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2026-06-03 - 03:33

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 Wed Jun 03, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5105362700,3sleep375-21kworker/3:1+events20:25:453
443478995949,7cyclictest482072-21latency_hist20:00:010
443478995949,7cyclictest482072-21latency_hist20:00:000
6645372580,1sleep2664541-21tr23:00:462
6030342580,4sleep375-21kworker/3:1-events22:00:443
443478995528,8cyclictest615254-21ntpq22:10:470
443478995344,7cyclictest1704890-21systemd-journal22:05:010
443478995041,7cyclictest606537-21/usr/sbin/munin22:05:470
443483994939,8cyclictest541598-21/usr/sbin/munin21:00:511
443483994831,14cyclictest616702-21diskstats22:15:381
443483994733,13cyclictest401-21dbus-daemon22:45:001
443483994727,17cyclictest1704890-21systemd-journal00:22:551
443483994636,8cyclictest1704890-21systemd-journal23:25:001
443478994537,6cyclictest461089-21kworker/u8:1+flush-8:021:05:520
443483994326,14cyclictest461437-21latency_hist19:35:011
443478994338,4cyclictest461089-21kworker/u8:1+events_unbound19:50:540
443483994225,15cyclictest705732-21aten2_r5power_e23:45:371
443483994222,18cyclictest438446-21kworker/u8:2+flush-8:022:00:001
443483994124,15cyclictest578337-21kthreadcore21:35:591
443485994035,4cyclictest433375-21kworker/u8:1+flush-8:019:10:522
443483994028,9cyclictest1704890-21systemd-journal23:16:551
443483994021,17cyclictest651824-21irqrtprio22:50:431
443483994021,17cyclictest595745-21unixbench_singl21:50:551
443478994033,5cyclictest1704890-21systemd-journal21:37:460
6405582390,6sleep3451irq_work/322:35:543
443483993922,15cyclictest729699-21unixbench_multi00:05:591
443483993921,6cyclictest551476-21apt-get21:10:351
443483993920,7cyclictest556387-21/usr/sbin/munin21:15:471
443483993920,17cyclictest616161-21latency_hist22:15:011
443483993920,17cyclictest496883-21cron20:15:011
443483993917,20cyclictest631355-21aten2_r5power_c22:30:351
443478993933,4cyclictest596121-21kworker/u8:3+flush-8:000:35:570
443478993911,22cyclictest621157-21kworker/0:0+events23:50:350
443483993830,6cyclictest575853-21latency_hist21:35:021
443483993828,8cyclictest715769-21diskstats23:55:401
443483993820,2cyclictest0-21swapper/119:50:021
443483993818,3cyclictest0-21swapper/122:27:561
443483993818,2cyclictest0-21swapper/123:50:451
443478993831,5cyclictest735068-21latency_hist00:15:010
443478993830,6cyclictest631036-21latency_hist22:30:010
443483993729,6cyclictest601370-21apt-get22:00:341
443483993720,2cyclictest0-21swapper/119:30:001
443483993628,6cyclictest1704890-21systemd-journal23:11:551
443483993619,2cyclictest0-21swapper/123:38:121
443483993619,2cyclictest0-21swapper/121:25:551
443483993618,3cyclictest0-21swapper/119:15:371
443483993618,2cyclictest591224-21latency_hist21:50:011
443483993617,4cyclictest640578-21unixbench_singl22:35:551
443483993616,4cyclictest610814-21unixbench_multi22:05:571
443483993615,6cyclictest690188-21grep23:25:561
443483993614,7cyclictest505869-21ntpq20:20:491
44347899362,33cyclictest621157-21kworker/0:0+events23:09:390
443485993529,4cyclictest590937-21apt-get21:50:012
443483993529,4cyclictest661225-21apt-get23:00:351
443483993521,12cyclictest448008-21unixbench_singl19:10:571
443478993511,22cyclictest521605-21kworker/0:2+events21:15:370
443485993425,7cyclictest1704890-21systemd-journal19:29:592
443483993427,5cyclictest666159-21apt-get23:05:351
443483993420,12cyclictest650457-21unixbench_singl22:45:541
443483993419,2cyclictest481114-21needreboot19:55:451
443483993419,2cyclictest481114-21needreboot19:55:451
443483993411,9cyclictest758897-21ntpq00:35:491
443478993427,5cyclictest540965-21grep20:55:550
443478993427,5cyclictest1704890-21systemd-journal19:47:240
443478993423,9cyclictest753944-21ntpq00:30:480
443478993423,9cyclictest753944-21ntpq00:30:480
44347899342,27cyclictest460849-21kworker/0:0+events19:30:010
443483993324,6cyclictest551183-21latency_hist21:10:001
443478993326,5cyclictest565104-21ntpq21:20:480
443478993323,8cyclictest461973-21diskstats19:35:350
443478993323,8cyclictest461973-21diskstats19:35:340
4631502320,3sleep10-21swapper/119:35:391
4631502320,3sleep10-21swapper/119:35:391
443485993226,4cyclictest625767-21kworker/u8:1+events_unbound22:35:412
443483993226,4cyclictest482382-21apt-get20:00:351
443483993216,2cyclictest0-21swapper/120:30:481
443483993212,7cyclictest467037-21latency_hist19:45:011
443483993211,7cyclictest730404-21apt-get00:10:411
44347899329,21cyclictest521605-21kworker/0:2+events20:54:590
443478993227,3cyclictest674889-21kworker/u8:0+flush-8:023:19:250
44347899321,29cyclictest621157-21kworker/0:0+events23:25:530
443485993124,5cyclictest1704890-21systemd-journal21:04:552
443485993120,8cyclictest1704890-21systemd-journal19:40:002
443485993120,8cyclictest1704890-21systemd-journal19:39:592
44347899319,16cyclictest621157-21kworker/0:0+events23:40:350
443478993127,2cyclictest527099-21fschecks_count20:45:400
443478993121,7cyclictest724228-21ntpq00:00:480
443478993117,10cyclictest585768-21latency_hist21:45:010
4951842300,2sleep3481ktimers/320:10:493
443485993025,3cyclictest487407-21aten2_r5power_v20:05:372
443483993026,3cyclictest511708-21cron20:30:001
443483993025,3cyclictest754453-21unixbench_multi00:30:551
443483993025,3cyclictest754453-21unixbench_multi00:30:551
443478993025,4cyclictest407111-21kworker/u8:3+flush-8:019:30:430
443478993024,4cyclictest461089-21kworker/u8:1+flush-8:020:00:530
44347899302,26cyclictest621157-21kworker/0:0+events23:10:490
44347899302,26cyclictest621157-21kworker/0:0+events22:30:510
443478993021,7cyclictest656521-21diskstats22:55:390
44347899301,27cyclictest621157-21kworker/0:0+events23:35:390
4432332304,9sleep10-21swapper/119:09:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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