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2026-07-21 - 22:54

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 Jul 21, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
209543599227214,11cyclictest2350130-21apt-get11:25:022
226961321740,3sleep3577-21kworker/3:2+mm_percpu_wq10:02:523
209542599150132,16cyclictest0-21swapper/011:25:020
24087092910,2chrt0-21swapper/212:22:502
22163362880,3chrt451irq_work/309:10:003
23058492680,4sleep10-21swapper/110:40:011
2095429996561,3cyclictest0-21swapper/111:25:021
23643182630,1sleep02364319-21needreboot11:37:500
23643182630,1sleep02364319-21needreboot11:37:500
22876952510,4sleep0201rcuc/010:22:470
2095425995141,7cyclictest278-21systemd-journal12:20:010
2095429994932,15cyclictest278-21systemd-journal09:23:441
2095425994942,5cyclictest2251073-21latency_hist09:45:010
2095429994829,3cyclictest2415845-21irqcore12:32:461
2095435994740,5cyclictest278-21systemd-journal08:40:002
2095425994330,3cyclictest2117654-21kworker/u8:2+flush-8:008:12:580
2095425994231,8cyclictest2375052-21true11:50:010
209078324228,9sleep10-21swapper/107:07:191
2095435994134,5cyclictest2100418-21gpgv07:15:012
209542599401,36cyclictest1-21systemd07:40:000
2095429993829,7cyclictest2191947-21/usr/sbin/munin08:47:571
2095425993826,9cyclictest278-21systemd-journal07:45:000
20917252382,7sleep30-21swapper/307:07:493
2095435993730,5cyclictest278-21systemd-journal08:10:012
2095435993730,5cyclictest278-21systemd-journal08:10:002
2095429993728,7cyclictest2132241-21latency_hist07:45:011
2095425993728,7cyclictest2107820-21/usr/sbin/munin07:22:570
2095425993727,8cyclictest2399772-21apt-get12:15:000
2095429993627,7cyclictest2414862-21latency_hist12:30:011
2095425993630,4cyclictest2117654-21kworker/u8:2+flush-8:009:47:430
2095425993630,4cyclictest2095299-21kworker/u8:3+flush-8:008:42:570
2095435993522,10cyclictest278-21systemd-journal10:47:452
2095429993522,10cyclictest278-21systemd-journal11:10:011
2095425993530,4cyclictest2095299-21kworker/u8:3+flush-8:009:57:570
2095425993530,4cyclictest2095299-21kworker/u8:3+flush-8:009:32:440
2095425993527,6cyclictest2266531-21/usr/sbin/munin10:02:580
2095425993428,4cyclictest2226243-21apt-key09:20:000
2095425993428,4cyclictest2226243-21apt-key09:20:000
2095429993324,7cyclictest2191564-21cat08:45:011
2095425993326,5cyclictest2117654-21kworker/u8:2+events_unbound09:12:550
2095429993223,7cyclictest2286312-21/usr/sbin/munin10:22:571
2095429993222,8cyclictest2345483-21apt-get11:21:381
2095429993222,7cyclictest278-21systemd-journal07:40:011
2095435993127,2cyclictest2424718-21cron12:40:002
2095429993126,3cyclictest2186583-21cron08:40:001
2095429993123,6cyclictest2325835-21apt-get11:02:371
2095425993123,6cyclictest2196476-21latency_hist08:50:010
2095425993121,7cyclictest2280927-21latency_hist10:15:010
2095425993120,8cyclictest2142804-21diskstats07:57:400
2095429993025,3cyclictest2283544-21kthreadcore10:17:481
2095429993024,4cyclictest2315969-21apt-get10:52:361
2095429993023,5cyclictest2320903-21apt-get10:57:371
2095429993022,6cyclictest2241156-21latency_hist09:35:011
2095429993019,8cyclictest278-21systemd-journal08:32:451
2095425993024,4cyclictest2117654-21kworker/u8:2+events_unbound09:52:410
2095425993024,4cyclictest2095299-21kworker/u8:3+events_unbound11:45:000
209542599301,24cyclictest2127293-21kworker/0:1+events09:26:270
209543599296,8cyclictest2246606-21cut09:42:382
209543599291,16cyclictest0-21swapper/208:48:292
2095429992926,2cyclictest2266096-21sendmail10:00:001
2095429992924,3cyclictest2384918-21turbostat.cron12:00:001
2095429992924,3cyclictest2280203-21ntpq10:12:521
2095429992924,3cyclictest2166835-21systemctl08:20:001
2095429992921,6cyclictest278-21systemd-journal10:50:011
2095425992925,3cyclictest2058669-21kworker/u8:1+events_unbound07:32:450
2095425992920,6cyclictest2216240-21latency_hist09:10:000
2095425992919,8cyclictest2210551-21ntpq09:02:520
2095425992918,9cyclictest2294994-21ntpq10:27:490
209542599291,24cyclictest2127293-21kworker/0:1+events07:50:350
2095435992824,2cyclictest2305417-21unixbench_singl10:37:582
2095435992821,5cyclictest278-21systemd-journal12:17:432
2095429992824,2cyclictest0-21swapper/110:30:001
2095429992823,3cyclictest2386119-21irqrtprio12:02:481
2095429992822,4cyclictest2250879-21unixbench_singl09:42:571
2095429992818,8cyclictest2099567-21ntpq07:12:521
2095429992816,10cyclictest2157634-21diskstats08:12:451
2095425992824,2cyclictest0-21swapper/007:15:000
209542599282,25cyclictest2127293-21kworker/0:1+events08:59:350
2095425992820,6cyclictest2325810-21/usr/sbin/munin11:02:540
2095425992820,5cyclictest2409951-21latency_hist12:25:010
209542599281,26cyclictest2127293-21kworker/0:1+events10:31:150
20946172282,9sleep02094664-21ps07:07:580
2095435992723,2cyclictest2191268-21unixbench_multi08:43:002
2095435992722,3cyclictest0-21swapper/209:05:002
2095435992721,4cyclictest2113029-21cpuspeed_turbos07:27:422
2095429992722,4cyclictest2058669-21kworker/u8:1+flush-8:007:22:511
209542599276,20cyclictest2127293-21kworker/0:1+events12:06:350
209542599276,20cyclictest2127293-21kworker/0:1+events08:18:400
2095425992723,3cyclictest2117654-21kworker/u8:2+flush-8:008:52:440
209542599272,24cyclictest2127293-21kworker/0:1+events12:33:240
209542599272,24cyclictest2127293-21kworker/0:1+events11:53:230
2095425992721,4cyclictest2305381-21unixbench_multi10:37:580
2095425992721,1cyclictest0-21swapper/011:22:580
2095425992719,6cyclictest2315297-21grep10:47:580
209542599271,25cyclictest2127293-21kworker/0:1+events10:17:150
209542599271,25cyclictest2127293-21kworker/0:1+events09:37:030
209543599268,6cyclictest0-21swapper/210:30:002
209543599264,12cyclictest2177583-21awk08:32:452
2095429992622,3cyclictest2133280-21irqcore07:47:461
2095429992621,3cyclictest0-21swapper/111:35:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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