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2026-08-14 - 08:06

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 Fri Aug 14, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19621252680,3sleep10-21swapper/122:17:441
1776182996455,6cyclictest2090626-21latency_hist00:25:011
1776180996251,8cyclictest1907145-21latency_hist21:20:010
1776180995646,7cyclictest1946690-21latency_hist22:00:000
1776180995444,6cyclictest2095583-21latency_hist00:30:010
1776186995146,4cyclictest2078976-21kworker/u8:2+flush-8:000:12:592
19315412500,6sleep20-21swapper/221:43:022
1776186994641,3cyclictest2000555-21kworker/u8:3+flush-8:022:55:002
1776182994638,6cyclictest275-21systemd-journal22:39:551
1776182994637,6cyclictest275-21systemd-journal20:38:501
1776180994641,3cyclictest425360-21kworker/u8:3+flush-8:020:07:590
1776180994641,3cyclictest425360-21kworker/u8:3+flush-8:020:07:590
1776180994535,8cyclictest2036854-21diskstats23:32:440
1776180994535,8cyclictest2036854-21diskstats23:32:440
1776180994435,6cyclictest1822085-21ntpq19:52:540
1776186994339,3cyclictest1891663-21kworker/u8:0+flush-8:021:25:012
1776180994338,3cyclictest1891663-21kworker/u8:0+flush-8:022:33:010
1776180994335,6cyclictest2089922-21ntpq00:22:580
1776186994238,3cyclictest1761514-21kworker/u8:2+flush-8:019:20:002
1776186994236,4cyclictest1981096-21kworker/u8:2+flush-8:022:48:012
1776182994134,5cyclictest1882887-21apt-get20:57:401
1776180994133,6cyclictest2016834-21diskstats23:12:450
1776180994133,5cyclictest275-21systemd-journal23:48:550
1776186994035,4cyclictest1951634-21kworker/u8:3+flush-8:022:23:012
1776186994035,3cyclictest1891663-21kworker/u8:0+events_unbound22:12:452
1776182994033,5cyclictest275-21systemd-journal22:44:561
1776180994029,9cyclictest1893026-21diskstats21:07:440
1776182993935,3cyclictest2000555-21kworker/u8:3+flush-8:023:42:481
1776182993930,6cyclictest2026025-21latency_hist23:20:001
1776180993930,6cyclictest1832740-21latency_hist20:05:000
1776180993929,7cyclictest1981672-21/usr/sbin/munin22:37:530
1776182993831,5cyclictest1852374-21kworker/u8:1+flush-8:020:32:581
1776182993830,6cyclictest1787185-21ntpq19:17:541
1776180993832,4cyclictest1761514-21kworker/u8:2+flush-8:021:12:480
1776180993828,8cyclictest2070131-21ntpq00:02:520
1776186993732,4cyclictest1981096-21kworker/u8:2+flush-8:023:22:572
1776182993732,4cyclictest1891663-21kworker/u8:0+flush-8:021:58:001
1776182993729,6cyclictest1937244-21apt-get21:52:431
1776182993729,6cyclictest1937244-21apt-get21:52:431
1776180993733,3cyclictest1981096-21kworker/u8:2+flush-8:023:42:550
1776180993730,5cyclictest1956566-21latency_hist22:10:010
1776182993529,5cyclictest1776052-21kworker/u8:0+flush-8:019:28:021
1776182993529,4cyclictest1761514-21kworker/u8:2+flush-8:019:47:451
1776182993528,5cyclictest2076237-21apt-get00:12:441
1776180993528,5cyclictest1857480-21latency_hist20:30:010
1776180993526,7cyclictest1802379-21ntpq19:32:560
1776186993429,3cyclictest425360-21kworker/u8:3+flush-8:021:02:482
1776186993425,6cyclictest275-21systemd-journal21:15:012
1776182993424,7cyclictest275-21systemd-journal20:20:001
