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2026-06-23 - 14:32

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 Tue Jun 23, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26534852630,2sleep375-21kworker/3:1-events11:55:243
2367731996050,8cyclictest2428735-21kworker/u8:1+flush-8:008:50:220
2367731995949,8cyclictest2527718-21kworker/u8:1+flush-8:010:20:380
2367734995548,5cyclictest2562363-21ntpq10:20:331
2367731995546,6cyclictest2434035-21latency_hist08:15:010
2367739995442,9cyclictest2433150-21ntpq08:10:312
2367731995446,6cyclictest2439448-21kworker/u8:2+flush-8:008:25:310
25047662530,4chrt371rcuc/209:25:252
25047662530,4chrt371rcuc/209:25:242
2367731995348,3cyclictest2548071-21kworker/u8:0+events_unbound10:35:220
236773199521,49cyclictest1-21systemd10:10:010
2367739995142,7cyclictest1704890-21systemd-journal10:10:012
2367739995141,7cyclictest2444207-21turbostat.cron08:25:002
2367734995145,4cyclictest2533197-21kworker/u8:2+events_unbound11:50:371
2367734995142,6cyclictest2503597-21latency_hist09:25:011
2367734995043,5cyclictest2428161-21ntpq08:05:311
2367734995036,10cyclictest1704890-21systemd-journal12:00:441
2367731995039,8cyclictest2592053-21ntpq10:50:330
2367739994840,5cyclictest2372791-21munin-node07:15:022
2367731994735,10cyclictest1704890-21systemd-journal09:50:000
2367731994640,5cyclictest2548071-21kworker/u8:0+flush-8:010:15:320
2367734994539,4cyclictest2548071-21kworker/u8:0+flush-8:010:15:381
2367734994537,6cyclictest2573128-21latency_hist10:35:001
2367731994536,6cyclictest2632935-21latency_hist11:35:000
2367734994439,3cyclictest2597862-21kworker/u8:4+flush-8:011:10:361
2367734994432,9cyclictest1704890-21systemd-journal11:35:431
2367731994337,4cyclictest2548071-21kworker/u8:0+flush-8:010:25:360
2367731994335,5cyclictest2428735-21kworker/u8:1+flush-8:008:45:360
2367731994331,9cyclictest2583572-21diskstats10:45:180
2367734994235,5cyclictest1704890-21systemd-journal10:40:441
2367734994231,8cyclictest2463094-21ntpq08:40:341
2367731994230,9cyclictest2438051-21ntpq08:15:310
2367731994135,4cyclictest1645010-21kworker/u8:1+flush-8:007:35:350
2367739994034,4cyclictest2399065-21kworker/u8:3+flush-8:007:40:152
2367731994034,4cyclictest2419199-21kworker/u8:0+flush-8:008:35:200
2367731994032,6cyclictest2383479-21ntpq07:20:300
2367731994026,10cyclictest1704890-21systemd-journal08:05:000
2367734993932,5cyclictest2448280-21ntpq08:25:321
2367734993930,6cyclictest2676559-21ntpq12:15:321
2367731993933,4cyclictest2527718-21kworker/u8:1+events_unbound11:40:270
2367731993930,6cyclictest2443315-21ntpq08:20:320
2367731993926,9cyclictest2618282-21kworker/u8:0+flush-8:011:55:320
2367739993830,5cyclictest2513444-21journal-offline09:34:272
2367734993830,6cyclictest2527718-21kworker/u8:1+flush-8:011:05:311
2367734993830,5cyclictest2568210-21latency_hist10:30:011
2367731993833,4cyclictest2533197-21kworker/u8:2+flush-8:010:30:360
2367731993832,4cyclictest2419199-21kworker/u8:0+flush-8:009:10:230
2367731993827,8cyclictest2596997-21ntpq10:55:330
2367731993731,4cyclictest2527718-21kworker/u8:1+events_unbound10:00:260
