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2026-04-08 - 22:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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.

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 rack7slot3s.osadl.org (updated Wed Apr 08, 2026 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1595221670,5sleep21142899cyclictest21:35:022
11426999328,35cyclictest0-21swapper/017:45:540
23242890,2sleep30-21swapper/321:17:563
199722860,2sleep30-21swapper/321:00:493
11426998525,44cyclictest7950irq/56-dwc_otg_18:50:540
22512810,7sleep31142999cyclictest21:56:093
11426998116,55cyclictest24089-21latency_hist17:05:410
182462790,5sleep01142699cyclictest19:02:260
182462790,5sleep01142699cyclictest19:02:260
11426997726,20cyclictest0-21swapper/016:45:530
11426997630,30cyclictest7850irq/56-dwc_otg_21:16:050
11426997622,4cyclictest7850irq/56-dwc_otg_20:50:570
11426997520,40cyclictest0-21swapper/021:20:560
1142699751,28cyclictest27875-21cut17:15:530
77162740,2sleep30-21swapper/319:28:183
11426997419,39cyclictest0-21swapper/020:36:080
1142699732,39cyclictest0-21swapper/021:35:510
1142699731,18cyclictest10436-21rt-features19:31:040
1142699712,21cyclictest16597-21apt-config21:35:410
253852700,2sleep30-21swapper/319:49:033
1142999707,30cyclictest0-21swapper/320:10:523
1142999707,30cyclictest0-21swapper/320:10:523
1142699703,20cyclictest26312-21fschecks_time17:10:560
1142699703,20cyclictest26312-21fschecks_time17:10:560
1142699701,16cyclictest3452-21ssh18:45:560
1142699696,15cyclictest0-21swapper/020:41:350
1142699696,15cyclictest0-21swapper/020:41:350
11426996919,4cyclictest7850irq/56-dwc_otg_17:31:070
11426996916,12cyclictest11299-21taskset20:50:360
1142699691,21cyclictest14862-21sed19:36:060
1142699691,16cyclictest14904-21latency_hist20:15:410
1142699691,16cyclictest14904-21latency_hist20:15:410
252902680,3sleep10-21swapper/119:11:001
11428996821,20cyclictest12154-21kworker/u8:321:54:302
1142699682,7cyclictest25393-21cut21:45:570
11426996813,47cyclictest0-21swapper/017:05:410
11426996813,12cyclictest0-21swapper/020:04:540
1142699681,21cyclictest9105-21ntpq21:26:030
1142699681,17cyclictest10750-21cat17:56:070
11426996715,4cyclictest7750irq/56-dwc_otg19:22:020
11426996715,10cyclictest1576-21ssh19:59:330
1142699671,12cyclictest0-21swapper/022:00:040
99532660,7sleep09955-21idleruntime16:25:570
11428996627,13cyclictest25406-21ssh20:27:292
1142699668,17cyclictest0-21swapper/019:47:350
11426996622,4cyclictest20954-21ssh21:40:530
11426996616,6cyclictest0-21swapper/018:15:500
1142699661,54cyclictest0-21swapper/021:51:470
11426996614,42cyclictest0-21swapper/020:27:420
11426996612,6cyclictest7950irq/56-dwc_otg_19:11:070
1142699661,16cyclictest27164-21/usr/sbin/munin18:35:540
11428996529,20cyclictest10278-21ssh21:27:172
11428996524,15cyclictest16046-21ssh20:16:052
11428996520,26cyclictest11773-21basename20:50:542
1142799654,44cyclictest7750irq/56-dwc_otg21:00:531
11426996517,25cyclictest2855-21fschecks_time17:35:570
1142699651,5cyclictest7950irq/56-dwc_otg_18:05:520
1142699651,14cyclictest7987-21unixbench_singl20:06:080
1142699651,10cyclictest12786-21grep18:01:080
56032640,2sleep10-21swapper/121:21:211
11428996428,22cyclictest26399-21ssh21:07:492
11428996428,21cyclictest30409-21/usr/sbin/munin17:21:042
11426996418,5cyclictest15031-21ssh20:15:510
11426996413,2cyclictest0-21swapper/019:50:580
11428996337,8cyclictest10008-21df_inode17:55:562
11428996324,21cyclictest10908-21/usr/sbin/munin20:10:522
11428996324,21cyclictest10908-21/usr/sbin/munin20:10:522
11428996322,25cyclictest27593-21sensors19:51:052
1142799633,11cyclictest0-21swapper/117:15:501
1142699634,15cyclictest0-21swapper/020:24:430
11426996314,9cyclictest0-21swapper/016:42:160
11426996314,9cyclictest0-21swapper/016:42:160
11426996314,4cyclictest7750irq/56-dwc_otg17:40:570
11426996310,12cyclictest26468-21sh21:07:570
11428996224,13cyclictest12206-21ssh19:33:292
11428996223,25cyclictest12698-21unixbench_multi18:01:072
1142799623,13cyclictest14126-21ssh18:57:571
1142699622,16cyclictest0-21swapper/017:26:470
1142699621,4cyclictest23068-21fschecks_count18:30:570
1142699621,16cyclictest0-21swapper/019:18:160
11426996210,15cyclictest0-21swapper/018:42:230
260062610,1sleep20-21swapper/219:50:072
11428996125,12cyclictest16540-21chrt16:44:412
11428996125,12cyclictest16540-21chrt16:44:412
11427996115,17cyclictest221ktimersoftd/119:50:531
1142699619,44cyclictest0-21swapper/020:30:580
1142699615,13cyclictest0-21swapper/020:57:540
11426996128,4cyclictest0-21swapper/019:40:520
11426996128,4cyclictest0-21swapper/019:40:520
11426996120,4cyclictest7850irq/56-dwc_otg_18:25:500
11426996113,11cyclictest0-21swapper/018:59:460
1142699611,19cyclictest0-21swapper/021:05:070
1142699611,12cyclictest0-21swapper/016:51:000
11428996030,11cyclictest14648-21/usr/sbin/munin19:36:032
11428996028,12cyclictest6070-21ssh20:05:082
11428996027,25cyclictest27967-21ssh21:49:012
1142699601,5cyclictest7750irq/56-dwc_otg19:30:290
11428995930,11cyclictest32140-21ssh19:56:092
11428995929,12cyclictest727-21ssh20:36:322
11428995929,11cyclictest21561-21/usr/sbin/munin18:26:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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