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2026-09-18 - 05:35

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 Fri Sep 18, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21524021210,3sleep10-21swapper/122:44:091
16182750,7chrt0-21swapper/119:09:111
2713995644,9cyclictest278-21systemd-journal20:20:000
2713995244,6cyclictest242769-21latency_hist23:10:010
1266412510,1sleep0126642-21grep21:14:080
2718995039,8cyclictest273038-21latency_hist23:40:011
2713994945,3cyclictest3351787-21kworker/u8:4+flush-8:019:20:010
2713994740,5cyclictest133739-21latency_hist21:20:010
2718994541,2cyclictest168435-21idleruntime-cro21:55:001
2713994534,8cyclictest203800-21/usr/sbin/munin22:34:080
1797062450,6sleep20-21swapper/222:09:082
2718994336,5cyclictest3351787-21kworker/u8:4+flush-8:019:14:031
2713994336,5cyclictest76828-21kworker/u8:2+flush-8:020:49:090
2713994332,8cyclictest262840-21apt-get23:30:010
2713994332,8cyclictest152904-21ntpq21:39:100
2713994236,4cyclictest257804-21kworker/u8:0+flush-8:000:39:020
2718994134,5cyclictest139267-21apt-get21:28:581
2713994135,4cyclictest76828-21kworker/u8:2+flush-8:020:39:150
2713994135,4cyclictest76828-21kworker/u8:2+flush-8:020:39:150
2720994022,16cyclictest278-21systemd-journal21:39:372
2718994033,5cyclictest49899-21apt-get19:58:581
2718994030,7cyclictest25180-21/usr/sbin/munin19:34:111
2718994029,8cyclictest278-21systemd-journal22:30:371
2713994036,3cyclictest187989-21kworker/u8:1+events_unbound23:34:070
2713994031,7cyclictest243572-21diskstats23:14:020
2718993932,5cyclictest113047-21ntpq20:59:111
2713993921,9cyclictest278-21systemd-journal21:52:370
2720993822,13cyclictest54169-21unixbench_singl19:59:182
2718993833,3cyclictest54529-21kworker/u8:1+events_unbound20:29:061
2720993721,14cyclictest292979-21unixbench_singl23:59:212
2718993729,6cyclictest88960-21latency_hist20:35:001
2713993727,7cyclictest144178-21/usr/sbin/munin21:34:090
2720993627,7cyclictest124042-21cat21:10:012
2718993627,6cyclictest278-21systemd-journal19:35:371
2718993626,7cyclictest158548-21latency_hist21:45:001
2718993626,7cyclictest158548-21latency_hist21:45:001
2713993629,4cyclictest257698-21grep23:24:180
2713993625,8cyclictest284032-21diskstats23:54:020
2720993521,12cyclictest248316-21aten2_r5power_c23:19:002
2718993528,5cyclictest278-21systemd-journal00:20:001
2718993526,7cyclictest168965-21/usr/sbin/munin21:59:101
2718993526,7cyclictest159074-21/usr/sbin/munin21:49:181
2718993526,6cyclictest39500-21latency_hist19:45:011
2713993531,3cyclictest4142839-21kworker/u8:0+events_unbound19:44:060
2713993530,3cyclictest2418-21kworker/u8:2+flush-8:020:09:040
2713993525,7cyclictest223004-21latency_hist22:50:000
2713993525,7cyclictest223004-21latency_hist22:50:000
41919672344,9sleep20-21swapper/219:08:402
2720993428,4cyclictest293336-21kworker/u8:1+flush-8:000:22:562
2720993420,12cyclictest253529-21aten2_r5power_e23:24:002
2718993430,3cyclictest287554-21kworker/u8:2+flush-8:000:05:001
2718993424,8cyclictest252665-21latency_hist23:20:011
2713993424,8cyclictest162823-21ntpq21:49:130
2720993322,8cyclictest278-21systemd-journal22:15:002
2720993319,12cyclictest0-21swapper/223:10:002
2718993327,4cyclictest76828-21kworker/u8:2+flush-8:020:54:091
2713993325,6cyclictest323524-21/usr/sbin/munin00:34:180
2713993322,9cyclictest0-21swapper/023:20:000
2713993322,8cyclictest44412-21latency_hist19:50:010
272099323,26cyclictest156031-21cut21:44:072
272099323,26cyclictest156031-21cut21:44:072
2718993229,2cyclictest254395-21kthreadcore23:24:061
2718993228,2cyclictest123643-21systemd-run21:10:011
2713993227,3cyclictest390-21dbus-daemon23:00:000
2713993226,4cyclictest257804-21kworker/u8:0+flush-8:000:20:020
272099313,15cyclictest0-21swapper/221:54:012
2720993121,8cyclictest278-21systemd-journal19:20:002
272099311,23cyclictest94500-21apt-get20:44:002
272099311,23cyclictest268609-21apt-get23:39:002
272099311,23cyclictest258410-21apt-get23:29:002
2718993125,5cyclictest64186-21kworker/u8:3+flush-8:020:44:041
2713993126,4cyclictest3351787-21kworker/u8:4+events_unbound19:59:150
2713993126,3cyclictest237858-21systemd-run23:05:010
2713993125,3cyclictest118657-21cron21:05:000
2713993122,7cyclictest173376-21latency_hist22:00:010
2713993117,10cyclictest123600-21apt-get21:10:010
898682300,6sleep1281rcuc/120:39:021
898682300,6sleep1281rcuc/120:39:021
272099304,22cyclictest15349-21cut19:24:042
2720993022,6cyclictest278-21systemd-journal23:35:002
2720993016,12cyclictest0-21swapper/219:45:012
272099301,25cyclictest203823-21/usr/sbin/munin22:33:562
272099300,27cyclictest192346-21/usr/sbin/munin22:19:092
272099300,26cyclictest40098-21/usr/sbin/munin19:49:002
272099300,25cyclictest294193-21ps00:04:072
2718993024,4cyclictest148632-21latency_hist21:35:001
2718993023,5cyclictest2418-21kworker/u8:2+flush-8:020:04:151
2718993021,7cyclictest278-21systemd-journal22:54:591
2713993026,3cyclictest187989-21kworker/u8:1+events_unbound22:54:140
2713993025,4cyclictest76828-21kworker/u8:2+flush-8:022:21:580
2713993021,6cyclictest113714-21latency_hist21:00:010
2713993020,7cyclictest134282-21/usr/sbin/munin21:24:170
2720992924,3cyclictest322835-21unixbench_multi00:29:212
272099291,25cyclictest162958-21/usr/sbin/munin21:49:172
272099291,23cyclictest193948-21taskset22:24:012
272099291,23cyclictest134307-21apt-get21:23:592
272099291,22cyclictest283782-21apt-get23:53:592
272099290,25cyclictest228584-21/usr/sbin/munin22:59:022
272099290,17cyclictest78604-21/usr/sbin/munin20:24:162
2718992925,3cyclictest3351787-21kworker/u8:4+flush-8:019:24:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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