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2026-08-25 - 18:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Tue Aug 25, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
72430021860,5sleep30-21swapper/310:12:453
65942521810,3sleep30-21swapper/309:07:443
54855121590,3sleep3575-21kworker/3:2+events07:17:483
6445652610,3sleep3575-21kworker/3:2-events08:52:433
8157732600,2sleep0201rcuc/011:47:410
539513996054,4cyclictest534482-21kworker/u8:0+events_unbound07:15:021
539513995550,4cyclictest824756-21kworker/u8:3+events_unbound12:22:521
539513995448,4cyclictest590866-21kworker/u8:2+flush-8:008:57:511
539508995342,8cyclictest859458-21latency_hist12:30:000
539513995246,4cyclictest621193-21kworker/u8:3+events_unbound09:30:011
8224462510,3sleep3575-21kworker/3:2+events11:52:423
539513995145,4cyclictest804955-21kworker/u8:0+flush-8:011:37:501
539513995045,3cyclictest705195-21kworker/u8:1+flush-8:010:12:541
539513995044,4cyclictest740252-21kworker/u8:1+events_unbound10:37:391
7739882490,3chrt201rcuc/011:02:500
539513994943,4cyclictest740252-21kworker/u8:1+events_unbound12:32:351
539513994939,7cyclictest275-21systemd-journal08:55:011
539513994841,5cyclictest740252-21kworker/u8:1+flush-8:011:17:531
539513994839,7cyclictest544366-21latency_hist07:15:011
539513994741,4cyclictest730318-21kworker/u8:2+events_unbound10:22:461
539513994741,4cyclictest730318-21kworker/u8:2+events_unbound10:22:461
539508994729,15cyclictest640766-21latency_hist08:50:010
539508994724,19cyclictest789697-21apt-get11:20:010
539513994639,5cyclictest824756-21kworker/u8:3+flush-8:012:02:521
539513994639,5cyclictest740252-21kworker/u8:1+flush-8:010:52:471
539513994639,5cyclictest621193-21kworker/u8:3+events_unbound08:42:451
539513994639,5cyclictest590866-21kworker/u8:2+flush-8:009:02:451
539513994538,5cyclictest784945-21kworker/u8:3+flush-8:011:32:411
539508994527,16cyclictest401-21dbus-daemon07:25:000
539513994439,3cyclictest740252-21kworker/u8:1+events_unbound12:00:011
539513994438,4cyclictest621193-21kworker/u8:3+events_unbound09:10:011
539513994438,4cyclictest590866-21kworker/u8:2+flush-8:008:37:481
539508994423,18cyclictest275-21systemd-journal11:32:500
539513994339,3cyclictest3930081-21kworker/u8:1+flush-8:007:43:501
539513994337,4cyclictest3930081-21kworker/u8:1+events_unbound09:15:011
539513994336,4cyclictest804955-21kworker/u8:0+flush-8:011:52:521
539513994237,4cyclictest590866-21kworker/u8:2+flush-8:009:20:001
539513994235,5cyclictest774636-21kworker/u8:2+flush-8:012:07:371
539513994135,4cyclictest740252-21kworker/u8:1+events_unbound11:47:371
539513994133,6cyclictest810149-21apt-get11:42:321
539513994132,7cyclictest275-21systemd-journal08:31:201
539517994031,7cyclictest695359-21gpgv09:45:002
539517994014,8cyclictest275-21systemd-journal10:20:202
539517994014,8cyclictest275-21systemd-journal10:20:202
539513994036,3cyclictest590866-21kworker/u8:2+flush-8:009:47:391
539513994034,4cyclictest740252-21kworker/u8:1+events_unbound10:47:461
539513994032,5cyclictest570962-21latency_hist07:40:011
539513994031,7cyclictest596017-21latency_hist08:05:001
539508994032,6cyclictest749857-21latency_hist10:40:010
539508994023,15cyclictest715920-21cpuspeed_turbos10:07:360
539508994021,2cyclictest849352-21cron12:20:000
539508994020,2cyclictest0-21swapper/009:57:530
539508994018,6cyclictest591479-21/usr/sbin/munin08:02:510
539508994016,9cyclictest626622-21diskstats08:37:390
5392422403,8sleep10-21swapper/107:08:561
539517993924,13cyclictest544138-21unixbench_singl07:12:532
539517993923,13cyclictest736408-21kthreadcore10:27:382
539513993935,3cyclictest824756-21kworker/u8:3+flush-8:012:12:491
539513993934,3cyclictest705195-21kworker/u8:1+flush-8:010:10:011
539513993934,3cyclictest3930081-21kworker/u8:1+events_unbound09:32:401
539513993933,4cyclictest720402-21kworker/u8:3+flush-8:010:32:371
539513993932,5cyclictest720402-21kworker/u8:3+events_unbound10:27:341
539513993930,6cyclictest275-21systemd-journal10:43:201
539508993932,5cyclictest646171-21apt-get08:57:330
53950899392,35cyclictest0-21swapper/012:37:520
539508993919,2cyclictest0-21swapper/011:25:200
539508993918,3cyclictest0-21swapper/009:32:360
539508993915,8cyclictest575155-21ntpq07:42:450
53950899390,35cyclictest1-21systemd09:12:200
539513993829,7cyclictest275-21systemd-journal07:33:501
539508993831,5cyclictest275-21systemd-journal08:26:260
539508993821,6cyclictest700396-21latency_hist09:50:010
539517993723,12cyclictest854249-21unixbench_multi12:22:532
539517993722,13cyclictest834188-21unixbench_multi12:02:522
539517993722,13cyclictest794635-21unixbench_singl11:22:532
539513993733,3cyclictest720402-21kworker/u8:3+events_unbound10:20:001
539513993732,4cyclictest576161-21kworker/u8:3+events_unbound07:47:551
539513993732,3cyclictest844378-21kworker/u8:0+flush-8:012:17:401
539513993731,5cyclictest3930081-21kworker/u8:1+flush-8:008:12:511
539517993621,13cyclictest705133-21unixbench_singl09:52:522
539517993621,13cyclictest595742-21unixbench_multi08:02:532
539513993630,4cyclictest685336-21kworker/u8:0+flush-8:010:02:461
539508993619,2cyclictest790623-21cpuspeed_turbos11:22:350
539508993618,3cyclictest833931-21mailstats12:02:500
539508993617,17cyclictest736411-21kthreadcore10:27:380
539508993615,3cyclictest0-21swapper/010:57:370
539513993531,3cyclictest590866-21kworker/u8:2+events_unbound09:22:401
539513993529,4cyclictest740252-21kworker/u8:1+events_unbound11:02:421
539513993529,4cyclictest685336-21kworker/u8:0+flush-8:011:12:491
539513993528,5cyclictest621193-21kworker/u8:3+flush-8:008:47:351
539508993523,1cyclictest0-21swapper/012:32:510
539517993423,8cyclictest275-21systemd-journal12:05:202
539513993428,4cyclictest784945-21kworker/u8:3+events_unbound11:22:491
539508993425,7cyclictest596942-21diskstats08:07:350
539513993328,4cyclictest844378-21kworker/u8:0+events_unbound12:30:001
539513993327,4cyclictest685336-21kworker/u8:0+flush-8:010:57:431
539513993327,4cyclictest576161-21kworker/u8:3+flush-8:007:52:521
539513993327,4cyclictest3930081-21kworker/u8:1+flush-8:008:17:411
539513993327,4cyclictest3930081-21kworker/u8:1+flush-8:008:17:411
539508993317,4cyclictest0-21swapper/009:27:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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