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2026-08-09 - 22:01

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 Sun Aug 09, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
80958999219201,16cyclictest0-21swapper/011:48:050
80959399149144,3cyclictest1084824-21/usr/sbin/munin11:48:051
80959699144140,2cyclictest1088956-21sshd11:48:052
8766442710,2sleep0201rcuc/008:17:470
809589994335,6cyclictest950415-21cp09:30:000
809596994236,4cyclictest860818-21kworker/u8:0+flush-8:008:18:052
809593994235,5cyclictest1044489-21latency_hist11:05:001
809589994231,9cyclictest1058589-21ntpq11:17:580
809593993923,12cyclictest275-21systemd-journal09:23:001
809589993935,3cyclictest761494-21kworker/u8:0+flush-8:007:27:490
809589993934,4cyclictest1089607-21kworker/u8:3+flush-8:012:03:010
809589993929,8cyclictest813729-21ntpq07:12:580
809593993827,8cyclictest275-21systemd-journal11:29:051
809589993833,3cyclictest905855-21latency_hist08:45:010
809593993730,5cyclictest275-21systemd-journal11:06:051
809593993724,10cyclictest275-21systemd-journal09:42:591
809589993733,3cyclictest959777-21kworker/u8:0+flush-8:011:27:490
809589993732,4cyclictest761494-21kworker/u8:0+flush-8:007:22:500
809589993732,4cyclictest761494-21kworker/u8:0+flush-8:007:22:500
809589993732,4cyclictest1074274-21kworker/u8:1+flush-8:011:37:500
809589993532,2cyclictest908898-21kworker/u8:1+events_unbound09:00:000
809589993528,5cyclictest900916-21kworker/u8:3+events_unbound09:20:010
809589993522,10cyclictest275-21systemd-journal11:00:000
809596993425,7cyclictest826650-21cat07:25:002
809596993425,7cyclictest826650-21cat07:25:002
809593993426,5cyclictest814431-21latency_hist07:15:001
809589993430,2cyclictest1034623-21turbostat.cron10:55:000
809589993429,3cyclictest1114085-21unin-run12:15:010
80958999340,32cyclictest930626-21munin-run09:10:000
809593993327,4cyclictest866335-21kworker/u8:2+flush-8:008:38:011
809593993326,5cyclictest876175-21latency_hist08:15:011
809593993323,8cyclictest826291-21apt-get07:25:001
809593993323,8cyclictest826291-21apt-get07:25:001
809589993328,4cyclictest885825-21kworker/u8:1+events_unbound08:27:510
80958999331,30cyclictest275-21systemd-journal09:25:000
9461672320,2sleep2371rcuc/209:27:502
809593993229,2cyclictest1064526-21latency_hist11:25:011
809593993228,2cyclictest0-21swapper/112:35:001
809593993227,4cyclictest3663710-21kworker/u8:2+flush-8:007:38:051
809589993227,3cyclictest831449-21kworker/u8:1+flush-8:007:58:050
809593993123,6cyclictest935290-21unixbench_multi09:13:061
809589993127,3cyclictest975600-21kworker/u8:2+events_unbound11:45:000
809589993127,3cyclictest860818-21kworker/u8:0+events_unbound08:22:470
809589993126,4cyclictest1089607-21kworker/u8:3+flush-8:012:27:490
809589993123,6cyclictest995125-21latency_hist10:15:010
809596993022,6cyclictest1000207-21latency_hist10:20:012
809593993026,2cyclictest921880-21irqrtprio09:02:521
809593993026,2cyclictest0-21swapper/110:20:001
809589993026,3cyclictest985230-21turbostat.cron10:05:000
809589993025,3cyclictest975600-21kworker/u8:2+flush-8:011:02:530
809589993024,5cyclictest831449-21kworker/u8:1+events_unbound07:35:010
809596992924,3cyclictest1099830-21aten2_r5power_v12:02:462
809593992925,3cyclictest883766-21kthreadcore08:22:541
809593992924,3cyclictest990848-21tr10:12:481
809593992924,3cyclictest968058-21kthreadcore09:47:571
809593992924,3cyclictest1030658-21irqcore10:52:531
809593992922,5cyclictest860818-21kworker/u8:0+flush-8:008:07:511
809593992921,6cyclictest990157-21latency_hist10:10:011
809593992921,6cyclictest906290-21/usr/sbin/munin08:47:571
809593992920,6cyclictest275-21systemd-journal10:45:001
809589992925,3cyclictest1134067-21kworker/u8:1+flush-8:012:37:540
809589992925,2cyclictest931145-21aten2_r5power_p09:12:480
809589992922,5cyclictest1123936-21latency_hist12:25:010
809589992922,5cyclictest1019782-21latency_hist10:40:010
809589992919,7cyclictest275-21systemd-journal09:45:000
809593992824,2cyclictest1090027-21tr11:52:461
809593992824,2cyclictest1055117-21cpuspeed_turbos11:17:491
809593992823,3cyclictest973013-21kthreadcore09:52:561
809589992823,4cyclictest959777-21kworker/u8:0+events_unbound10:28:000
809589992823,4cyclictest1000084-21kworker/u8:1+flush-8:010:33:070
809589992822,4cyclictest3663710-21kworker/u8:2+events_unbound07:53:030
809589992820,6cyclictest921135-21/usr/sbin/munin09:02:560
809589992820,6cyclictest1064353-21apt-get11:25:010
8092802282,6sleep00-21swapper/007:08:340
809596992723,3cyclictest814228-21unixbench_singl07:13:042
809596992723,2cyclictest841999-21aten2_r5power_v07:42:472
809596992722,3cyclictest976116-21fschecks_time09:57:502
809596992722,3cyclictest1054217-21unixbench_singl11:13:052
809589992723,2cyclictest891719-21cpuspeed_turbos08:32:500
809589992723,2cyclictest891719-21cpuspeed_turbos08:32:490
809589992723,2cyclictest1029688-21systemd-run10:50:000
809589992717,7cyclictest275-21systemd-journal11:30:010
80958999270,25cyclictest799455-21kworker/0:1+events07:44:160
8093482273,5sleep10-21swapper/107:09:281
809596992622,3cyclictest945124-21unixbench_multi09:23:052
809596992622,3cyclictest837202-21fschecks_count07:37:522
809596992619,5cyclictest275-21systemd-journal12:15:002
809593992622,3cyclictest809585-21cyclictest12:12:521
809593992622,2cyclictest1104888-21cpuspeed_turbos12:07:481
809593992622,2cyclictest0-21swapper/112:40:001
809593992619,5cyclictest275-21systemd-journal12:02:051
809593992617,7cyclictest950319-21latency_hist09:30:001
809593992617,7cyclictest890314-21ntpq08:27:581
809593992617,6cyclictest275-21systemd-journal07:55:171
809589992622,2cyclictest0-21swapper/008:55:000
809589992620,4cyclictest1020257-21apt-get10:42:450
9067472250,2sleep3471rcuc/308:47:513
80959699259,4cyclictest0-21swapper/211:23:032
809596992521,3cyclictest995110-21cron10:15:012
809596992521,2cyclictest931352-21fschecks_count09:12:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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