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2026-08-25 - 06:32

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 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2790118996861,4cyclictest3063245-21kworker/u8:2+events_unbound00:00:011
30867422650,2sleep3471rcuc/300:15:013
2790115995647,6cyclictest3035650-21latency_hist23:15:000
2790115995647,6cyclictest3035650-21latency_hist23:15:000
2790118995450,2cyclictest2976071-21kworker/u8:2+flush-8:022:42:501
2790115995441,10cyclictest275-21systemd-journal20:10:000
2790115995316,24cyclictest0-21swapper/022:07:350
2790120995245,5cyclictest2871709-21apt-get20:30:002
2790118995243,6cyclictest2941248-21latency_hist21:40:011
2790118995146,4cyclictest2976071-21kworker/u8:2+events_unbound23:12:521
2790118995146,4cyclictest2976071-21kworker/u8:2+events_unbound23:12:521
2790115995131,17cyclictest2866759-21latency_hist20:25:010
2790118994942,5cyclictest2871536-21kworker/u8:3+flush-8:021:07:421
2790118994942,5cyclictest2871536-21kworker/u8:3+flush-8:021:07:421
2790115994928,18cyclictest2985315-21ntpq22:22:500
2790118994843,4cyclictest3063245-21kworker/u8:2+flush-8:000:04:431
2790118994642,3cyclictest2976071-21kworker/u8:2+flush-8:023:00:001
2790118994640,4cyclictest2871536-21kworker/u8:3+flush-8:020:45:311
2790115994627,17cyclictest2791363-21kthreadcore19:12:410
2790118994540,3cyclictest2871536-21kworker/u8:3+flush-8:020:32:431
2790118994539,4cyclictest2911550-21kworker/u8:1+flush-8:023:02:351
28570192440,1sleep12857018-21cat20:15:011
2790118994436,6cyclictest2881857-21latency_hist20:40:011
2790118994337,4cyclictest3030305-21kworker/u8:3+flush-8:023:17:511
2790118994336,5cyclictest3063245-21kworker/u8:2+events_unbound00:17:511
2790118994336,5cyclictest2918006-21kworker/u8:0+flush-8:021:30:311
2790118994236,4cyclictest2871536-21kworker/u8:3+flush-8:020:52:411
2790118994235,5cyclictest3097629-21/usr/sbin/munin00:32:531
2790118994235,5cyclictest1987140-21kworker/u8:4+events_unbound19:42:471
2790118994235,5cyclictest1987140-21kworker/u8:4+events_unbound19:37:441
2790118994136,4cyclictest2797204-21kworker/u8:0+flush-8:019:55:311
2790115994129,9cyclictest275-21systemd-journal00:00:170
2790115994030,7cyclictest2945666-21ntpq21:42:460
2790115994028,10cyclictest3025545-21latency_hist23:05:000
2790115994025,13cyclictest275-21systemd-journal20:19:430
2790120993930,7cyclictest275-21systemd-journal23:35:002
2790118993934,4cyclictest2826492-21kworker/u8:1+flush-8:019:50:311
2790118993932,5cyclictest2918006-21kworker/u8:0+flush-8:000:07:461
2790118993931,6cyclictest2811818-21latency_hist19:30:011
2790115993917,20cyclictest2822419-21diskstats19:42:370
2790118993834,3cyclictest2976071-21kworker/u8:2+events_unbound22:25:001
2790118993832,4cyclictest2918006-21kworker/u8:0+events_unbound23:07:541
2790115993827,8cyclictest275-21systemd-journal23:38:310
2790120993726,8cyclictest2881873-21awk20:40:002
2790118993733,3cyclictest3030305-21kworker/u8:3+flush-8:023:32:531
2790118993729,6cyclictest2797204-21kworker/u8:0+flush-8:020:17:521
2790115993726,8cyclictest275-21systemd-journal22:40:000
279011599372,10cyclictest571-21snmpd21:12:330
