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2026-08-09 - 03:25

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 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32688262940,3chrt0-21swapper/022:57:550
31373302880,2sleep0161rcu_preempt20:47:510
32628902790,3sleep10-21swapper/122:52:551
32628902790,3sleep10-21swapper/122:52:541
31852772680,5sleep30-21swapper/321:33:043
3039556995747,7cyclictest3190822-21latency_hist21:40:000
32724662520,3sleep1281rcuc/123:02:531
32997762510,2chrt451irq_work/323:28:033
3039556994742,3cyclictest3015219-21kworker/u8:4+flush-8:019:18:060
31997952460,3chrt575-21kworker/3:2+events21:47:573
31997952460,3chrt575-21kworker/3:2+events21:47:563
3039560994638,5cyclictest3225804-21latency_hist22:15:011
3039556994639,5cyclictest3289857-21kworker/u8:0+flush-8:000:03:050
3039556994536,6cyclictest3319799-21latency_hist23:50:010
3039556994335,6cyclictest3091201-21kworker/u8:3+flush-8:020:07:520
3039560994237,4cyclictest3044636-21kworker/u8:0+flush-8:019:37:491
3039560994236,5cyclictest3039422-21kworker/u8:2+flush-8:019:12:501
3039560994236,5cyclictest3039422-21kworker/u8:2+flush-8:019:12:501
3039560994236,4cyclictest3116446-21kworker/u8:1+flush-8:021:03:021
3039562994034,4cyclictest3070984-21kworker/u8:2+flush-8:019:42:512
3039556994035,4cyclictest3330187-21kworker/u8:3+flush-8:000:10:300
3039560993929,7cyclictest275-21systemd-journal23:30:011
3039556993934,4cyclictest3335204-21kworker/u8:1+events_unbound00:25:010
3039556993934,3cyclictest3216060-21kworker/u8:2+events_unbound22:35:000
3039556993932,5cyclictest3091201-21kworker/u8:3+flush-8:020:52:510
3039560993826,10cyclictest3354766-21latency_hist00:25:011
3039556993830,6cyclictest3081178-21cp19:50:000
3039556993730,5cyclictest3300483-21tr23:32:460
30399482360,2sleep20-21swapper/219:12:482
30399482360,2sleep20-21swapper/219:12:472
3039562993627,7cyclictest3131119-21cp20:40:012
3039560993629,5cyclictest3116446-21kworker/u8:1+events_unbound21:23:021
3039560993530,3cyclictest3167260-21irqrtprio21:17:531
3039560993526,6cyclictest3076128-21latency_hist19:45:011
3039556993526,7cyclictest3106701-21/usr/sbin/munin20:17:580
3039556993525,8cyclictest3260877-21/usr/sbin/munin22:52:570
3039556993525,8cyclictest3260877-21/usr/sbin/munin22:52:570
3039560993429,3cyclictest3251734-21irqrtprio22:42:541
3039560993424,8cyclictest3101094-21apt-get20:10:001
3039556993429,3cyclictest3091201-21kworker/u8:3+events_unbound21:30:000
3039556993419,13cyclictest275-21systemd-journal22:22:060
3039556993329,2cyclictest3131093-21base6420:40:010
3039556993328,3cyclictest401-21dbus-daemon23:25:000
3039556993326,5cyclictest3225543-21grep22:13:040
3039562993227,4cyclictest3015219-21kworker/u8:4+flush-8:019:15:052
3039560993222,8cyclictest3185179-21ntpq21:33:011
3039556993227,4cyclictest3044636-21kworker/u8:0+flush-8:019:32:520
3039556993128,2cyclictest3320981-21irqrtprio23:52:540
3039556993127,3cyclictest3070984-21kworker/u8:2+flush-8:020:13:060
3039556993126,4cyclictest3335204-21kworker/u8:1+events_unbound00:08:060
3039556993126,3cyclictest3095327-21needreboot20:02:580
3039556993123,6cyclictest0-21swapper/022:42:590
3039556993121,8cyclictest275-21systemd-journal19:25:000
3039556993119,9cyclictest275-21systemd-journal19:30:000
3039560993026,2cyclictest3361129-21irqrtprio00:32:541
3039556993024,4cyclictest3166065-21cron21:15:010
3039562992926,2cyclictest3165825-21unixbench_multi21:13:052
3039562992925,2cyclictest3061011-21unixbench_multi19:28:052
3039560992925,3cyclictest3276479-21irqrtprio23:07:541
3039560992925,3cyclictest3171270-21kworker/u8:2+events_unbound21:43:051
3039560992925,3cyclictest3171270-21kworker/u8:2+events_unbound21:43:051
3039560992924,4cyclictest3240645-21cron22:30:001
3039560992924,4cyclictest3200712-21latency_hist21:50:001
3039560992924,4cyclictest3200712-21latency_hist21:50:001
3039560992924,3cyclictest3151001-21unixbench_singl20:58:051
3039560992923,4cyclictest3146104-21unixbench_singl20:53:061
3039556992923,4cyclictest3070984-21kworker/u8:2+events_unbound19:42:490
3039556992922,5cyclictest3200715-21turbostat.cron21:49:590
3039556992922,5cyclictest3200715-21turbostat.cron21:49:590
3039556992922,5cyclictest3195557-21unixbench_multi21:43:070
3039556992922,5cyclictest3195557-21unixbench_multi21:43:070
3039556992922,5cyclictest3171448-21/usr/sbin/munin21:23:040
3039562992825,2cyclictest3116750-21aten2_r5power_p20:27:482
3039562992825,2cyclictest0-21swapper/222:59:592
3039562992823,4cyclictest3091201-21kworker/u8:3+flush-8:023:18:052
3039560992822,4cyclictest3125870-21unixbench_singl20:33:061
3039560992817,9cyclictest3190190-21ntpq21:38:011
3039556992824,3cyclictest3116212-21idleruntime-cro20:25:000
3039556992824,2cyclictest3349053-21needreboot00:17:570
3039556992824,2cyclictest3146973-21cut20:57:500
3039556992823,3cyclictest3171036-21systemd-run21:20:000
3039562992710,3cyclictest3334947-21idleruntime-cro00:05:002
3039560992723,3cyclictest3049018-21kthreadcore19:17:561
3039560992721,4cyclictest3270134-21unixbench_singl22:58:051
3039560992720,5cyclictest3066217-21latency_hist19:35:011
3039560992720,5cyclictest0-21swapper/119:48:061
3039556992723,2cyclictest3310613-21cpuspeed_turbos23:42:490
3039556992722,2cyclictest0-21swapper/022:40:000
3039556992721,4cyclictest3305668-21cpuspeed_turbos23:37:500
3039556992721,4cyclictest0-21swapper/023:20:010
3039556992720,4cyclictest0-21swapper/000:00:000
3039556992719,6cyclictest0-21swapper/021:52:460
3039562992621,4cyclictest3076358-21kworker/u8:0+flush-8:019:48:082
3039562992620,4cyclictest3324523-21unixbench_multi23:53:072
3039560992621,3cyclictest3058943-21kthreadcore19:27:551
3039560992619,6cyclictest3161612-21aten2_r5power_c21:12:471
3039556992622,2cyclictest0-21swapper/020:45:010
3039556992621,4cyclictest3125343-21ntp_kernel_pll_20:32:590
3039556992621,3cyclictest3219980-21needreboot22:07:570
3039556992620,4cyclictest3160270-21wc21:07:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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