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2026-05-30 - 20:36

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 Sat May 30, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139099810,70rtkit-daemon0-21swapper/007:05:080
348206027643,26sleep30-21swapper/307:06:293
34848882750,2sleep00-21swapper/007:15:110
348223227050,15sleep20-21swapper/207:08:412
348215726140,14sleep10-21swapper/107:07:421
34856022600,2sleep30-21swapper/307:15:183
35546462590,3sleep00-21swapper/010:30:190
139099380,3rtkit-daemon0-21swapper/212:33:352
139099380,3rtkit-daemon0-21swapper/211:27:462
139099380,3rtkit-daemon0-21swapper/211:17:072
139099380,3rtkit-daemon0-21swapper/209:57:512
139099370,3rtkit-daemon0-21swapper/211:21:272
139099370,3rtkit-daemon0-21swapper/210:54:052
139099370,3rtkit-daemon0-21swapper/210:54:042
139099370,3rtkit-daemon0-21swapper/210:42:182
139099370,3rtkit-daemon0-21swapper/209:48:052
139099360,3rtkit-daemon0-21swapper/212:20:452
139099360,3rtkit-daemon0-21swapper/212:12:512
139099360,3rtkit-daemon0-21swapper/211:36:152
139099350,2rtkit-daemon0-21swapper/209:22:342
348246799259,14cyclictest3571053-21sed11:20:013
3482465992515,7cyclictest3583359-21cron11:55:002
35523422240,3sleep20-21swapper/210:25:172
35470402240,2sleep1251rcuc/110:10:151
348246799246,16cyclictest3576474-21cut11:35:003
348246799240,22cyclictest3541930-21/usr/sbin/munin09:55:183
348246199242,19cyclictest3519583-21taskset08:54:541
348246199242,19cyclictest3519583-21taskset08:54:541
3482461992414,8cyclictest883-21dbus-daemon10:25:001
35860192230,10sleep342-21ksoftirqd/312:00:173
3482467992310,11cyclictest3505510-21unin-run08:15:003
3482465992320,2cyclictest0-21swapper/209:52:162
348246199231,3cyclictest3554173-21memory10:30:151
348246199230,21cyclictest3581519-21chrt11:48:351
3482467992220,1cyclictest0-21swapper/309:49:303
3482467992216,5cyclictest2085813-21snapd11:01:143
348246799220,21cyclictest0-21swapper/309:10:373
3482465992220,1cyclictest0-21swapper/209:01:272
3482465992220,1cyclictest0-21swapper/208:46:462
3482465992217,3cyclictest3532001-20cron09:30:012
3482465992212,7cyclictest436-20systemd-journal09:10:002
348246199223,4cyclictest26-21ksoftirqd/107:15:021
3482461992220,1cyclictest0-21swapper/111:26:391
3482461992220,1cyclictest0-21swapper/110:05:351
3482461992219,2cyclictest3056-21PK-Backend10:45:151
3482461992216,3cyclictest3530012-21sh09:25:001
35856342210,3sleep20-21swapper/212:00:112
35092382210,4sleep00-21swapper/008:25:010
35045422210,3chrt3056-21PK-Backend08:10:160
348246799211,9cyclictest3492741-21/usr/sbin/munin07:35:203
3482467992119,1cyclictest0-21swapper/309:05:373
3482467992113,7cyclictest3581914-21apt11:50:133
3482467992113,6cyclictest3595780-21awk12:30:113
3482467992113,6cyclictest3562654-21hddtemp_smartct10:55:163
3482467992113,6cyclictest3544981-21awk10:05:123
348246799210,2cyclictest3556921-21sed10:40:003
348246799210,20cyclictest0-21swapper/308:06:363
348246599212,13cyclictest3543197-21apt10:00:112
3482465992119,1cyclictest0-21swapper/211:44:242
3482465992119,1cyclictest0-21swapper/211:44:232
3482465992119,1cyclictest0-21swapper/211:13:412
3482465992119,1cyclictest0-21swapper/210:15:482
3482465992119,1cyclictest0-21swapper/209:41:482
3482465992119,1cyclictest0-21swapper/208:39:442
3482465992119,1cyclictest0-21swapper/208:24:222
3482465992119,1cyclictest0-21swapper/208:16:512
3482465992119,1cyclictest0-21swapper/207:34:272
3482465992119,1cyclictest0-21swapper/207:23:182
348246599210,20cyclictest0-21swapper/211:06:452
348246599210,20cyclictest0-21swapper/210:08:252
348246199219,9cyclictest883-21dbus-daemon10:30:001
3482461992119,1cyclictest3056-21PK-Backend11:02:111
3482461992119,1cyclictest3056-21PK-Backend10:41:301
3482461992119,1cyclictest3056-21PK-Backend10:03:111
3482461992119,1cyclictest3056-21PK-Backend08:45:441
3482461992119,1cyclictest3056-21PK-Backend07:22:441
3482461992119,1cyclictest0-21swapper/111:35:511
3482461992119,1cyclictest0-21swapper/111:08:541
3482461992119,1cyclictest0-21swapper/110:18:181
3482461992119,1cyclictest0-21swapper/109:18:221
3482461992119,1cyclictest0-21swapper/107:45:491
3482461992110,8cyclictest883-21dbus-daemon09:35:001
3482461992110,8cyclictest3521369-21unin-run09:00:001
348246199210,20cyclictest3056-21PK-Backend12:16:061
348246199210,20cyclictest3056-21PK-Backend09:47:491
348246199210,20cyclictest3056-21PK-Backend08:42:201
348246199210,20cyclictest3056-21PK-Backend08:11:521
348246199210,20cyclictest3056-21PK-Backend08:06:241
348246199210,20cyclictest0-21swapper/112:38:171
348246199210,20cyclictest0-21swapper/112:38:171
348246199210,1cyclictest0-21swapper/108:37:541
348246199210,19cyclictest3484144-21dump-pmu-power07:15:001
348246199210,19cyclictest3056-21PK-Backend12:27:291
348246199210,19cyclictest3056-21PK-Backend12:01:331
348246199210,19cyclictest3056-21PK-Backend11:42:541
348246199210,19cyclictest3056-21PK-Backend11:42:541
348246199210,19cyclictest3056-21PK-Backend10:50:231
348246199210,19cyclictest3056-21PK-Backend10:50:221
348246199210,19cyclictest3056-21PK-Backend07:52:381
3482458992113,6cyclictest3539838-21df_inode09:50:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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