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2026-07-11 - 19:32

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 Sat Jul 11, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
281657199175156,17cyclictest3093147-21latency_hist11:45:000
281657599114111,1cyclictest0-21swapper/111:45:001
2816576998783,2cyclictest3093394-21gpgv11:45:012
2816571995845,10cyclictest1704890-21systemd-journal09:54:050
2816571995746,8cyclictest2863201-21ntpq07:50:190
2816575995545,8cyclictest3077381-21ntpq11:25:161
2816575995140,9cyclictest2962862-21ntpq09:30:191
2816575994838,8cyclictest2997583-21ntpq10:05:161
2816575994738,6cyclictest1704890-21systemd-journal08:25:061
2816571994642,3cyclictest2903038-21kworker/u8:3+events_unbound09:05:070
2816571994641,4cyclictest2838147-21kworker/u8:0+flush-8:007:35:210
2816571994636,8cyclictest3022651-21ntpq10:30:180
2816576994534,8cyclictest2843924-21munin-node07:35:042
2816575994534,8cyclictest2912774-21ntpq08:40:161
2816571994537,5cyclictest2923255-21kworker/u8:0+flush-8:009:20:200
2816571994432,11cyclictest2909229-21kworker/u8:1+flush-8:008:45:070
2816571994431,8cyclictest3047629-21kworker/u8:2+flush-8:011:50:060
2816575994333,8cyclictest3127204-21ntpq12:15:181
2816571994335,5cyclictest2792213-21kworker/u8:3+events_unbound08:00:190
2816571994234,6cyclictest1704890-21systemd-journal10:40:510
2816575994133,6cyclictest1979734-21kworker/u8:1+flush-8:007:25:221
2816571994134,5cyclictest3078527-21/usr/sbin/munin11:30:220
2816571994134,5cyclictest3047629-21kworker/u8:2+flush-8:011:00:090
31250152400,10sleep0141ktimers/012:15:130
2816576994029,8cyclictest1704890-21systemd-journal10:09:592
2816575994030,8cyclictest2938514-21latency_hist09:10:001
2816575994030,8cyclictest2847769-21ntpq07:35:181
2816571994033,5cyclictest3067420-21ntpq11:15:170
2816571994030,7cyclictest2838147-21kworker/u8:0+flush-8:008:10:170
2816571993933,4cyclictest2988825-21kworker/u8:2+events_unbound10:05:170
281657199391,36cyclictest1-21systemd11:30:000
2816576993829,6cyclictest1704890-21systemd-journal10:25:012
2816571993831,5cyclictest3128404-21kworker/u8:3+flush-8:012:25:170
2816571993831,5cyclictest3018589-21latency_hist10:30:020
2816571993827,9cyclictest3128648-21diskstats12:20:080
2816571993826,9cyclictest3007458-21ntpq10:15:170
30803752370,2sleep3471rcuc/311:30:123
2816571993731,4cyclictest1979734-21kworker/u8:1+flush-8:007:15:060
2816571993731,4cyclictest1979734-21kworker/u8:1+flush-8:007:15:060
29054872360,2sleep3481ktimers/308:35:113
2816575993628,6cyclictest2821493-21latency_hist07:15:021
2816575993628,6cyclictest2821493-21latency_hist07:15:011
2816571993630,4cyclictest1979734-21kworker/u8:1+flush-8:007:10:200
2816571993630,4cyclictest1979734-21kworker/u8:1+flush-8:007:10:200
2816576993525,7cyclictest1704890-21systemd-journal12:15:002
2816576993525,7cyclictest1704890-21systemd-journal12:15:002
2816571993529,4cyclictest2864455-21kworker/u8:2+events_unbound08:35:170
2816571993528,5cyclictest2792213-21kworker/u8:3+events_unbound07:55:170
2816576993424,7cyclictest1704890-21systemd-journal12:19:592
2816575993425,7cyclictest1704890-21systemd-journal09:00:001