2790115993720,15cyclictest2806639-21unixbench_singl19:22:540
2790115993719,15cyclictest0-21swapper/019:15:050
2790120993626,8cyclictest2856727-21cp20:15:012
2790118993632,3cyclictest2871536-21kworker/u8:3+flush-8:020:45:001
2790118993630,4cyclictest2640161-21kworker/u8:2+flush-8:020:07:481
2790118993627,7cyclictest3010059-21ntpq22:47:481
2790118993625,9cyclictest275-21systemd-journal21:13:311
2790115993632,3cyclictest1987140-21kworker/u8:4+flush-8:019:35:010
2790118993530,4cyclictest2871536-21kworker/u8:3+flush-8:020:57:381
2790118993530,3cyclictest2971092-21cron22:10:001
2790118993529,5cyclictest2911550-21kworker/u8:1+flush-8:022:02:521
2790115993526,7cyclictest2980265-21ntpq22:17:450
2790115993526,6cyclictest3054918-21ntpq23:32:450
2790115993524,8cyclictest275-21systemd-journal23:59:000
2790115993520,13cyclictest2842436-21cpuspeed_turbos20:02:380
2790115993517,16cyclictest3046514-21irqcore23:27:390
2790118993429,3cyclictest1987140-21kworker/u8:4+events_unbound19:15:001
2790118993428,4cyclictest3070198-21kworker/u8:1+flush-8:000:37:471
2790118993426,6cyclictest3050478-21latency_hist23:30:011
2790115993428,4cyclictest3090831-21needreboot00:17:460
279011599341,8cyclictest3106203-21memory00:37:450
2790115993418,14cyclictest3098110-21runrttasks00:32:400
2790115993417,15cyclictest2941392-21systemd21:40:010
279011599341,4cyclictest3010245-21python322:47:520
279011599341,31cyclictest1-21systemd19:37:300
279011599341,10cyclictest3011881-21/usr/sbin/munin22:52:400
279011599341,10cyclictest2855901-21ntpq20:12:480
2790118993328,4cyclictest2871536-21kworker/u8:3+events_unbound21:27:381
2790118993328,4cyclictest2797204-21kworker/u8:0+events_unbound20:02:441
2790118993328,3cyclictest2797204-21kworker/u8:0+flush-8:019:22:501
2790118993327,4cyclictest2902078-21apt-get21:02:321
2790118993327,4cyclictest2797204-21kworker/u8:0+flush-8:020:22:461
2790118993326,5cyclictest2918006-21kworker/u8:0+flush-8:023:45:011
2790118993325,6cyclictest2976071-21kworker/u8:2+flush-8:022:52:451
2790118993324,7cyclictest275-21systemd-journal23:47:401
279011599338,8cyclictest3082778-21ps00:12:430
2790115993315,16cyclictest3026758-21sort23:07:420
2790115993315,14cyclictest0-21swapper/023:20:000
279011599330,9cyclictest2925817-21/usr/sbin/munin21:22:530
279011599330,27cyclictest2881901-21kworker/0:1+events21:05:480
279011599330,27cyclictest2881901-21kworker/0:1+events21:05:480
2790118993227,3cyclictest2946430-21apt21:45:001
2790118993226,5cyclictest2918006-21kworker/u8:0+events_unbound22:37:471
2790118993225,5cyclictest2911550-21kworker/u8:1+flush-8:022:32:381
2790118993225,5cyclictest2871709-21apt-get20:30:011
2790118993225,5cyclictest2797204-21kworker/u8:0+events_unbound19:32:511
279011599321,9cyclictest3062010-21/usr/sbin/munin23:42:480
279011599321,8cyclictest2832445-21/usr/sbin/munin19:52:390
2790115993216,15cyclictest0-21swapper/023:55:000
2790115993216,14cyclictest0-21swapper/020:47:450
2790115993215,15cyclictest2811839-21systemd-run19:30:010
2790115993214,16cyclictest2935778-21mailstats21:32:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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