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2026-08-05 - 16:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Wed Aug 05, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
370419921260,2sleep33056-21PK-Backend11:14:413
367968621210,3sleep30-21swapper/310:10:213
369689021180,2sleep13056-21PK-Backend11:00:191
36588102730,3sleep33056-21PK-Backend08:15:003
139099730,60rtkit-daemon0-21swapper/307:06:023
364876526545,14sleep20-21swapper/207:06:102
364876926440,17sleep10-21swapper/107:06:131
364878826342,14sleep00-21swapper/007:06:280
36897842450,4sleep13056-21PK-Backend10:40:181
3649294993119,9cyclictest883-21dbus-daemon11:14:061
139099310,4rtkit-daemon1389-21rtkit-daemon11:19:233
139099310,4rtkit-daemon1389-21rtkit-daemon10:48:243
36530572300,6sleep10-21swapper/107:35:001
37345962290,4chrt3056-21PK-Backend12:15:130
3649303992816,9cyclictest899-21polkitd11:15:362
3649285992719,6cyclictest883-21dbus-daemon11:16:130
3649303992621,3cyclictest34-21ksoftirqd/211:13:582
3649285992520,4cyclictest2019-21gmain11:05:000
3649285992516,7cyclictest883-21dbus-daemon11:14:360
139099250,4rtkit-daemon1389-21rtkit-daemon08:48:092
139099240,3rtkit-daemon1389-21rtkit-daemon10:38:252
37397212230,4sleep00-21swapper/012:30:010
364930599230,21cyclictest3056-21PK-Backend08:56:133
3649294992315,6cyclictest883-21dbus-daemon11:15:291
3649294992311,9cyclictest883-21dbus-daemon10:13:041
139099230,4rtkit-daemon1389-21rtkit-daemon11:33:002
37328392220,4sleep30-21swapper/312:10:113
3649305992215,5cyclictest3690614-21cron10:45:003
3649305992214,6cyclictest883-21dbus-daemon12:16:113
364930599220,20cyclictest3736804-21diskstats12:20:143
364930599220,20cyclictest3056-21PK-Backend09:20:263
364930599220,20cyclictest3056-21PK-Backend07:37:183
3649303992220,1cyclictest0-21swapper/209:54:582
3649303992220,1cyclictest0-21swapper/209:06:112
3649303992220,1cyclictest0-21swapper/208:40:232
3649303992220,1cyclictest0-21swapper/207:55:212
3649303992220,1cyclictest0-21swapper/207:17:422
3649303992220,1cyclictest0-21swapper/207:17:422
364930399220,21cyclictest0-21swapper/208:29:212
3649294992220,1cyclictest3056-21PK-Backend11:28:101
3649294992220,1cyclictest3056-21PK-Backend10:47:551
3649294992220,1cyclictest0-21swapper/110:05:441
3649294992220,1cyclictest0-21swapper/109:19:061
3649294992214,6cyclictest436-20systemd-journal11:55:001
364929499220,9cyclictest36715482cpu09:50:081
3649285992214,6cyclictest436-20systemd-journal09:20:000
364928599220,20cyclictest0-21swapper/012:37:510
139099220,4rtkit-daemon1389-21rtkit-daemon08:54:122
139099220,3rtkit-daemon1389-21rtkit-daemon11:37:152
139099220,18rtkit-daemon1009-21lldpd10:37:303
3649305992119,1cyclictest3056-21PK-Backend11:03:283
364930599210,3cyclictest3673057-21munin-run09:55:013
364930599210,2cyclictest3056-21PK-Backend07:41:103
364930599210,1cyclictest3056-21PK-Backend12:37:513
364930599210,1cyclictest3056-21PK-Backend07:20:023
364930599210,1cyclictest3056-21PK-Backend07:20:013
364930599210,19cyclictest3056-21PK-Backend08:50:183
364930599210,19cyclictest3056-21PK-Backend08:26:193
3649303992119,1cyclictest3056-21PK-Backend08:23:332
3649303992119,1cyclictest0-21swapper/212:20:392
3649303992119,1cyclictest0-21swapper/211:09:272
3649303992119,1cyclictest0-21swapper/210:11:282
3649303992119,1cyclictest0-21swapper/210:07:022
3649303992119,1cyclictest0-21swapper/209:59:112
3649303992119,1cyclictest0-21swapper/209:33:022
3649303992119,1cyclictest0-21swapper/209:12:202
3649303992119,1cyclictest0-21swapper/208:06:362
3649303992119,1cyclictest0-21swapper/207:46:152
3649303992115,4cyclictest34-21ksoftirqd/212:07:352
3649303992113,6cyclictest3661750-21munin-plugin-st08:40:002
364930399210,20cyclictest0-21swapper/211:21:172
364930399210,20cyclictest0-21swapper/210:46:162
364930399210,20cyclictest0-21swapper/207:38:172
364930399210,1cyclictest3739909-21apt12:30:122
3649294992119,1cyclictest0-21swapper/111:36:011
3649294992119,1cyclictest0-21swapper/109:49:071
3649294992119,1cyclictest0-21swapper/109:33:531
3649294992119,1cyclictest0-21swapper/109:21:581
3649294992119,1cyclictest0-21swapper/108:27:351
3649294992119,1cyclictest0-21swapper/108:14:511
3649294992119,1cyclictest0-21swapper/108:06:471
3649294992119,1cyclictest0-21swapper/108:04:181
3649294992117,3cyclictest3687158-21turbostat.cron10:35:001
364929499210,20cyclictest3056-21PK-Backend11:22:291
364929499210,20cyclictest0-21swapper/107:56:051
364929499210,19cyclictest3056-21PK-Backend12:30:021
3649285992114,6cyclictest3668264-21apt-get09:30:000
364928599210,20cyclictest0-21swapper/011:27:040
364928599210,20cyclictest0-21swapper/008:11:080
364928599210,19cyclictest3056-21PK-Backend10:45:030
139099210,17rtkit-daemon3649278-21cyclictest08:23:333
3649305992018,1cyclictest3056-21PK-Backend08:30:113
3649305992018,1cyclictest0-21swapper/310:15:083
3649305992016,2cyclictest3693022-21hddtemp_smartct10:50:173
364930599200,1cyclictest3056-21PK-Backend10:20:433
364930599200,1cyclictest3056-21PK-Backend09:01:003
364930599200,1cyclictest3056-21PK-Backend08:08:143
364930599200,1cyclictest3056-21PK-Backend07:27:523
364930599200,1cyclictest0-21swapper/312:30:353
364930599200,19cyclictest3056-21PK-Backend11:53:233
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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