2367731993730,5cyclictest2533197-21kworker/u8:2+flush-8:011:00:310
2367731993730,4cyclictest2661748-21kworker/u8:3+flush-8:012:05:300
2367731993729,6cyclictest2414172-21basename07:55:010
2367734993631,3cyclictest2512665-21ntpq09:30:341
2367734993630,4cyclictest2652984-21apt-get11:55:161
2367734993530,3cyclictest2523458-21gpgv09:45:001
2367734993528,5cyclictest2677992-21apt-get12:20:171
2367734993524,8cyclictest1704890-21systemd-journal09:11:431
2367731993530,3cyclictest2533197-21kworker/u8:2+flush-8:012:25:200
2367731993528,5cyclictest2439448-21kworker/u8:2+flush-8:008:55:210
2367731993528,5cyclictest1645010-21kworker/u8:1+events_unbound07:10:330
2367731993525,8cyclictest2414692-21diskstats07:55:220
2367739993424,8cyclictest2519120-21fschecks_time09:40:222
2367734993425,7cyclictest2428735-21kworker/u8:1+flush-8:009:35:211
2367739993328,4cyclictest2358030-21kworker/u8:2+flush-8:008:00:312
2367739993324,6cyclictest2444784-21fschecks_time08:25:212
2367734993327,4cyclictest2667567-21journal-offline12:10:001
2367734993325,6cyclictest2404502-21/usr/sbin/munin07:45:301
2367734993324,7cyclictest2438138-21ntpq08:15:341
2367731993329,3cyclictest2533197-21kworker/u8:2+flush-8:009:55:360
2367731993328,3cyclictest2518730-21kworker/u8:2+flush-8:009:40:320
2367731993327,4cyclictest2697464-21latency_hist12:40:010
2367731993327,4cyclictest2697464-21latency_hist12:40:000
2367731993326,5cyclictest1704890-21systemd-journal09:04:220
2367731993325,5cyclictest2403305-21ntpq07:40:310
2367739993226,4cyclictest1645010-21kworker/u8:1+flush-8:007:20:322
2367734993226,4cyclictest2697497-21true12:40:001
2367734993226,4cyclictest2697497-21true12:40:001
2367734993226,4cyclictest2552474-21ntpq10:10:311
2367734993223,7cyclictest2627956-21latency_hist11:30:011
2367731993227,3cyclictest8550irq/124-ahci[0000:00:12.0]09:05:310
2367731993224,6cyclictest2618282-21kworker/u8:0+flush-8:011:20:360
2367731993224,5cyclictest2508160-21grep09:25:380
2367731993224,5cyclictest2508160-21grep09:25:370
2367731993224,5cyclictest2389603-21/usr/sbin/munin07:30:290
2367734993128,2cyclictest2527718-21kworker/u8:1+events_unbound11:15:341
2367734993126,3cyclictest2453657-21unixbench_multi08:30:401
2367734993124,6cyclictest2419199-21kworker/u8:0+flush-8:008:55:301
2367734993124,5cyclictest1704890-21systemd-journal08:23:431
2367734993123,6cyclictest2358030-21kworker/u8:2+flush-8:007:10:361
2367734993123,5cyclictest2384436-21latency_hist07:25:021
2367731993127,3cyclictest2607877-21basename11:10:000
2367731993124,5cyclictest2428735-21kworker/u8:1+flush-8:009:20:000
2367731993121,8cyclictest2532604-21ntpq09:50:310
2367739993025,4cyclictest2533197-21kworker/u8:2+flush-8:011:25:362
2367739993025,3cyclictest2449779-21fschecks_time08:30:242
2367739993024,4cyclictest2553981-21fschecks_time10:15:222
2367739993021,7cyclictest2608427-21fschecks_count11:10:202
2367739993018,9cyclictest2618168-21cat11:20:012
2367734993027,2cyclictest2687616-21systemd-run12:29:591
2367734993026,3cyclictest2533197-21kworker/u8:2+flush-8:010:45:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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