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2026-03-14 - 05:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, 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 792 highest latencies:
System rack2slot7s.osadl.org (updated Fri Mar 13, 2026 19:54:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2998789996850,14cyclictest3823734-21rm18:10:490
2998791996151,6cyclictest3821410-21sh18:10:422
2998789995951,5cyclictest3241688-21wc17:40:480
299878999582,49cyclictest151ktimers/017:35:300
2998789995649,4cyclictest3776650-21multi.sh18:08:540
2998791995447,4cyclictest2998788-21cyclictest17:28:492
2998791995447,4cyclictest2998788-21cyclictest17:28:492
2998791995445,5cyclictest3235728-21multi.sh17:40:302
2998791995243,6cyclictest3747235-21sh18:07:422
2998791995240,5cyclictest0-21swapper/217:50:382
2998790995245,4cyclictest3805174-21tee18:10:011
2998790995242,7cyclictest3820067-21multi.sh18:10:381
2998789994938,7cyclictest3307301-21execl17:50:320
2998790994739,5cyclictest3259207-21wc17:41:341
2998790994737,5cyclictest0-21swapper/117:20:351
2998790994639,4cyclictest3229542-21tee17:40:011
2998789994633,11cyclictest3003496-21cron17:20:000
2998789994633,11cyclictest3003496-21cron17:20:000
2998790994537,5cyclictest3307302-21execl17:50:351
2998790994436,5cyclictest3312069-21sh18:02:001
2998790994335,5cyclictest3886510-21grep18:40:001
2998791994133,5cyclictest3399964-21spawn18:03:122
2998791994133,5cyclictest0-21swapper/218:40:002
2998791994131,7cyclictest3310375-21idleruntime-cro18:00:012
2998791994131,5cyclictest0-21swapper/218:15:342
2998790994132,6cyclictest564-21dbus-daemon17:15:011
299879199404,32cyclictest1167-21mta-sts-daemon18:30:342
2998790994032,5cyclictest2998887-21latency_hist17:05:021
2998790994032,5cyclictest2998887-21latency_hist17:05:021
299879199393,28cyclictest3003756-21execl17:20:292
2998790993931,6cyclictest271ktimers/118:20:301
2998789993932,5cyclictest3309548-21ntpq17:55:290
2998789993931,5cyclictest3311981-21context118:01:180
2998790993830,6cyclictest271ktimers/117:25:351
2998790993830,6cyclictest271ktimers/117:25:351
2998789993830,6cyclictest3305693-21sh17:45:310
2998789993827,5cyclictest0-21swapper/018:15:330
2998791993727,7cyclictest3197591-21needreboot17:35:282
2998789993725,9cyclictest0-21swapper/017:10:010
2998791993627,6cyclictest1-21systemd17:10:012
2998791993625,8cyclictest3882837-21needreboot18:25:282
2998791993620,11cyclictest3306304-21dhry2reg17:45:342
2998790993628,5cyclictest2989989-21kworker/u8:4+xprtiod17:50:021
2998790993626,7cyclictest3308667-21fstime17:55:141
2998789993630,4cyclictest3880864-21aten_r2power_fr18:20:200
2998790993528,4cyclictest3883859-21/usr/sbin/munin18:30:211
2998791993429,3cyclictest0-21swapper/218:20:312
2998790993411,16cyclictest271ktimers/118:25:351
299879099331,27cyclictest3007160-21pipe17:30:301
299879099331,27cyclictest3007160-21pipe17:30:301
2998791993225,3cyclictest0-21swapper/217:30:302
2998791993225,3cyclictest0-21swapper/217:30:302
299879099324,21cyclictest871-21ntpd18:15:361
2998790993225,5cyclictest3000286-21systemd-run17:10:011
2998789993220,10cyclictest0-21swapper/018:30:280
2998791993125,3cyclictest0-21swapper/217:15:012
299879099314,10cyclictest171rcu_preempt17:15:281
299879099314,10cyclictest171rcu_preempt17:15:281
2998789993123,6cyclictest3006504-21head17:25:450
2998789993123,6cyclictest3006504-21head17:25:450
2998791993023,4cyclictest3003508-21awk17:20:002
2998791993023,4cyclictest3003508-21awk17:20:002
2998789993024,4cyclictest3005199-21latency_hist17:25:020
2998789993020,5cyclictest12550irq/33-eth017:10:300
2998789993011,15cyclictest564-21dbus-daemon18:35:290
2998791992618,6cyclictest564-21dbus-daemon17:05:012
2998791992618,6cyclictest564-21dbus-daemon17:05:012
2998789992412,5cyclictest3883536-21systemd-run18:30:010
299878999241,20cyclictest3007585-21ntpq17:30:310
299878999241,20cyclictest3007585-21ntpq17:30:310
299879299214,9cyclictest0-21swapper/318:00:323
299879299202,10cyclictest0-21swapper/317:40:343
2998789992016,2cyclictest0-21swapper/017:05:020
2998789992016,2cyclictest0-21swapper/017:05:020
299879299173,9cyclictest0-21swapper/317:50:333
299879299173,6cyclictest0-21swapper/317:15:303
299879299173,6cyclictest0-21swapper/317:15:303
299879299172,9cyclictest0-21swapper/318:10:393
299879299172,7cyclictest0-21swapper/317:25:323
299879299172,7cyclictest0-21swapper/317:25:323
299879299171,8cyclictest0-21swapper/318:30:303
299879299155,7cyclictest0-21swapper/318:05:293
299879299141,6cyclictest0-21swapper/318:15:293
299879299141,6cyclictest0-21swapper/317:35:323
299879299133,7cyclictest0-21swapper/317:55:143
299879299132,7cyclictest0-21swapper/317:45:183
299879299132,6cyclictest0-21swapper/318:30:013
299879299132,5cyclictest0-21swapper/318:35:293
299879299131,7cyclictest0-21swapper/317:30:303
299879299131,7cyclictest0-21swapper/317:30:303
299879299131,5cyclictest0-21swapper/317:20:193
299879299121,7cyclictest0-21swapper/317:10:363
299879299110,6cyclictest0-21swapper/317:05:303
29987929991,4cyclictest0-21swapper/318:20:363
29987929971,3cyclictest0-21swapper/317:05:003
29987929971,3cyclictest0-21swapper/317:05:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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