload22:04:363
723999230,23cyclictest0-21swapper/323:21:123
723999230,23cyclictest0-21swapper/321:13:143
723999230,22cyclictest5392-21ssh23:08:313
723999230,22cyclictest4756-21apt-get20:10:523
723999230,22cyclictest29932-21latency_hist21:35:003
723999230,22cyclictest26817-21apt-get20:55:543
723999230,22cyclictest17118-21sh23:19:203
723999230,22cyclictest16179-21sh22:20:263
723999230,22cyclictest14030-21ssh22:46:373
723999230,22cyclictest1308-21diskmemload22:11:463
723999230,0cyclictest0-21swapper/323:30:303
723999230,0cyclictest0-21swapper/322:56:393
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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