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2026-07-29 - 01:36

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 28, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
386998599209196,11cyclictest4109425-21ntpq11:08:042
386997599202183,17cyclictest0-21swapper/011:08:050
41037152810,3chrt583-21kworker/3:2-events11:02:593
40584332630,1sleep14058439-21kthreadcore10:17:591
3869983996257,3cyclictest0-21swapper/111:08:041
41117142590,5chrt0-21swapper/011:12:590
3869983995445,6cyclictest3985856-21kworker/u8:1+flush-8:009:43:051
3869983995348,3cyclictest4075465-21kworker/u8:2+events_unbound12:00:001
3869983995144,4cyclictest3951497-21kworker/u8:3+events_unbound09:28:091
3869983994841,5cyclictest3828544-21kworker/u8:2+events_unbound07:18:081
3869983994839,6cyclictest3891600-21latency_hist07:30:001
3869983994839,6cyclictest3891600-21latency_hist07:30:001
3869983994739,5cyclictest4129883-21latency_hist11:30:011
3869985994436,5cyclictest278-21systemd-journal08:40:002
3869983994337,4cyclictest4169717-21kworker/u8:3+events_unbound12:13:111
3869983994337,3cyclictest3985856-21kworker/u8:1+events_unbound10:07:351
3869975994334,6cyclictest4040617-21latency_hist10:00:010
3869975994334,6cyclictest4014912-21ntpq09:33:020
386997599432,32cyclictest3946348-21kworker/0:0+events08:32:500
3869983994237,3cyclictest4075465-21kworker/u8:2+flush-8:010:47:581
3869983994237,3cyclictest3995962-21kworker/u8:2+flush-8:009:52:541
3869983994232,7cyclictest4179569-21latency_hist12:20:011
3869975994236,4cyclictest3921807-21kworker/u8:2+flush-8:008:08:060
3869975994231,8cyclictest3881087-21ntpq07:18:050
386520924228,9sleep10-21swapper/107:05:421
3869983994136,3cyclictest4010722-21kworker/u8:0+events_unbound09:33:071
3869975994133,6cyclictest4041067-21/usr/sbin/munin10:03:050
3869975994132,6cyclictest278-21systemd-journal11:32:170
3869983994035,3cyclictest3946330-21kworker/u8:0+events_unbound08:57:571
3869983994034,4cyclictest3946330-21kworker/u8:0+events_unbound09:02:561
3869983994033,5cyclictest4100968-21cut11:02:531
3869983994032,6cyclictest3932277-21cut08:12:541
3869983994032,5cyclictest2500684-21kworker/u8:0+events_unbound07:48:031
3869975994033,5cyclictest3985856-21kworker/u8:1+flush-8:009:12:560
3869983993933,4cyclictest4075465-21kworker/u8:2+events_unbound11:18:021
3869983993930,7cyclictest4065356-21kworker/u8:3+flush-8:011:23:071
3869975993930,6cyclictest4090325-21latency_hist10:50:010
3869975993930,6cyclictest3869807-21latency_hist07:10:010
3869983993834,3cyclictest4110097-21kworker/u8:0+flush-8:011:48:091
3869983993830,5cyclictest4060866-21/usr/sbin/munin10:23:041
386997599362,32cyclictest3855178-21kworker/0:1+events07:22:500
386997599361,30cyclictest4085406-21kworker/0:2+events11:41:000
386997599361,28cyclictest3946348-21kworker/0:0+events08:42:500
3869983993530,3cyclictest3946330-21kworker/u8:0+flush-8:008:48:001
3869983993525,8cyclictest3912146-21/usr/sbin/munin07:53:061
386997599352,26cyclictest3855178-21kworker/0:1+events08:27:480
386997599351,32cyclictest3946348-21kworker/0:0+events09:24:240
3869975993511,22cyclictest4020661-21kworker/0:1+events10:43:040
39520852340,2sleep3471rcuc/308:32:543
3869985993426,6cyclictest3906496-21apt-get07:45:002
3869983993428,4cyclictest4110097-21kworker/u8:0+events_unbound11:43:061