2816575993423,8cyclictest1704890-21systemd-journal08:14:051
2816571993428,4cyclictest2873177-21kworker/u8:1+flush-8:008:20:160
2816571993427,5cyclictest3047629-21kworker/u8:2+flush-8:012:10:200
2816571993427,5cyclictest3047629-21kworker/u8:2+flush-8:012:10:200
2816571993427,5cyclictest2923255-21kworker/u8:0+flush-8:009:30:200
2816576993326,5cyclictest1704890-21systemd-journal12:40:012
2816575993328,3cyclictest2959023-21latency_hist09:30:011
2816575993324,7cyclictest3078553-21apt-get11:30:021
2816571993324,6cyclictest2873177-21kworker/u8:1+flush-8:008:05:200
2816576993224,5cyclictest1704890-21systemd-journal10:05:002
2816576993224,5cyclictest1704890-21systemd-journal10:04:592
2816575993228,3cyclictest3029681-21kworker/u8:0+events_unbound10:45:131
2816575993227,3cyclictest3008496-21apt-config10:20:011
2816575993223,7cyclictest3058633-21/usr/sbin/munin11:10:161
2816575993223,6cyclictest1704890-21systemd-journal08:23:061
2816575993222,7cyclictest1704890-21systemd-journal09:48:061
2816571993228,3cyclictest3029681-21kworker/u8:0+flush-8:010:50:200
2816571993227,3cyclictest3118179-21kworker/u8:1+flush-8:012:30:060
2816571993226,4cyclictest3017686-21kworker/u8:3+flush-8:010:55:060
2816571993226,4cyclictest1979734-21kworker/u8:1+flush-8:007:25:210
2816571993225,5cyclictest2942707-21kworker/u8:1+events_unbound09:35:170
2816571993225,5cyclictest1704890-21systemd-journal08:25:270
2816571993220,8cyclictest1704890-21systemd-journal11:14:590
31187992310,5sleep3451irq_work/312:10:103
31187992310,5sleep3451irq_work/312:10:103
2816575993122,6cyclictest3068345-21latency_hist11:20:011
2816575993120,9cyclictest1704890-21systemd-journal10:30:011
2816575993119,9cyclictest2853686-21latency_hist07:45:011
2816571993127,2cyclictest2849292-21fschecks_time07:40:090
2816571993126,3cyclictest2909229-21kworker/u8:1+flush-8:008:50:310
2816571993122,6cyclictest1704890-21systemd-journal11:20:150
2816576993024,4cyclictest2858915-21apt-get07:50:012
2816576993023,5cyclictest3048717-21apt-get11:00:042
2816575993025,4cyclictest2854166-21apt-get07:45:051
2816575993025,3cyclictest3109481-21kthreadcore12:00:121
2816575993023,5cyclictest2864455-21kworker/u8:2+flush-8:008:45:161
2816575993022,6cyclictest3118155-21latency_hist12:10:011
2816575993021,7cyclictest2943934-21apt-get09:15:041
2816575993021,6cyclictest2903766-21latency_hist08:35:001
2816571993026,2cyclictest3013176-21unixbench_multi10:20:240
2816571993025,4cyclictest2942707-21kworker/u8:1+events_unbound09:40:230
2816571993025,3cyclictest2958684-21apt-key09:30:010
2816571993024,4cyclictest3047629-21kworker/u8:2+flush-8:012:00:230
2816571993024,4cyclictest3029681-21kworker/u8:0+events_unbound10:45:170
2816571993022,5cyclictest3052573-21kworker/u8:4+events_unbound11:55:170
2816571993021,7cyclictest3027568-21ntpq10:35:160
28155712303,4sleep10-21swapper/107:05:211
2816576992925,2cyclictest2898819-21cron08:30:012
2816575992925,3cyclictest2923255-21kworker/u8:0+flush-8:009:12:111
2816575992925,3cyclictest2908721-21turbostat.cron08:40:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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