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2026-05-23 - 04:37

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 Sat May 23, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28590662950,4sleep00-21swapper/020:32:300
2772090996050,7cyclictest1704890-21systemd-journal20:31:582
2772086995951,6cyclictest2969327-21apt-key22:25:011
27721552560,3sleep1281rcuc/119:10:011
2772084995644,9cyclictest2953551-21ntpq22:05:570
2772084995549,4cyclictest2762099-21kworker/u8:4+flush-8:020:25:580
2772086995447,5cyclictest2807906-21kworker/u8:2+events_unbound22:10:581
2772086995443,8cyclictest2938778-21ntpq21:51:001
29467922530,2sleep375-21kworker/3:1+events22:00:533
2772086995348,3cyclictest2969245-21kworker/u8:0+events_unbound23:00:471
2772084995346,5cyclictest2798462-21kworker/u8:1+flush-8:019:35:480
2772084995342,8cyclictest2776081-21ntpq19:10:570
2772086995248,3cyclictest3029893-21kworker/u8:0+flush-8:000:06:011
2772086995246,4cyclictest2807906-21kworker/u8:2+events_unbound22:15:581
2772086995245,4cyclictest3064510-21kworker/u8:4+flush-8:000:00:441
2772086995145,5cyclictest3029893-21kworker/u8:0+events_unbound00:15:011
2772086995143,5cyclictest1704890-21systemd-journal20:32:231
2772086995141,8cyclictest2847252-21ntpq20:20:571
2772084995143,6cyclictest2807692-21ntpq19:40:550
2772086995045,4cyclictest2771923-21kworker/u8:0+flush-8:019:21:041
2772086995043,6cyclictest2899006-21kworker/u8:3+flush-8:021:35:531
2772086995040,7cyclictest2838520-21/usr/sbin/munin20:15:561
2772084995044,4cyclictest2828369-21kworker/u8:0+flush-8:020:46:010
2772090994842,4cyclictest2807906-21kworker/u8:2+flush-8:020:50:482
2772086994843,4cyclictest2899006-21kworker/u8:3+flush-8:021:15:481
2772084994840,7cyclictest3064510-21kworker/u8:4+flush-8:000:00:500
2772086994742,3cyclictest2807906-21kworker/u8:2+events_unbound22:50:581
2772086994741,4cyclictest2798462-21kworker/u8:1+flush-8:019:40:541
2772084994743,3cyclictest2807906-21kworker/u8:2+events_unbound22:33:580
29965892460,5chrt0-21swapper/222:50:512
2772086994636,8cyclictest2973573-21ntpq22:25:581
2772086994636,8cyclictest2908614-21ntpq21:20:581
2772086994636,8cyclictest2868526-21ntpq20:40:531
2772086994541,3cyclictest2969245-21kworker/u8:0+flush-8:022:45:471
2772086994539,4cyclictest2667740-21kworker/u8:2+flush-8:019:10:491
2772086994538,5cyclictest3015142-21apt-get23:10:441
2772086994535,8cyclictest2948694-21ntpq22:00:571
2772086994440,3cyclictest3029893-21kworker/u8:0+flush-8:023:25:491
2772086994439,4cyclictest3029893-21kworker/u8:0+flush-8:023:40:461
2772086994438,4cyclictest2667740-21kworker/u8:2+flush-8:019:15:491
2772086994436,6cyclictest3084507-21apt-get00:20:431
2772086994435,7cyclictest2984927-21/usr/sbin/munin22:40:561
2772086994435,7cyclictest2802773-21ntpq19:35:581
2772084994435,7cyclictest1704890-21systemd-journal20:05:000
2772084994435,7cyclictest1704890-21systemd-journal20:05:000
2772086994338,4cyclictest2828369-21kworker/u8:0+flush-8:021:11:011
2772086994338,4cyclictest2762099-21kworker/u8:4+flush-8:020:05:481
2772086994338,3cyclictest3069521-21kworker/u8:1+events_unbound00:35:001
2772086994335,6cyclictest2762099-21kworker/u8:4+flush-8:020:00:571
2772086994335,6cyclictest2762099-21kworker/u8:4+flush-8:020:00:571
2772086994333,8cyclictest2918695-21ntpq21:30:561
