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2026-03-16 - 03:11

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 100 highest latencies:
System rack2slot7s.osadl.org (updated Sun Mar 15, 2026 19:54:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3566477997663,9cyclictest202320-21sh18:10:381
3566477997663,9cyclictest202320-21sh18:10:381
3566478996554,8cyclictest3809365-21sh17:40:402
3566476996149,10cyclictest3808322-21rm17:40:360
3566477995848,6cyclictest3807053-21sh17:40:321
3566478995746,8cyclictest3878477-21execl17:50:342
3566477995547,5cyclictest164198-21sh18:09:081
3566478995344,5cyclictest148717-21sh18:08:302
3566478995243,5cyclictest202865-21sh18:10:402
3566478995243,5cyclictest202865-21sh18:10:402
3566477995245,3cyclictest0-21swapper/117:50:351
3566476995042,3cyclictest0-21swapper/017:55:360
3566476994842,4cyclictest203844-21sh18:10:430
3566476994842,4cyclictest203844-21sh18:10:430
3566478994738,6cyclictest4163664-21spawn18:03:572
3566476994434,4cyclictest184154-21sh18:09:560
3566477994336,3cyclictest0-21swapper/117:56:091
3566477994335,5cyclictest3799665-21cron17:40:011
3566476994336,4cyclictest0-21swapper/017:50:330
3566476994332,5cyclictest3571189-21munin-run17:20:010
3566477994235,4cyclictest0-21swapper/117:20:371
3566476994235,4cyclictest3883144-21kworker/u8:1-xprtiod18:30:010
3566478994032,5cyclictest3878224-21execl17:49:562
3566477994032,5cyclictest3571177-21whetstone-doubl17:20:011
3566478993931,5cyclictest3799688-21munin-run17:40:012
3566477993930,6cyclictest3878226-21execl17:50:021
356647699391,35cyclictest3572963-21fstime17:25:380
3566478993829,6cyclictest267136-21latency_hist18:40:022
356647899382,30cyclictest3571441-21execl17:20:392
3566477993831,4cyclictest3882636-21context118:00:411
3566477993826,9cyclictest267083-21ls18:40:011
3566477993728,5cyclictest564-21dbus-daemon17:30:011
3566476993727,7cyclictest3765976-21latency_hist17:35:020
3566476993721,13cyclictest3955131-21spawn18:03:060
356647799359,16cyclictest1168-21mta-sts-daemon18:15:321
356647799359,16cyclictest1168-21mta-sts-daemon18:15:321
3566477993527,5cyclictest3574876-21fschecks_count17:30:271
3566476993528,4cyclictest3799732-21sendmail17:40:010
3566478993425,6cyclictest0-21swapper/217:20:012
356647899341,26cyclictest763-21snmpd18:15:362
356647899341,26cyclictest763-21snmpd18:15:362
3566476993427,5cyclictest267087-21munin-run18:40:010
3566476993422,9cyclictest0-21swapper/017:49:580
3566478993327,3cyclictest0-21swapper/217:28:262
3566478993324,6cyclictest0-21swapper/217:05:302
3566477993325,4cyclictest3561125-21kworker/u8:15-xprtiod17:10:011
3566476993312,14cyclictest12450irq/32-eth018:30:300
3566478993224,5cyclictest3880096-21fstime17:55:262
356647899311,27cyclictest3575286-21pipe17:30:352
3566476993124,5cyclictest12450irq/32-eth017:20:390
3566478993022,5cyclictest2258627-21cups-browsed18:20:352
3566476992918,9cyclictest3569373-21unixbench_singl17:10:440
3566478992818,7cyclictest263340-21missed_timers18:25:302
3566477992821,4cyclictest0-21swapper/118:35:011
3566478992719,5cyclictest265585-21cron18:35:012
3566477992719,5cyclictest2258627-21cups-browsed18:29:021
3566476992721,4cyclictest261087-21cron18:20:000
3566476992721,4cyclictest261087-21cron18:20:000
3566478992620,3cyclictest0-21swapper/217:15:012
3566477992619,4cyclictest3569520-21systemctl17:15:011
3566476992613,7cyclictest12450irq/32-eth017:05:340
3566476992412,9cyclictest2258627-21cups-browsed18:22:580
3566476992318,3cyclictest0-21swapper/017:05:020
3566477992216,3cyclictest0-21swapper/118:20:471
356647799213,13cyclictest3566429-21munin-run17:05:011
356647999191,6cyclictest0-21swapper/318:25:313
356647999182,9cyclictest0-21swapper/318:10:393
356647999182,9cyclictest0-21swapper/318:10:393
356647999175,7cyclictest0-21swapper/317:57:013
3566478991710,4cyclictest3566498-21latency_hist17:05:022
356647999166,5cyclictest0-21swapper/317:45:313
356647999162,9cyclictest0-21swapper/317:40:353
356647999159,4cyclictest0-21swapper/318:08:033
356647999152,8cyclictest0-21swapper/318:02:213
356647999149,3cyclictest0-21swapper/317:35:343
356647999148,4cyclictest0-21swapper/317:26:133
356647999141,7cyclictest0-21swapper/318:30:353
356647999141,7cyclictest0-21swapper/317:15:013
356647999141,6cyclictest0-21swapper/318:15:313
356647999141,6cyclictest0-21swapper/318:15:313
356647999141,5cyclictest0-21swapper/317:15:293
356647999138,3cyclictest0-21swapper/317:50:043
356647999131,5cyclictest0-21swapper/318:35:303
356647999127,3cyclictest0-21swapper/317:30:243
356647999127,3cyclictest0-21swapper/317:20:343
356647999127,3cyclictest0-21swapper/317:05:333
356647999117,2cyclictest0-21swapper/317:05:013
356647999106,3cyclictest0-21swapper/318:20:313
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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