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2026-08-30 - 11:03

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 30, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14518042860,5chrt0-21swapper/321:52:423
15171112650,0sleep1281rcuc/122:57:491
15965282640,4chrt0-21swapper/100:20:001
13094952490,3sleep3575-21kworker/3:2+events19:32:293
1287471994840,5cyclictest1452960-21latency_hist21:55:000
1287475994637,6cyclictest1472693-21latency_hist22:15:001
1287471994637,6cyclictest1512438-21latency_hist22:55:010
1287475994436,5cyclictest1611496-21latency_hist00:35:011
1287475994434,8cyclictest1506712-21ntpq22:47:431
12869082440,16sleep10-21swapper/119:07:551
1287471994133,5cyclictest1606560-21latency_hist00:30:000
1287475994031,7cyclictest275-21systemd-journal19:36:251
1287471994031,6cyclictest1358384-21latency_hist20:20:010
14820892390,2sleep3575-21kworker/3:2-events22:22:443
1287475993832,5cyclictest1606565-21idleruntime-cro00:30:001
1287475993827,8cyclictest275-21systemd-journal21:50:281
128747199380,36cyclictest1547031-21true23:30:000
1287471993728,6cyclictest1383843-21grep20:47:320
128747199361,31cyclictest1309096-21unin-run19:30:010
1287479993530,4cyclictest1098329-21kworker/u8:2+events_unbound20:27:482
1287471993527,6cyclictest275-21systemd-journal00:20:000
1287471993525,7cyclictest1477603-21apt-get22:20:010
15290082340,3sleep0201rcuc/023:12:370
1287479993424,8cyclictest275-21systemd-journal00:25:012
1287475993425,6cyclictest275-21systemd-journal23:20:001
1287471993426,6cyclictest1383122-21latency_hist20:45:010
1287475993325,6cyclictest1438368-21/usr/sbin/munin21:42:421
1287471993329,2cyclictest1576693-21basename00:00:000
1287471993328,3cyclictest1472677-21cron22:15:010
1287471993326,5cyclictest1423180-21latency_hist21:25:010
1287471993316,14cyclictest275-21systemd-journal22:06:280
128747199330,31cyclictest1601444-21unin-run00:25:010
1287479993227,4cyclictest1373435-21kworker/u8:0+events_unbound00:32:462
1287475993227,3cyclictest1552941-21irqcore23:37:341
1287475993227,3cyclictest1419225-21irqcore21:22:361
1287475993226,4cyclictest1576678-21cron00:00:001
1287479993126,4cyclictest1098329-21kworker/u8:2+flush-8:020:17:482
1287479993125,4cyclictest1413002-21gpgv21:15:002
1287475993127,3cyclictest1343618-21systemd-run20:05:001
1287471993123,6cyclictest1556660-21unixbench_singl23:37:470
15020812300,4sleep00-21swapper/022:42:470
1287479993026,3cyclictest1571714-21cron23:55:002
1287475993025,3cyclictest1398167-21cron21:00:001
1287475993022,5cyclictest1368271-21latency_hist20:30:011
1287475993020,8cyclictest275-21systemd-journal22:20:011
1287475993019,8cyclictest275-21systemd-journal19:12:251
1287471993027,2cyclictest1486911-21needreboot22:27:410
1287471993025,3cyclictest1318109-21needreboot19:37:430
1287471993023,5cyclictest1388960-21cpuspeed_turbos20:52:320
1287471993023,3cyclictest1408070-21systemd-run21:10:000
1287475992924,4cyclictest1354114-21cpuspeed_turbos20:17:311
1287475992924,3cyclictest1551966-21cron23:35:001
1287475992924,3cyclictest1373435-21kworker/u8:0+flush-8:020:37:391
1287475992923,4cyclictest1487493-21unixbench_singl22:27:491
1287475992921,6cyclictest275-21systemd-journal19:42:251
1287471992925,2cyclictest1343593-21cron20:05:000
1287471992924,3cyclictest1532944-21fschecks_count23:17:330
1287471992923,4cyclictest1517413-21systemd-run23:00:010
1287471992923,4cyclictest1333480-21unixbench_singl19:52:500
1287471992921,5cyclictest1482810-21latency_hist22:25:010
1287479992825,2cyclictest1517124-21unixbench_multi22:57:492
1287479992824,2cyclictest1507245-21unixbench_singl22:47:512
1287479992823,3cyclictest1527245-21cron23:10:002
1287475992825,2cyclictest1527277-21systemd-run23:10:011
1287475992824,3cyclictest1566997-21kworker/u8:2+events_unbound00:07:391
1287475992824,3cyclictest1566997-21kworker/u8:2+events_unbound00:07:391
1287475992824,3cyclictest1383638-21wget20:47:301
1287475992824,2cyclictest1390895-21kthreadcore20:52:391
1287475992823,3cyclictest1462839-21sh22:05:001
1287475992823,3cyclictest1399355-21irqrtprio21:02:351
1287475992822,4cyclictest1591304-21unixbench_singl00:12:501
1287475992821,5cyclictest1557345-21apt-get23:42:291
1287471992822,3cyclictest1567563-21fschecks_time23:52:350
1287479992724,2cyclictest1417369-21needreboot21:17:422
1287479992724,2cyclictest1314736-21fschecks_count19:37:352
1287479992723,3cyclictest1098329-21kworker/u8:2+events_unbound20:03:252
1287479992722,3cyclictest1240806-21kworker/u8:3+events_unbound23:30:112
1287479992722,3cyclictest1098329-21kworker/u8:2+events_unbound20:20:022
1287475992723,3cyclictest1329304-21aten2_r5power_p19:52:321
1287475992721,4cyclictest1457687-21unixbench_singl21:57:511
1287475992721,4cyclictest1457687-21unixbench_singl21:57:511
1287475992720,6cyclictest1498276-21cpuspeed_turbos22:42:311
1287471992724,1cyclictest1388515-21kworker/u8:1+events_unbound22:00:000
1287471992724,1cyclictest1388515-21kworker/u8:1+events_unbound22:00:000
1287471992723,3cyclictest1240806-21kworker/u8:3+flush-8:021:36:590
1287471992722,3cyclictest1-21systemd23:45:000
1287471992722,2cyclictest0-21swapper/021:15:000
1287471992721,4cyclictest1566448-21timerwakeupswit23:47:490
1287479992623,2cyclictest1344303-21fschecks_count20:07:322
1287479992622,3cyclictest1388515-21kworker/u8:1+events_unbound00:27:452
1287479992621,3cyclictest1487485-21unixbench_singl22:27:492
1287479992621,3cyclictest1388515-21kworker/u8:1+events_unbound21:20:022
1287475992622,3cyclictest1433046-21systemd-run21:35:001
1287475992622,2cyclictest0-21swapper/122:32:501
1287475992622,2cyclictest0-21swapper/100:37:411
1287475992621,4cyclictest1313744-21unixbench_multi19:32:491
1287475992621,3cyclictest1581673-21systemd-run00:05:001
1287475992620,4cyclictest1413660-21apt-get21:17:301
1287475992619,5cyclictest1352730-21ntpq20:12:441
1287475992617,7cyclictest275-21systemd-journal19:50:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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