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2026-07-24 - 01:56

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 Thu Jul 23, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
190483121000,18sleep3577-21kworker/3:2+events10:52:463
168224099511,47cyclictest1-21systemd07:35:010
168224099511,47cyclictest1-21systemd07:35:000
1682240994942,5cyclictest1723810-21base6407:50:010
1682240994738,7cyclictest1693968-21latency_hist07:20:020
20058392460,4chrt0-21swapper/112:32:461
1682242994525,18cyclictest1928632-21kthreadcore11:17:431
1682240994535,7cyclictest1682051-21latency_hist07:10:010
168224099451,40cyclictest1-21systemd07:15:000
1682242994334,6cyclictest1738774-21latency_hist08:05:021
1682242994327,14cyclictest1723738-21apt-key07:50:011
1682240994333,8cyclictest2001001-21ntpq12:27:480
1682246994233,7cyclictest1837788-21apt-get09:45:002
1682242994125,13cyclictest1773469-21latency_hist08:40:011
1682242994115,6cyclictest0-21swapper/109:45:031
168224099411,36cyclictest1738791-21true08:05:000
1682242994020,8cyclictest1947076-21latency_hist11:35:011
1682240994029,7cyclictest278-21systemd-journal11:47:500
168224099401,33cyclictest1793293-21kworker/0:0+events09:11:370
1682240993930,6cyclictest1952039-21latency_hist11:40:010
1682242993830,5cyclictest1887718-21latency_hist10:35:011
168224099382,31cyclictest1897645-21kworker/0:0+events11:11:130
1682246993733,3cyclictest1848131-21kworker/u8:2+flush-8:010:55:012
1682242993728,7cyclictest278-21systemd-journal09:42:581
168224099372,30cyclictest1932263-21kworker/0:2+events12:17:050
168224099372,30cyclictest1932263-21kworker/0:2+events11:51:050
168224099372,30cyclictest1827909-21kworker/0:2+events09:51:490
168224099370,32cyclictest1827909-21kworker/0:2+events09:55:130
1682246993629,5cyclictest1882786-21/usr/sbin/munin10:30:002
1682240993627,6cyclictest1897612-21latency_hist10:45:010
1682240993615,15cyclictest278-21systemd-journal12:32:500
168224099361,30cyclictest1738795-21kworker/0:1+events08:45:170
1682240993529,4cyclictest1774866-21kthreadcore08:42:460
1682240993527,6cyclictest1783779-21/usr/sbin/munin08:52:470
1682240993525,8cyclictest1908148-21diskstats10:57:400
1682240993523,9cyclictest1862250-21ntpq10:07:490
168224099352,32cyclictest1827909-21kworker/0:2+events10:31:170
168224099351,29cyclictest1827909-21kworker/0:2+events09:36:050
168224099350,29cyclictest1645603-21kworker/0:0+events07:25:330
1682246993430,3cyclictest1848131-21kworker/u8:2+flush-8:011:17:432
1682240993427,5cyclictest1723744-21kworker/u8:0+events_unbound09:42:460
168224099342,31cyclictest1827909-21kworker/0:2+events10:18:050
1682242993326,5cyclictest1709239-21apt-get07:37:361
1682240993325,5cyclictest1956991-21latency_hist11:45:010
17063042320,5sleep3451irq_work/307:32:453
17063042320,5sleep3451irq_work/307:32:453
1682246993228,3cyclictest1937196-21kworker/u8:0+events_unbound12:40:012
1682246993227,4cyclictest1748684-21kworker/u8:3+flush-8:010:12:492
1682246993226,4cyclictest1956987-21cron11:45:002
1682246993226,4cyclictest1748684-21kworker/u8:3+events_unbound09:27:432
1682242993223,7cyclictest1813462-21/usr/sbin/munin09:22:521
168224099328,19cyclictest1793293-21kworker/0:0+events09:30:140
168224099322,25cyclictest1738795-21kworker/0:1+events08:05:250
168224099321,30cyclictest1932263-21kworker/0:2+events12:04:100
168224099321,30cyclictest1713046-21kworker/0:3+events07:52:170
168224099321,30cyclictest1713046-21kworker/0:3+events07:38:210
168224099321,27cyclictest1897645-21kworker/0:0+events11:05:220
168224099320,30cyclictest1738795-21kworker/0:1+events08:58:370
19849142310,4sleep10-21swapper/112:12:481
1682242993126,4cyclictest1867972-21kworker/u8:1+events_unbound11:57:441
1682242993122,6cyclictest1827873-21latency_hist09:35:001
1682240993126,3cyclictest2007871-21irqrtprio12:37:420
1682240993126,3cyclictest1730075-21irqrtprio07:57:440
168224099312,27cyclictest1827909-21kworker/0:2+events10:04:130
1682240993122,6cyclictest1798205-21latency_hist09:05:010
168224099312,24cyclictest1932263-21kworker/0:2+events12:07:290
1682246993023,5cyclictest1857853-21awk10:05:002
1682242993025,3cyclictest1749840-21irqrtprio08:17:451
1682242993021,7cyclictest1818373-21/usr/sbin/munin09:27:471
168224099308,19cyclictest1793293-21kworker/0:0+events09:15:020
168224099306,19cyclictest1827909-21kworker/0:2+events10:21:130
1682240993025,2cyclictest0-21swapper/010:37:500
168224099302,27cyclictest1827909-21kworker/0:2+events10:11:290
1682240993017,12cyclictest1738795-21kworker/0:1+events08:17:570
1682242992923,4cyclictest1793722-21apt-get09:02:391
168224099299,16cyclictest1932263-21kworker/0:2+events11:31:140
168224099298,20cyclictest1738795-21kworker/0:1+events08:29:010
168224099298,16cyclictest1738795-21kworker/0:1+events08:30:090
168224099297,21cyclictest1827909-21kworker/0:2+events10:29:490
1682240992923,4cyclictest1769655-21tr08:37:440
168224099292,26cyclictest1793293-21kworker/0:0+events09:24:410
168224099292,26cyclictest1738795-21kworker/0:1+events08:10:450
1682240992920,7cyclictest1718008-21ntpq07:42:500
168224099291,27cyclictest1897645-21kworker/0:0+events11:03:450
168224099291,27cyclictest1793293-21kworker/0:0+events09:28:370
19378252280,15sleep20-21swapper/211:27:392
1682246992824,2cyclictest1693710-21unixbench_multi07:17:562
1682246992823,4cyclictest1723744-21kworker/u8:0+flush-8:008:47:542
168224699281,25cyclictest1-21systemd12:20:002
1682242992824,3cyclictest1695153-21irqrtprio07:22:451
1682242992824,2cyclictest0-21swapper/108:45:001
1682242992820,5cyclictest278-21systemd-journal10:18:001
168224099288,19cyclictest1897645-21kworker/0:0+events11:22:250
168224099288,19cyclictest1897645-21kworker/0:0+events11:22:250
168224099288,15cyclictest1897645-21kworker/0:0+events11:27:130
168224099282,25cyclictest1793293-21kworker/0:0+events09:09:290
168224099282,25cyclictest1738795-21kworker/0:1+events08:24:370
168224099282,21cyclictest1897645-21kworker/0:0+events11:15:370
168224099280,27cyclictest1897645-21kworker/0:0+events10:51:130
1682246992722,4cyclictest1748684-21kworker/u8:3+flush-8:008:37:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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