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2026-06-10 - 04:48

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 Wed Jun 10, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
320387122200,2sleep3451irq_work/319:40:023
335340521500,2sleep375-21kworker/3:1+events22:10:383
34521892570,4chrt0-21swapper/123:50:321
34288022530,5chrt13-21ksoftirqd/023:25:390
3172051995235,14cyclictest3297041-21ntpq21:10:441
3172051995141,7cyclictest3471541-21latency_hist00:10:001
3172051994840,6cyclictest3347084-21apt-get22:02:471
3172051994737,8cyclictest3366623-21ntpq22:20:421
3172056994636,7cyclictest1704890-21systemd-journal23:17:482
3172051994637,7cyclictest3182923-21ntpq19:15:411
3172051994637,7cyclictest3182923-21ntpq19:15:401
3172047994540,3cyclictest3139223-21kworker/u8:2+flush-8:019:20:340
317205699441,25cyclictest3398419-21/usr/sbin/munin22:55:362
3172051994323,17cyclictest1704890-21systemd-journal20:33:481
3172047994335,6cyclictest3347555-21/usr/sbin/munin22:05:450
3172051994232,7cyclictest3382362-21apt-get22:40:001
3172051994132,7cyclictest3417407-21/usr/sbin/munin23:15:401
3172051994131,8cyclictest3282162-21ntpq20:55:431
3172047994136,3cyclictest3183862-21kworker/u8:0+flush-8:019:40:490
3172047994135,4cyclictest3435960-21ntpq23:30:410
3172047994123,14cyclictest1704890-21systemd-journal22:00:480
3172051994031,7cyclictest3476757-21/usr/sbin/munin00:15:411
3172051994030,7cyclictest1704890-21systemd-journal22:41:471
3172051994027,9cyclictest1704890-21systemd-journal19:24:461
3172051994025,12cyclictest1704890-21systemd-journal21:45:481
3172047994031,6cyclictest3203632-21latency_hist19:40:020
3172047994029,8cyclictest3139223-21kworker/u8:2+flush-8:020:30:470
3172056993917,19cyclictest1704890-21systemd-journal20:00:462
3172051993933,4cyclictest3297915-21kworker/u8:1+events_unbound00:30:441
3172051993926,11cyclictest3243297-21sh20:20:001
3172051993923,14cyclictest3208843-21/usr/sbin/munin19:45:411
3172047993932,5cyclictest3342301-21latency_hist22:00:000
3172047993931,6cyclictest3247384-21ntpq20:20:400
3172047993930,7cyclictest3391579-21ntpq22:45:420
3172047993930,6cyclictest3183862-21kworker/u8:0+flush-8:020:05:480
3172056993820,16cyclictest0-21swapper/219:15:462
3172056993820,16cyclictest0-21swapper/219:15:462
317205199389,21cyclictest0-21swapper/119:59:481
3172051993831,5cyclictest3129120-21kworker/u8:3+flush-8:022:55:361
3172047993830,7cyclictest3129120-21kworker/u8:3+flush-8:019:50:340
3172047993829,7cyclictest3197762-21ntpq19:30:400
3172056993726,9cyclictest1704890-21systemd-journal20:10:452
3172056993711,21cyclictest3184129-21apt-get19:20:292
3172051993729,6cyclictest3446802-21latency_hist23:45:011
3172051993729,6cyclictest3397414-21latency_hist22:55:011
3172051993729,6cyclictest3397414-21latency_hist22:55:001
3172051993717,17cyclictest1704890-21systemd-journal22:34:591
3172047993728,7cyclictest3252321-21ntpq20:25:430
3172047993728,6cyclictest3427013-21latency_hist23:25:010
3172051993625,9cyclictest3447314-21cpuspeed_turbos23:45:331
3172051993624,10cyclictest3417173-21systemd-run23:15:011
3172047993627,7cyclictest3287099-21ntpq21:00:430
3172056993526,7cyclictest3466615-21turbostat.cron00:05:002
3172056993522,11cyclictest3491919-21fschecks_count00:30:342
3172056993521,12cyclictest3332034-21unixbench_multi21:45:492
3172056993519,14cyclictest3213493-21cron19:50:012
3172051993527,5cyclictest3233461-21latency_hist20:10:001
3172051993525,7cyclictest1704890-21systemd-journal21:56:471
3172051993518,15cyclictest1704890-21systemd-journal23:25:011
3172051993516,17cyclictest3486673-21acpi00:25:281
3172047993527,6cyclictest3460692-21ntpq23:55:420
3172047993525,7cyclictest3417149-21latency_hist23:15:010
3172056993428,4cyclictest3273465-21apt-get20:50:292
3172056993428,4cyclictest3273465-21apt-get20:50:292
3172056993414,18cyclictest1704890-21systemd-journal23:10:012
317205699341,26cyclictest3228809-21apt-get20:05:292
3172051993427,5cyclictest3308094-21apt-get21:25:281
3172047993428,4cyclictest3129120-21kworker/u8:3+flush-8:020:50:310
3172047993428,4cyclictest3129120-21kworker/u8:3+flush-8:020:50:300
3172047993427,5cyclictest3283059-21latency_hist21:00:010
3172047993427,5cyclictest1704890-21systemd-journal20:41:470
3172047993424,8cyclictest3222665-21ntpq19:55:420
31716702344,9sleep10-21swapper/119:09:351
31716702344,9sleep10-21swapper/119:09:351
317205699331,26cyclictest3288288-21apt-get21:05:312
317205699331,25cyclictest3308094-21apt-get21:25:292
3172056993311,18cyclictest3423613-21tr23:20:382
317205199339,19cyclictest589-21runrttasks23:05:301
317205199334,6cyclictest0-21swapper/100:10:341
317205199334,5cyclictest0-21swapper/119:10:301
317205199334,5cyclictest0-21swapper/119:10:291
3172051993329,3cyclictest3441841-21cron23:40:001
3172051993329,2cyclictest3358659-21irqrtprio22:15:351
3172051993326,5cyclictest3306943-21ntpq21:20:471
3172051993324,7cyclictest3268509-21/usr/sbin/munin20:45:411
3172051993321,11cyclictest0-21swapper/100:20:341
3172051993321,11cyclictest0-21swapper/100:20:331
3172051993321,10cyclictest3464099-21kthreadcore00:00:401
3172047993325,6cyclictest3412215-21latency_hist23:10:010
317205699322,23cyclictest3194021-21apt-get19:30:292
3172056993216,14cyclictest3243636-21aten2_r5power_c20:20:292
317205699320,17cyclictest3189808-21/usr/sbin/munin19:25:382
317205199327,8cyclictest3313004-21apt-get21:30:311
317205199326,5cyclictest3431046-21sed23:25:431
317205199324,5cyclictest0-21swapper/122:10:301
317205199324,4cyclictest0-21swapper/119:25:311
3172051993227,3cyclictest3402855-21cpuspeed_turbos23:00:321
317205199322,11cyclictest3247434-21ntpq20:20:421
3172051993219,11cyclictest0-21swapper/100:35:401
3172047993227,3cyclictest3382368-21latency_hist22:40:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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