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2026-04-12 - 07:47

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 12, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
133072238164,24sleep20-21swapper/219:07:562
131362230162,55sleep00-21swapper/019:05:460
130992217187,20sleep30-21swapper/319:05:273
133512203167,24sleep10-21swapper/119:08:321
2766521330,3sleep027664-21strings22:05:210
1355999106103,2cyclictest0-21swapper/220:47:252
13559999794,2cyclictest0-21swapper/221:03:412
111402630,3sleep339-21rcuc/323:55:203
37252510,3sleep23728-21sendmail_mailqu21:10:252
268592500,5sleep21355999cyclictest20:50:182
1356499361,6cyclictest0-21swapper/322:04:513
1356499341,13cyclictest0-21swapper/323:13:373
1356499321,15cyclictest0-21swapper/323:25:573
1355299301,20cyclictest0-21swapper/100:16:221
1354599305,12cyclictest1633-21munin-run19:55:020
13564992915,3cyclictest7146-40dnf23:45:243
1356499291,13cyclictest0-21swapper/322:38:133
1356499281,12cyclictest0-21swapper/319:34:103
13559992825,2cyclictest0-21swapper/223:34:592
1355999281,19cyclictest0-21swapper/200:16:432
1355999281,11cyclictest0-21swapper/222:20:032
13564992712,3cyclictest23926-21seq21:56:103
13564992711,3cyclictest14539-21ntp_states21:35:223
13564992711,3cyclictest14539-21ntp_states21:35:223
1356499271,13cyclictest0-21swapper/322:22:413
1356499271,12cyclictest0-21swapper/320:26:133
1356499271,12cyclictest0-21swapper/320:14:133
13564992710,9cyclictest0-21swapper/321:30:543
1355299274,9cyclictest0-21swapper/122:15:501
1355299271,17cyclictest0-21swapper/123:10:391
1354599275,11cyclictest0-21swapper/019:50:020
1356499261,14cyclictest0-21swapper/322:59:453
1356499261,13cyclictest7460-21latency_hist22:35:013
1356499261,13cyclictest0-21swapper/321:21:583
13564992611,3cyclictest0-21swapper/320:22:133
13564992611,3cyclictest0-21swapper/320:22:133
1356499261,12cyclictest0-21swapper/323:01:453
1356499261,12cyclictest0-21swapper/322:19:173
1356499261,12cyclictest0-21swapper/321:28:143
1356499261,12cyclictest0-21swapper/320:01:453
1356499261,12cyclictest0-21swapper/319:53:093
1356499261,11cyclictest0-21swapper/321:00:493
1356499261,11cyclictest0-21swapper/320:40:413
1356499261,11cyclictest0-21swapper/319:42:533
1356499261,11cyclictest0-21swapper/319:25:103
1356499261,10cyclictest0-21swapper/319:24:143
13564992610,3cyclictest0-21swapper/323:09:093
1355999261,11cyclictest0-21swapper/223:18:242
13552992611,13cyclictest16870-21kworker/u8:020:39:571
1354599261,14cyclictest11982-21cpuspeed_turbos22:45:130
1354599261,14cyclictest11982-21cpuspeed_turbos22:45:130
1356499259,3cyclictest0-21swapper/320:46:213
1356499259,3cyclictest0-21swapper/320:36:093
1356499259,3cyclictest0-21swapper/300:28:013
1356499258,3cyclictest0-21swapper/320:34:133
1356499258,11cyclictest0-21swapper/323:30:533
1356499257,3cyclictest0-21swapper/321:08:413
1356499251,14cyclictest0-21swapper/323:42:263
1356499251,14cyclictest0-21swapper/322:48:173
1356499251,14cyclictest0-21swapper/322:48:173
1356499251,13cyclictest0-21swapper/323:52:503
1356499251,12cyclictest2262-21diskmemload00:09:183
1356499251,12cyclictest0-21swapper/321:52:383
1356499251,11cyclictest0-21swapper/323:23:093
1356499251,11cyclictest0-21swapper/322:06:103
1356499251,11cyclictest0-21swapper/300:02:023
1356499251,11cyclictest0-21swapper/300:02:023
13564992510,8cyclictest0-21swapper/322:50:133
13564992510,3cyclictest0-21swapper/320:57:093
13564992510,3cyclictest0-21swapper/319:36:173
1355299256,8cyclictest0-21swapper/100:25:471
1355299251,9cyclictest0-21swapper/121:27:211
1355299251,8cyclictest0-21swapper/121:36:581
1355299251,8cyclictest0-21swapper/121:36:581
1356499249,8cyclictest0-21swapper/300:32:053
1356499249,3cyclictest0-21swapper/322:13:133
1356499249,3cyclictest0-21swapper/320:53:133
1356499249,3cyclictest0-21swapper/319:10:453
1356499249,3cyclictest0-21swapper/300:11:383
1356499248,4cyclictest0-21swapper/323:17:453
1356499248,3cyclictest0-21swapper/322:40:333
1356499248,3cyclictest0-21swapper/319:48:173
1356499248,3cyclictest0-21swapper/319:18:503
1356499247,3cyclictest0-21swapper/323:39:343
1356499241,12cyclictest0-21swapper/321:16:423
1356499241,12cyclictest0-21swapper/321:14:013
1356499241,11cyclictest0-21swapper/300:39:413
1356499241,11cyclictest0-21swapper/300:15:343
1355299246,7cyclictest0-21swapper/122:50:591
1355299241,21cyclictest2272-21perf21:10:011
1354599246,4cyclictest13538-21cyclictest19:45:020
1354599242,12cyclictest2262-21diskmemload00:31:280
1354599240,14cyclictest17790-21latency00:10:180
1356499239,3cyclictest2262-21diskmemload00:22:383
1356499239,3cyclictest0-21swapper/321:47:063
1356499239,3cyclictest0-21swapper/320:18:533
1356499239,3cyclictest0-21swapper/319:55:053
1356499238,3cyclictest0-21swapper/321:44:223
1356499231,10cyclictest0-21swapper/322:26:133
1355999235,10cyclictest0-21swapper/222:40:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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