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2026-07-03 - 02:21

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 Jul 03, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1687422650,1sleep339-21rcuc/319:05:163
182112242165,25sleep20-21swapper/219:09:102
179842231162,56sleep00-21swapper/019:06:140
182102202165,24sleep10-21swapper/119:09:091
141382510,4sleep011-21rcuc/021:25:120
217892480,1sleep10-21swapper/100:10:121
217892480,1sleep10-21swapper/100:10:121
45062400,1sleep30-21swapper/319:50:123
1835899359,12cyclictest5490-21munin-run22:20:010
1836699331,9cyclictest0-21swapper/121:21:071
1836699321,9cyclictest0-21swapper/120:19:031
1836699321,9cyclictest0-21swapper/119:26:151
1836699321,9cyclictest0-21swapper/119:26:151
1835899325,12cyclictest26241-21awk20:40:010
1835899321,15cyclictest32499-21idleruntime-cro00:35:010
1836699311,11cyclictest0-21swapper/122:50:471
1836699310,11cyclictest0-21swapper/121:56:421
1835899302,15cyclictest2663-21munin-run21:00:010
1836699291,10cyclictest0-21swapper/100:08:551
1836699290,11cyclictest0-21swapper/121:30:231
1836699280,12cyclictest0-21swapper/122:47:151
1836699280,11cyclictest0-21swapper/122:24:191
1836699280,10cyclictest0-21swapper/122:33:551
1836699280,10cyclictest0-21swapper/120:26:191
18358992811,14cyclictest30639-21perf20:50:010
1835899280,12cyclictest13669-21awk21:25:010
18378992714,3cyclictest18245-1kworker/u9:222:19:583
1836699271,9cyclictest0-21swapper/119:19:511
1836699271,21cyclictest0-21swapper/123:11:071
1836699271,11cyclictest808-21snmpd21:37:311
1836699271,10cyclictest26125-21/usr/sbin/munin21:50:231
1836699270,9cyclictest0-21swapper/119:55:421
1836699270,12cyclictest0-21swapper/123:40:351
1836699270,12cyclictest0-21swapper/123:34:591
1836699270,10cyclictest0-21swapper/121:15:251
1835899270,13cyclictest16484-21perf22:45:010
305202261,3sleep10-21swapper/100:30:021
1836699263,7cyclictest0-21swapper/120:45:291
1836699261,9cyclictest0-21swapper/120:54:271
1836699261,8cyclictest0-21swapper/122:57:231
1836699261,11cyclictest0-21swapper/122:14:551
1836699261,11cyclictest0-21swapper/120:57:511
1836699261,10cyclictest0-21swapper/123:01:471
1836699261,10cyclictest0-21swapper/123:01:471
1836699260,9cyclictest0-21swapper/119:40:151
1836699260,5cyclictest0-21swapper/121:25:431
1836699260,20cyclictest0-21swapper/100:25:471
1836699260,11cyclictest0-21swapper/122:43:231
1836699260,11cyclictest0-21swapper/100:36:071
1836699260,10cyclictest0-21swapper/100:00:231
1835899269,14cyclictest368-21perf20:55:010
18371992519,4cyclictest8728-21/usr/sbin/munin22:25:182
1837199251,6cyclictest0-21swapper/222:06:352
1837199251,6cyclictest0-21swapper/200:33:542
1836699251,9cyclictest0-21swapper/122:36:351
1836699251,12cyclictest8196-21sshd23:38:511
1836699251,12cyclictest0-21swapper/120:06:471
1836699251,10cyclictest0-21swapper/120:31:251
1836699250,9cyclictest0-21swapper/121:04:071
1836699250,9cyclictest0-21swapper/100:20:591
1836699250,6cyclictest0-21swapper/119:36:591
1836699250,16cyclictest0-21swapper/121:10:431
1836699250,11cyclictest0-21swapper/123:47:431
1836699250,10cyclictest0-21swapper/123:52:431
1836699250,10cyclictest0-21swapper/123:20:351
1836699250,10cyclictest0-21swapper/122:19:191
1835899257,15cyclictest20879-21munin-run22:55:010
225622240,3sleep00-21swapper/022:55:270
1837899242,12cyclictest26659-40dnf21:52:483
1837899241,16cyclictest0-21swapper/322:01:193
1837199241,6cyclictest0-21swapper/223:29:152
1836699248,3cyclictest0-21swapper/120:40:051
1836699248,3cyclictest0-21swapper/120:40:051
1836699242,12cyclictest10858-21munin-run20:05:011
1836699241,9cyclictest0-21swapper/123:56:071
1836699241,9cyclictest0-21swapper/119:31:491
1836699241,14cyclictest0-21swapper/123:15:031
1836699241,13cyclictest0-21swapper/122:00:071
1836699241,11cyclictest26599-21open_inodes23:05:211
1836699241,10cyclictest0-21swapper/120:36:471
1836699240,9cyclictest0-21swapper/121:41:111
94532231,2sleep30-21swapper/320:00:163
1837899231,7cyclictest0-21swapper/323:58:593
18378992315,5cyclictest28425-21dump-pmu-power20:45:013
18378992315,5cyclictest28425-21dump-pmu-power20:45:013
1837199235,6cyclictest0-21swapper/222:37:302
1837199231,7cyclictest0-21swapper/221:16:032
1837199231,6cyclictest0-21swapper/223:17:482
1837199231,6cyclictest0-21swapper/222:32:532
1836699236,3cyclictest0-21swapper/119:21:131
1836699231,9cyclictest0-21swapper/120:10:531
1836699231,9cyclictest0-21swapper/119:50:091
1836699231,9cyclictest0-21swapper/119:11:171
1836699231,11cyclictest0-21swapper/120:24:331
1836699230,8cyclictest0-21swapper/121:06:151
1836699230,8cyclictest0-21swapper/100:19:111
1836699230,15cyclictest0-21swapper/122:25:271
1836699230,10cyclictest0-21swapper/121:45:191
9852220,2sleep20-21swapper/220:55:122
196692221,3sleep30-21swapper/321:35:283
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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