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2026-08-10 - 17:59

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 Mon Aug 10, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
56117223310,2sleep3575-21kworker/3:2+events07:22:523
58629421870,3sleep3575-21kworker/3:2-events07:47:523
74122021780,3sleep3575-21kworker/3:2+events10:22:523
5473489910285,15cyclictest0-21swapper/009:52:550
547353998178,1cyclictest0-21swapper/209:52:542
547350995954,4cyclictest669288-21kworker/u8:1+events_unbound09:43:011
547350994837,8cyclictest275-21systemd-journal10:25:001
547348994841,5cyclictest803060-21latency_hist11:25:010
547348994638,5cyclictest723739-21latency_hist10:05:010
547348994636,8cyclictest683368-21ntpq09:22:580
547348994636,8cyclictest683368-21ntpq09:22:580
6120912440,2chrt0-21swapper/208:12:552
547350994435,6cyclictest275-21systemd-journal09:10:081
547348994435,6cyclictest614147-21latency_hist08:15:010
5937962420,2sleep3471rcuc/307:53:023
547350994238,2cyclictest711655-21cut09:52:541
547350994028,9cyclictest275-21systemd-journal12:23:121
547350993927,9cyclictest275-21systemd-journal09:39:081
547348993833,3cyclictest629425-21latency_hist08:30:010
547348993831,5cyclictest275-21systemd-journal07:52:340
547353993729,6cyclictest639577-21base6408:40:012
547350993729,6cyclictest807323-21kworker/u8:2+events_unbound12:37:481
547350993729,6cyclictest547691-21/usr/sbin/munin07:12:571
6565812360,2sleep3575-21kworker/3:2+mm_percpu_wq08:57:543
547353993628,6cyclictest275-21systemd-journal07:35:002
547348993630,4cyclictest275-21systemd-journal12:00:000
547348993628,6cyclictest510439-21kworker/u8:2+flush-8:007:48:000
5426682363,8sleep10-21swapper/107:06:261
547350993428,4cyclictest663578-21ntpq09:03:001
547350993425,6cyclictest275-21systemd-journal07:28:421
547350993422,9cyclictest275-21systemd-journal10:33:071
547350993422,9cyclictest275-21systemd-journal10:33:071
547353993324,7cyclictest604026-21apt-get08:05:002
547350993328,3cyclictest772870-21unixbench_multi10:53:051
547348993325,6cyclictest807995-21latency_hist11:30:010
7541132320,10sleep0141ktimers/010:37:500
547353993223,6cyclictest728638-21cron10:10:002
547348993225,5cyclictest787975-21unixbench_multi11:08:040
547348993224,6cyclictest808696-21diskstats11:32:470
547353993121,8cyclictest778090-21apt-get11:00:002
547348993127,2cyclictest823323-21latency_hist11:45:000
547348993126,3cyclictest863486-21aten2_r5power_v12:27:470
547348993126,3cyclictest744132-21tr10:27:460
547348993126,3cyclictest0-21swapper/008:10:010
547348993126,2cyclictest568979-21sh07:30:000
547348993123,6cyclictest639160-21latency_hist08:40:010
547348993123,4cyclictest0-21swapper/008:02:590
547348993122,6cyclictest868599-21grep12:32:490
7014132300,2sleep3575-21kworker/3:2+events09:42:523
547353993022,6cyclictest847962-21gpgv12:10:012
547350993024,4cyclictest743682-21kworker/u8:0-ext4-rsv-conversion11:30:001
547350993022,6cyclictest847107-21ntpq12:07:581
547350993021,6cyclictest738502-21latency_hist10:20:011
547348993025,3cyclictest758898-21aten2_r5power_v10:42:460
547348993025,3cyclictest684802-21cpuspeed_turbos09:27:470
547350992925,2cyclictest763283-21cron10:45:001
547350992924,3cyclictest603782-21unixbench_multi08:03:021
547350992923,4cyclictest659435-21systemd-run09:00:011
547350992922,5cyclictest669039-21unixbench_multi09:08:051
547350992922,5cyclictest275-21systemd-journal12:13:121
547348992924,4cyclictest589318-21kworker/u8:3+flush-8:008:18:010
547348992924,3cyclictest778078-21cron11:00:000
547348992917,8cyclictest275-21systemd-journal12:25:000
54734899290,27cyclictest573984-21anacron07:35:000
547353992823,3cyclictest828647-21aten2_r5power_v11:52:462
547350992821,5cyclictest818384-21/usr/sbin/munin11:42:561
547350992821,5cyclictest578664-21grep07:38:031
547348992823,3cyclictest783320-21true11:05:000
547348992823,2cyclictest0-21swapper/007:15:010
547348992817,8cyclictest738499-21idleruntime-cro10:20:000
5426772282,6sleep00-21swapper/007:06:330
547353992723,2cyclictest664120-21unixbench_singl09:03:082
547353992719,6cyclictest675057-21perl09:17:492
547350992723,2cyclictest731264-21kthreadcore10:12:541
547350992723,2cyclictest0-21swapper/111:15:001
54735099270,10cyclictest8573682grep12:18:011
54734899272,24cyclictest0-21swapper/011:38:030
547348992722,3cyclictest654402-21apt-key08:55:010
547348992721,4cyclictest649101-21unixbench_singl08:48:050
547353992622,2cyclictest858549-21aten2_r5power_v12:22:442
547353992622,2cyclictest699572-21aten2_r5power_v09:42:462
547353992622,2cyclictest664902-21aten2_r5power_v09:07:472
547353992621,3cyclictest754028-21cpuspeed_turbos10:37:492
547353992620,4cyclictest629342-21latency_hist08:30:012
547350992623,2cyclictest0-21swapper/108:30:011
547350992622,2cyclictest764464-21irqrtprio10:47:521
547350992619,5cyclictest842248-21ntpq12:02:591
547350992617,7cyclictest275-21systemd-journal11:05:001
547348992622,2cyclictest0-21swapper/012:10:010
547348992621,4cyclictest609203-21kworker/u8:0+events_unbound08:58:050
547348992621,3cyclictest842939-21cron12:05:000
547348992619,4cyclictest708888-21turbostat.cron09:50:000
547348992611,5cyclictest828083-21latency_hist11:50:000
547348992611,5cyclictest828083-21latency_hist11:50:000
54734899261,12cyclictest5767492cut07:37:530
547353992518,6cyclictest865519-21kthreadcore12:27:542
547350992521,3cyclictest693812-21unixbench_multi09:33:031
547350992521,2cyclictest599102-21sendmail08:00:001
547350992521,2cyclictest0-21swapper/108:40:001
547350992520,3cyclictest0-21swapper/107:50:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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