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2026-04-19 - 21:32

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 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 rack5slot3s.osadl.org (updated Sun Apr 19, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29662230162,55sleep10-21swapper/107:07:491
29432203166,24sleep30-21swapper/307:07:323
30862202165,24sleep20-21swapper/207:09:242
28052201164,25sleep00-21swapper/007:05:440
1628521820,5sleep3323399cyclictest10:05:013
412121580,3sleep2322999cyclictest08:20:262
2885921570,5sleep2322999cyclictest09:20:012
233221560,4sleep1322199cyclictest12:00:131
2425121010,2sleep20-21swapper/207:55:142
179882640,1sleep10-21swapper/112:35:161
179882640,1sleep10-21swapper/112:35:161
13192600,4sleep2322999cyclictest10:45:012
222942560,1sleep20-21swapper/211:30:202
102222510,2sleep2322999cyclictest12:15:272
66512480,1sleep16650-21grep12:10:121
283292460,1sleep20-21swapper/208:05:122
3213993711,13cyclictest18310-21munin-run10:10:010
3213993711,13cyclictest18310-21munin-run10:10:000
321399339,11cyclictest15484-21munin-run08:50:000
321399335,19cyclictest579-21systemd-journal11:08:540
322199321,11cyclictest0-21swapper/108:49:471
322199321,10cyclictest0-21swapper/108:05:031
322199320,24cyclictest0-21swapper/111:10:371
321399316,12cyclictest4169-21munin-run12:05:020
321399312,13cyclictest24473-21missed_timers11:35:200
322199301,10cyclictest16273-21cat12:30:191
321399300,15cyclictest26083-21/usr/sbin/munin08:00:230
322199291,19cyclictest12153-21proc_pri12:20:231
322199291,11cyclictest0-21swapper/111:42:151
322199290,13cyclictest0-21swapper/110:06:371
322199290,13cyclictest0-21swapper/110:06:371
322199290,12cyclictest0-21swapper/110:10:531
322199281,10cyclictest0-21swapper/107:41:061
322199280,26cyclictest0-21swapper/110:48:411
322199280,11cyclictest0-21swapper/109:26:051
322199280,10cyclictest0-21swapper/107:17:351
321399282,14cyclictest13301-21awk08:45:000
322199271,16cyclictest0-21swapper/107:12:291
322199271,10cyclictest31160-21smartctl08:10:151
322199270,17cyclictest0-21swapper/107:34:301
322199270,13cyclictest0-21swapper/109:40:011
321399273,12cyclictest29304-21munin-run10:35:010
321399272,12cyclictest10484-21munin-run07:25:010
321399271,13cyclictest16737-21munin-run11:20:010
322999261,6cyclictest0-21swapper/211:43:092
322199261,9cyclictest0-21swapper/108:33:571
3221992615,3cyclictest11315-21/usr/sbin/munin08:40:121
322199261,11cyclictest0-21swapper/108:16:031
322199261,11cyclictest0-21swapper/107:57:591
322199261,10cyclictest0-21swapper/108:02:271
321399263,11cyclictest24283-21diskmemload09:45:010
3213992613,3cyclictest17189-21kworker/0:112:35:170
3213992613,3cyclictest17189-21kworker/0:112:35:160
321399261,13cyclictest27102-21munin-run10:30:010
3213992610,7cyclictest8024-21latency_hist11:00:010
322999251,20cyclictest0-21swapper/211:16:262
322199251,12cyclictest0-21swapper/109:02:361
322199251,10cyclictest0-21swapper/111:45:031
322199251,10cyclictest0-21swapper/109:50:191
322199250,15cyclictest0-21swapper/110:44:371
322199250,10cyclictest0-21swapper/109:58:191
322199250,10cyclictest0-21swapper/108:21:151
321399256,8cyclictest15034-21taskset12:28:410
321399253,13cyclictest715-21uname11:55:180
321399252,5cyclictest87350irq/126-enp1s0-12:34:480
321399251,7cyclictest0-21swapper/010:43:290
321399251,12cyclictest17686-21munin-run08:55:000
323399248,9cyclictest0-21swapper/307:15:133
323399240,10cyclictest827-21runrttasks10:10:513
322999247,3cyclictest0-21swapper/209:42:192
322199241,5cyclictest0-21swapper/109:13:191
322199241,10cyclictest0-21swapper/112:09:251
322199241,10cyclictest0-21swapper/108:37:231
322199240,9cyclictest0-21swapper/111:15:271
322199240,8cyclictest0-21swapper/110:15:571
322199240,2cyclictest0-21swapper/110:33:491
322199240,10cyclictest0-21swapper/110:50:481
322199240,10cyclictest0-21swapper/108:53:271
321399245,16cyclictest20508-21munin-run10:15:000
321399244,7cyclictest17205-21latency_hist07:40:010
321399243,13cyclictest26326-21chrt09:13:100
321399242,9cyclictest23033-21/usr/sbin/munin07:50:250
321399241,19cyclictest24283-21diskmemload10:50:160
321399241,15cyclictest7978-21fschecks_count09:45:160
321399241,12cyclictest11721-21awk09:55:010
321399240,13cyclictest8367-21ls08:30:270
323399239,3cyclictest30952-21irqstats11:50:183
323399231,15cyclictest0-21swapper/311:40:123
3229992320,2cyclictest0-21swapper/210:49:192
322999231,4cyclictest0-21swapper/208:10:142
322199237,2cyclictest0-21swapper/109:45:231
322199231,9cyclictest0-21swapper/111:02:551
322199231,9cyclictest0-21swapper/107:48:191
322199231,9cyclictest0-21swapper/107:48:181
322199231,9cyclictest0-21swapper/107:35:181
322199231,3cyclictest0-21swapper/112:25:031
322199231,19cyclictest6929-21users09:40:251
322199231,12cyclictest10484-21munin-run07:25:011
322199231,11cyclictest0-21swapper/110:28:471
322199231,10cyclictest24283-21diskmemload11:36:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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