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2026-06-02 - 08:35

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 Tue Jun 02, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
84879321050,2chrt371rcuc/222:55:392
6875902700,3sleep10-21swapper/120:10:441
622185995638,15cyclictest872344-21ntpq23:15:501
622185995636,17cyclictest812938-21ntpq22:15:491
6489692550,2chrt75-21kworker/3:1+events19:30:553
7630762520,3sleep375-21kworker/3:1+events21:25:463
8960462510,2sleep3481ktimers/323:40:453
622185994825,8cyclictest857610-21ntpq23:00:491
622185994640,4cyclictest689740-21kworker/u8:0+flush-8:020:25:001
622185994640,4cyclictest689740-21kworker/u8:0+flush-8:020:24:591
622185994636,8cyclictest842579-21ntpq22:45:491
622183994640,4cyclictest863409-21latency_hist23:10:010
8082942450,1chrt808295-21cat22:10:550
622183994436,6cyclictest709741-21kworker/u8:0+flush-8:020:40:400
622189994336,5cyclictest913042-40logrotate00:00:002
622183994336,5cyclictest709741-21kworker/u8:0+flush-8:021:25:400
622183994332,8cyclictest645000-21diskstats19:30:390
622185994235,5cyclictest753279-21ntpq21:15:481
622183994237,4cyclictest809042-21kworker/u8:2+flush-8:022:35:540
622183994237,4cyclictest809042-21kworker/u8:2+flush-8:022:35:530
622185994132,7cyclictest1704890-21systemd-journal21:05:001
622183994133,6cyclictest798022-21ntpq22:00:480
622183994131,7cyclictest698479-21ntpq20:20:500
622183994131,7cyclictest698479-21ntpq20:20:500
622183994031,6cyclictest848620-21/usr/sbin/munin22:55:510
622183994030,8cyclictest739383-21kworker/u8:2+flush-8:021:35:490
622183993927,9cyclictest713577-21ntpq20:35:500
6237222380,7sleep3471rcuc/319:10:433
622183993828,7cyclictest783048-21ntpq21:45:520
62153723815,13sleep1617256-21/usr/sbin/munin19:05:561
622183993731,3cyclictest3409660-21kworker/u8:2+flush-8:019:15:050
622185993631,3cyclictest1704890-21systemd-journal23:40:521
622183993627,6cyclictest622009-21kworker/u8:3+flush-8:019:20:470
9220842350,3sleep20-21swapper/200:05:492
622183993528,5cyclictest612332-21kworker/u8:1+flush-8:019:45:530
622183993429,3cyclictest738413-21needreboot21:00:490
622183993428,4cyclictest659593-21kworker/u8:3+flush-8:021:05:400
622183993427,4cyclictest838117-21grep22:40:560
622183993427,4cyclictest838117-21grep22:40:560
622185993327,4cyclictest823688-21kworker/u8:3+flush-8:000:00:411
622185993324,7cyclictest942995-21apt-get00:30:361
622185993324,7cyclictest913028-21latency_hist00:00:011
622183993328,3cyclictest729267-21idleruntime-cro20:55:010
622183993326,4cyclictest888626-21apt-get23:35:360
622183993326,4cyclictest878340-21kworker/u8:1+flush-8:000:05:390
622183993322,9cyclictest936847-21ntpq00:20:480
622183993319,10cyclictest1704890-21systemd-journal19:40:500
622185993221,9cyclictest862559-21ntpq23:05:491
622183993225,5cyclictest823688-21kworker/u8:3+events_unbound00:05:010
622183993223,7cyclictest853806-21/usr/sbin/munin23:00:470
622183993223,6cyclictest883378-21latency_hist23:30:010
6666412310,7sleep20-21swapper/219:50:482
622185993127,2cyclictest838475-21cron22:45:001
622185993127,2cyclictest838475-21cron22:45:001
622185993124,5cyclictest679635-21apt-get20:05:361
622183993126,4cyclictest823688-21kworker/u8:3+flush-8:023:30:400
622183993126,3cyclictest659593-21kworker/u8:3+flush-8:021:55:450
622183993125,4cyclictest778902-21cron21:45:000
622183993120,8cyclictest1704890-21systemd-journal22:35:000
622185993024,4cyclictest659593-21kworker/u8:3+flush-8:020:25:561
622185993024,4cyclictest659593-21kworker/u8:3+flush-8:020:25:551
622185993021,7cyclictest1704890-21systemd-journal21:11:501
622185993020,8cyclictest922088-21ntpq00:05:491
622185993018,2cyclictest421rcuog/221:40:041
622183993021,6cyclictest809042-21kworker/u8:2+flush-8:023:45:360
622183993020,8cyclictest689322-21store20:15:000
622189992923,4cyclictest903672-21cpuspeed_turbos23:50:412
622185992925,3cyclictest816229-21kthreadcore22:20:451
622185992925,2cyclictest0-21swapper/123:39:591
622185992922,5cyclictest1704890-21systemd-journal22:02:521
622185992920,7cyclictest628756-21ntpq19:15:031
622183992923,4cyclictest705047-21cpuspeed_turbos20:30:360
622183992920,6cyclictest3409660-21kworker/u8:2+flush-8:020:15:520
622183992920,6cyclictest3409660-21kworker/u8:2+flush-8:020:15:520
622183992918,8cyclictest1704890-21systemd-journal00:18:520
622189992825,2cyclictest678963-21unixbench_singl20:00:562
622189992823,4cyclictest878340-21kworker/u8:1+flush-8:023:25:572
622189992823,3cyclictest828181-21unixbench_multi22:30:572
622185992821,5cyclictest708627-21ntpq20:30:471
622185992821,5cyclictest1704890-21systemd-journal21:29:531
622185992820,6cyclictest878732-21apt-get23:25:351
622183992823,3cyclictest622720-21fschecks_count19:10:390
622183992822,4cyclictest878340-21kworker/u8:1+events_unbound00:15:010
622183992820,6cyclictest912191-21ntpq23:55:510
622183992818,8cyclictest758251-21ntpq21:20:530
622183992818,7cyclictest1704890-21systemd-journal21:20:000
6321732270,5sleep3451irq_work/319:15:463
622189992723,3cyclictest709502-21cron20:34:592
622189992723,2cyclictest888849-21cpuspeed_turbos23:35:392
622189992723,2cyclictest854634-21irqrtprio23:00:432
622189992717,8cyclictest878205-21turbostat.cron23:25:002
62218999271,13cyclictest663618-21ntpq19:45:492
622185992723,2cyclictest952599-21sendmail00:40:001
622185992722,3cyclictest808837-21systemd-run22:15:001
622185992721,5cyclictest754734-21cpuspeed_turbos21:20:421
622185992719,3cyclictest0-21swapper/121:35:401
622183992721,4cyclictest942304-21unixbench_multi00:25:560
622183992721,4cyclictest644656-21apt-key19:30:010
622189992623,2cyclictest934076-21kthreadcore00:20:452
622189992622,2cyclictest942695-21cron00:29:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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