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2026-05-21 - 10:30

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 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 rackcslot7s.osadl.org (updated Thu May 21, 2026 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
232071528043,13sleep00-21swapper/019:07:480
232083127657,14sleep10-21swapper/119:09:181
232061627338,9sleep30-21swapper/319:06:303
232057726748,13sleep20-21swapper/219:06:022
23943352430,4sleep00-21swapper/022:35:190
23298712430,4sleep23056-21PK-Backend19:30:202
23716472400,4sleep33056-21PK-Backend21:30:273
24001702340,2sleep13056-21PK-Backend22:51:081
2321019993211,6cyclictest436-20systemd-journal23:50:002
2321019992912,5cyclictest2386337-21sshd22:15:082
2321019992911,6cyclictest2427164-21fw_packets00:10:122
24101882270,9sleep013-21ksoftirqd/023:20:180
23419202270,3sleep13056-21PK-Backend20:05:231
232101999250,1cyclictest0-21swapper/200:25:052
232101599250,23cyclictest2387700-21chrt22:18:281
2321013992519,4cyclictest2393281-21cron22:35:000
2321013992515,7cyclictest2328639-21cron19:30:000
139099250,17rtkit-daemon3056-21PK-Backend23:52:341
2321015992412,10cyclictest2358143-21unin-run20:55:001
232101399240,5cyclictest0-21swapper/019:30:090
2321021992320,2cyclictest0-21swapper/322:28:443
2321019992318,3cyclictest2369088-21cstates21:25:112
2321015992318,3cyclictest2363902-21expr21:10:141
139099230,15rtkit-daemon3056-21PK-Backend00:00:081
2321021992220,1cyclictest0-21swapper/323:02:163
2321021992219,2cyclictest3056-21PK-Backend21:25:023
2321021992219,2cyclictest3056-21PK-Backend21:13:133
2321021992219,2cyclictest3056-21PK-Backend20:12:233
2321021992219,1cyclictest3056-21PK-Backend23:30:283
232102199220,20cyclictest0-21swapper/300:00:093
232101999226,3cyclictest0-21swapper/222:05:112
2321019992220,1cyclictest0-21swapper/223:38:552
2321019992220,1cyclictest0-21swapper/200:01:052
2321019992218,3cyclictest0-21swapper/219:18:372
2321019992215,1cyclictest0-21swapper/223:51:322
2321019992215,1cyclictest0-21swapper/220:01:152
2321015992220,1cyclictest0-21swapper/123:32:091
2321015992220,1cyclictest0-21swapper/121:24:401
2321013992219,2cyclictest3056-21PK-Backend22:14:560
139099220,15rtkit-daemon3056-21PK-Backend22:13:301
139099220,15rtkit-daemon3056-21PK-Backend19:48:181
139099220,15rtkit-daemon3056-21PK-Backend00:25:551
139099220,15rtkit-daemon0-21swapper/020:05:150
139099220,14rtkit-daemon0-21swapper/019:17:310
139099220,13rtkit-daemon0-21swapper/121:00:131
23724352210,4chrt0-21swapper/121:35:011
23269872210,4sleep12326989-21find19:25:011
2321021992119,1cyclictest0-21swapper/323:07:573
2321021992119,1cyclictest0-21swapper/322:45:263
2321021992119,1cyclictest0-21swapper/322:22:423
2321021992119,1cyclictest0-21swapper/322:03:353
2321021992119,1cyclictest0-21swapper/300:20:173
2321021992118,2cyclictest3056-21PK-Backend23:24:473
2321021992118,2cyclictest3056-21PK-Backend20:21:223
2321021992118,2cyclictest3056-21PK-Backend19:27:143
2321021992114,5cyclictest42-21ksoftirqd/323:50:113
232102199211,18cyclictest884-21gmain22:40:083
232102199210,20cyclictest0-21swapper/323:44:413
232102199210,20cyclictest0-21swapper/323:10:483
232102199210,20cyclictest0-21swapper/322:38:103
232102199210,20cyclictest0-21swapper/321:50:383
232102199210,20cyclictest0-21swapper/320:32:183
232102199210,20cyclictest0-21swapper/320:29:263
232102199210,20cyclictest0-21swapper/319:20:323
232102199210,20cyclictest0-21swapper/300:34:303
232102199210,20cyclictest0-21swapper/300:09:423
232102199210,1cyclictest3056-21PK-Backend22:32:083
232102199210,19cyclictest3056-21PK-Backend21:36:183
2321019992119,1cyclictest0-21swapper/223:42:472
2321019992119,1cyclictest0-21swapper/223:22:392
2321019992119,1cyclictest0-21swapper/223:13:062
2321019992119,1cyclictest0-21swapper/222:56:022
2321019992119,1cyclictest0-21swapper/222:44:402
2321019992119,1cyclictest0-21swapper/221:23:222
2321019992119,1cyclictest0-21swapper/221:08:552
2321019992119,1cyclictest0-21swapper/220:37:122
2321019992119,1cyclictest0-21swapper/219:59:472
2321019992119,1cyclictest0-21swapper/200:36:412
232101999211,7cyclictest2330662-21apt19:35:112
2321019992113,6cyclictest2433859-21expr00:30:112
232101999210,20cyclictest0-21swapper/223:26:312
232101999210,20cyclictest0-21swapper/220:56:452
232101999210,20cyclictest0-21swapper/220:18:532
232101999210,20cyclictest0-21swapper/220:11:572
2321015992119,1cyclictest3056-21PK-Backend19:35:171
2321015992119,1cyclictest0-21swapper/120:17:361
232101599210,20cyclictest0-21swapper/122:42:141
2321013992119,1cyclictest0-21swapper/022:23:340
2321013992117,2cyclictest2356378-21turbostat20:49:590
232101399210,20cyclictest0-21swapper/021:27:320
139099210,15rtkit-daemon0-21swapper/023:25:570
139099210,14rtkit-daemon3056-21PK-Backend21:59:131
139099210,14rtkit-daemon3056-21PK-Backend20:31:341
139099210,14rtkit-daemon3056-21PK-Backend00:20:231
139099210,14rtkit-daemon0-21swapper/023:02:120
139099210,14rtkit-daemon0-21swapper/000:19:290
139099210,13rtkit-daemon0-21swapper/123:23:161
139099210,13rtkit-daemon0-21swapper/120:20:451
232102199208,5cyclictest978-21snmpd19:55:203
2321021992018,1cyclictest0-21swapper/322:50:063
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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