1776182993327,5cyclictest1990734-21kworker/u8:1+events_unbound22:47:561
1776182993326,6cyclictest1878174-21cpuspeed_turbos20:52:461
1776182993325,5cyclictest1951614-21latency_hist22:05:011
1776180993327,4cyclictest1951634-21kworker/u8:3+flush-8:022:20:010
1776180993323,7cyclictest1847569-21latency_hist20:20:010
1776182993227,4cyclictest425360-21kworker/u8:3+flush-8:019:57:481
1776182993226,4cyclictest2016130-21turbostat.cron23:10:001
1776182993225,5cyclictest275-21systemd-journal20:04:431
1776182993225,5cyclictest275-21systemd-journal00:38:001
1776182993225,5cyclictest1922417-21/usr/sbin/munin21:37:581
1776182993223,7cyclictest1788640-21apt-get19:22:431
1776182993223,6cyclictest1981240-21latency_hist22:35:011
1776180993229,2cyclictest1926898-21sh21:40:000
1776180993227,4cyclictest2026114-21base6423:20:000
1776180993227,4cyclictest2000555-21kworker/u8:3+events_unbound23:07:580
1776180993226,4cyclictest1863597-21irqrtprio20:37:490
1776180993222,7cyclictest2036151-21latency_hist23:30:000
1776186993126,4cyclictest1776052-21kworker/u8:0+flush-8:019:12:532
1776186993125,4cyclictest1867379-21apt-get20:40:002
1776182993125,4cyclictest1901223-21kthreadcore21:12:531
1776182993125,4cyclictest1808493-21apt-get19:42:411
1776182993123,6cyclictest1874954-21sshd20:47:491
1776180993126,4cyclictest1852374-21kworker/u8:1+flush-8:022:27:570
1776180993126,3cyclictest2056188-21kworker/u8:3+flush-8:023:55:320
1776180993122,4cyclictest275-21systemd-journal20:40:010
1776180993121,8cyclictest1827069-21ntpq19:57:540
17759462314,9sleep20-21swapper/219:09:352
1776186993026,3cyclictest1981096-21kworker/u8:2+flush-8:023:07:542
1776186993025,4cyclictest1761514-21kworker/u8:2+flush-8:020:57:532
1776182993024,4cyclictest1976333-21latency_hist22:30:011
1776180993027,2cyclictest1887415-21systemd-run21:00:010
1776180993026,2cyclictest0-21swapper/019:50:000
1776180993021,6cyclictest275-21systemd-journal19:17:430
1776182992925,3cyclictest844-21mta-sts-daemon21:07:461
1776182992925,3cyclictest401-21dbus-daemon00:20:001
1776182992924,4cyclictest1981096-21kworker/u8:2+flush-8:023:12:491
1776182992923,5cyclictest1981096-21kworker/u8:2+events_unbound23:37:561
1776182992922,5cyclictest2096042-21apt-get00:32:421
1776182992922,5cyclictest2056201-21kworker/u8:4+flush-8:023:57:561
1776180992925,3cyclictest1891663-21kworker/u8:0+events_unbound21:42:510
1776180992922,5cyclictest1848290-21diskstats20:22:460
1776180992921,6cyclictest1917484-21/usr/sbin/munin21:33:000
1776180992921,5cyclictest275-21systemd-journal23:05:000
1776180992919,8cyclictest275-21systemd-journal20:50:000
17756232293,18sleep00-21swapper/019:08:000
1776186992824,3cyclictest1981096-21kworker/u8:2+events_unbound23:12:572
1776186992822,5cyclictest1891663-21kworker/u8:0+flush-8:021:29:572
1776182992824,3cyclictest1852374-21kworker/u8:1-ext4-rsv-conversion21:50:001
1776182992824,3cyclictest1776175-21cyclictest19:33:001
1776182992823,3cyclictest1907152-21/usr/sbin/munin21:20:001
1776182992820,3cyclictest1891663-21kworker/u8:0+events_unbound22:23:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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