2772084994339,3cyclictest2807906-21kworker/u8:2+flush-8:020:40:590
2772084994338,4cyclictest2828369-21kworker/u8:0+events_unbound20:56:170
2772084994333,7cyclictest1704890-21systemd-journal21:05:000
2772084994332,8cyclictest1704890-21systemd-journal19:20:010
2772086994236,4cyclictest2969245-21kworker/u8:0+flush-8:022:30:591
2772086994235,5cyclictest1704890-21systemd-journal22:06:581
2772084994237,4cyclictest2807906-21kworker/u8:2+flush-8:019:55:470
2772084994237,4cyclictest2762099-21kworker/u8:4+flush-8:019:31:030
2772084994237,3cyclictest2979362-21kworker/u8:1+flush-8:022:35:530
2772084994237,3cyclictest2807906-21kworker/u8:2+events_unbound20:50:450
2772084994233,6cyclictest2793724-21latency_hist19:30:010
2772086994136,4cyclictest2807906-21kworker/u8:2+flush-8:023:55:501
2772086994135,4cyclictest3029893-21kworker/u8:0+flush-8:000:35:541
2772086994135,4cyclictest2807906-21kworker/u8:2+flush-8:021:00:561
2772084994135,5cyclictest2807906-21kworker/u8:2+flush-8:020:10:580
2772084994134,5cyclictest2807906-21kworker/u8:2+flush-8:023:51:000
2772090994030,7cyclictest2909888-21cat21:25:012
2772086994032,6cyclictest1704890-21systemd-journal20:59:591
2772084994036,3cyclictest2969245-21kworker/u8:0+events_unbound22:40:060
2772086993933,4cyclictest3029893-21kworker/u8:0+flush-8:023:30:471
2772086993933,3cyclictest2807906-21kworker/u8:2+flush-8:019:45:531
2772086993932,6cyclictest2807906-21kworker/u8:2+flush-8:023:21:011
2772086993932,5cyclictest2869710-21/usr/sbin/munin20:45:551
2772086993931,6cyclictest3029893-21kworker/u8:0+flush-8:023:46:021
2772084993934,4cyclictest2899006-21kworker/u8:3+flush-8:022:26:020
2772084993933,4cyclictest2807906-21kworker/u8:2+events_unbound21:26:020
2772084993834,3cyclictest2807906-21kworker/u8:2+flush-8:021:45:580
2772084993833,4cyclictest2807906-21kworker/u8:2+flush-8:021:20:490
2772084993829,6cyclictest2848155-21latency_hist20:25:000
2772084993828,8cyclictest2963445-21ntpq22:15:570
2772086993733,3cyclictest2762099-21kworker/u8:4+flush-8:020:27:091
2772086993730,5cyclictest2762099-21kworker/u8:4+events_unbound19:55:561
2772086993728,7cyclictest2979749-21apt-get22:35:451
2772084993731,4cyclictest2828369-21kworker/u8:0+flush-8:020:16:000
2772084993731,4cyclictest2807906-21kworker/u8:2+flush-8:021:55:480
2772084993730,5cyclictest2894936-21diskstats21:10:470
2772084993730,5cyclictest2828369-21kworker/u8:0+events_unbound20:35:570
2772084993630,5cyclictest2899006-21kworker/u8:3+flush-8:021:41:090
2772084993628,6cyclictest3044786-21/usr/sbin/munin23:40:530
2772084993628,6cyclictest3029893-21kworker/u8:0+flush-8:000:11:000
2772084993627,7cyclictest1704890-21systemd-journal21:54:370
2772086993530,3cyclictest3024707-21idleruntime-cro23:19:591
2772086993530,3cyclictest2807906-21kworker/u8:2+flush-8:023:50:561
2772086993529,4cyclictest3069521-21kworker/u8:1+flush-8:000:25:521
2772084993531,3cyclictest2813552-21cat19:50:000
2772084993530,4cyclictest3029893-21kworker/u8:0+flush-8:000:05:490
2772086993429,4cyclictest2762099-21kworker/u8:4+flush-8:019:51:111
2772086993429,3cyclictest2899006-21kworker/u8:3+events_unbound21:50:001
2772084993429,4cyclictest3029893-21kworker/u8:0+flush-8:023:49:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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