3869983993428,4cyclictest3828544-21kworker/u8:2+flush-8:007:32:581
386997599342,30cyclictest3946348-21kworker/0:0+events09:08:060
3869983993328,3cyclictest4164762-21cron12:05:001
3869983993327,4cyclictest4149963-21kworker/u8:1+events_unbound12:38:081
3869983993327,4cyclictest2500684-21kworker/u8:0+flush-8:008:03:051
3869983993327,3cyclictest4065356-21kworker/u8:3+events_unbound10:57:571
3869983993325,6cyclictest3921807-21kworker/u8:2+flush-8:008:28:031
3869983993226,4cyclictest4065356-21kworker/u8:3+events_unbound11:13:071
3869983993226,4cyclictest3828544-21kworker/u8:2+flush-8:007:13:041
3869975993226,4cyclictest3921807-21kworker/u8:2+flush-8:008:12:570
386997599322,28cyclictest4085406-21kworker/0:2+events11:38:040
386997599322,25cyclictest4010739-21kworker/0:2+events09:50:020
3869975993210,20cyclictest4085406-21kworker/0:2+events12:08:100
3869983993126,3cyclictest4149963-21kworker/u8:1+events_unbound12:33:021
386997599313,26cyclictest3855178-21kworker/0:1+events07:38:080
3869975993126,3cyclictest3925748-21needreboot08:03:020
3869975993126,3cyclictest1-21systemd12:29:090
386997599312,28cyclictest4020661-21kworker/0:1+events10:23:020
386997599312,27cyclictest4010739-21kworker/0:2+events09:43:060
386997599311,28cyclictest3855178-21kworker/0:1+events07:57:500
3869985993022,6cyclictest4080204-21apt-get10:40:002
3869983993026,2cyclictest4069513-21needreboot10:28:001
3869983993023,5cyclictest3869849-21kworker/u8:3+events_unbound07:37:531
3869983993023,5cyclictest3828544-21kworker/u8:2+flush-8:007:23:051
3869983993022,6cyclictest4110097-21kworker/u8:0+events_unbound11:52:561
3869983993021,7cyclictest4084619-21ntpq10:43:031
3869983993019,8cyclictest4074480-21ntpq10:33:011
386997599303,26cyclictest4085406-21kworker/0:2+events12:13:060
3869975993025,3cyclictest4075465-21kworker/u8:2+flush-8:011:57:590
386997599302,27cyclictest3946348-21kworker/0:0+events08:52:550
386997599302,26cyclictest4085406-21kworker/0:2+events12:18:040
386997599302,26cyclictest4085406-21kworker/0:2+events11:18:060
386997599302,26cyclictest4085406-21kworker/0:2+events11:03:040
386997599302,26cyclictest4085406-21kworker/0:2+events10:57:500
386997599302,26cyclictest3946348-21kworker/0:0+events08:48:000
386997599302,22cyclictest4020661-21kworker/0:1+events10:30:120
3869985992919,8cyclictest278-21systemd-journal11:48:172
3869983992925,2cyclictest3901408-21kworker/u8:1+events_unbound07:43:011
3869983992924,4cyclictest3951497-21kworker/u8:3+flush-8:009:23:031
3869983992924,4cyclictest3951497-21kworker/u8:3+events_unbound09:08:101
3869983992924,3cyclictest3985856-21kworker/u8:1+events_unbound10:13:001
3869983992924,3cyclictest3985856-21kworker/u8:1+events_unbound10:12:591
3869983992924,3cyclictest3917811-21irqrtprio07:57:581
3869983992923,5cyclictest3985856-21kworker/u8:1+events_unbound09:12:541
3869983992922,5cyclictest3961626-21apt-get08:42:491
3869983992922,5cyclictest3940609-21ntpq08:18:021
3869983992921,6cyclictest3985856-21kworker/u8:1+flush-8:009:38:081
386997599296,22cyclictest4020661-21kworker/0:1+events10:07:540
386997599295,18cyclictest3946348-21kworker/0:0+events09:00:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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