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2026-08-21 - 18:45

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 21, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18601122600,5chrt0-21swapper/308:55:023
1753480995648,6cyclictest1799851-21latency_hist07:55:011
1753483995549,4cyclictest1854887-21gpgv08:50:012
1753480995546,6cyclictest1780001-21latency_hist07:35:011
1753480995243,6cyclictest1909903-21latency_hist09:45:011
1753476995142,6cyclictest1859970-21latency_hist08:55:010
1753480995043,5cyclictest1753785-21/usr/sbin/munin07:12:531
1753476995040,7cyclictest2053753-21latency_hist12:10:000
1753480994836,9cyclictest1914135-21ntpq09:47:521
20323322460,2sleep3575-21kworker/3:2+mm_percpu_wq11:47:453
1753476994639,5cyclictest1849825-21latency_hist08:45:010
18962892450,1sleep2371rcuc/209:32:442
1753476994541,3cyclictest2029269-21kworker/u8:2+events_unbound12:37:520
1753483994427,15cyclictest1880218-21aten2_r5power_c09:17:362
1753476994434,8cyclictest1963781-21ntpq10:37:490
1753480994338,4cyclictest1875041-21kworker/u8:0+events_unbound09:32:551
1753480994337,4cyclictest275-21systemd-journal08:58:191
1753476994336,5cyclictest1765221-21kworker/u8:1+flush-8:007:37:390
1753480994237,4cyclictest101218-21kworker/u8:3+flush-8:008:47:501
1753480994237,3cyclictest1779871-21kworker/u8:0+flush-8:008:07:401
1753480994237,3cyclictest1738001-21kworker/u8:2+events_unbound07:17:361
1753480994232,8cyclictest1950356-21diskstats10:27:391
1753480994232,8cyclictest1950356-21diskstats10:27:391
1753476994233,7cyclictest1994766-21/usr/sbin/munin11:12:460
1753476994230,9cyclictest275-21systemd-journal12:25:000
1753483994126,13cyclictest1905470-21aten2_r5power_c09:42:362
1753480994134,5cyclictest275-21systemd-journal11:59:191
1753480994134,5cyclictest2034698-21diskstats11:52:401
1753480994134,4cyclictest275-21systemd-journal09:35:191
1753480994033,5cyclictest1779871-21kworker/u8:0+flush-8:008:30:311
1753480994033,5cyclictest1779871-21kworker/u8:0+flush-8:008:30:311
1753480994030,7cyclictest275-21systemd-journal10:36:191
1753476994032,6cyclictest101218-21kworker/u8:3+flush-8:008:02:410
1753476994027,10cyclictest275-21systemd-journal12:05:000
1753483993924,13cyclictest1920041-21kworker/u8:2-ext4-rsv-conversion11:00:002
18967762380,5sleep3451irq_work/309:32:453
175348399382,28cyclictest2034448-21apt-get11:52:362
1753480993834,3cyclictest1779871-21kworker/u8:0+flush-8:008:22:531
1753480993831,5cyclictest1945167-21/usr/sbin/munin10:22:521
1753480993831,5cyclictest1945167-21/usr/sbin/munin10:22:521
1753476993832,4cyclictest1875041-21kworker/u8:0+events_unbound11:02:550
1753483993719,16cyclictest1779991-21cron07:35:002
1753480993732,4cyclictest1920041-21kworker/u8:2+flush-8:009:57:491
1753480993729,6cyclictest2063609-21latency_hist12:20:011
1753476993728,6cyclictest2014227-21latency_hist11:30:010
1753476993727,7cyclictest1900035-21latency_hist09:35:010
18906082360,3sleep3575-21kworker/3:2+events09:27:403
1753480993631,4cyclictest2029269-21kworker/u8:2+flush-8:012:02:431
1753480993630,4cyclictest1875041-21kworker/u8:0+flush-8:011:07:521
1753480993626,8cyclictest1928977-21ntpq10:02:481
1753476993627,7cyclictest1839772-21cp08:35:000
1753476993627,7cyclictest1839772-21cp08:35:000
1753480993531,3cyclictest1800075-21kworker/u8:2+events_unbound09:02:381
1753480993530,4cyclictest2029269-21kworker/u8:2+flush-8:012:32:381
1753476993529,4cyclictest1855333-21kworker/u8:1+events_unbound09:42:530
175348399342,25cyclictest1860424-21taskset08:57:372
175348399341,26cyclictest1999755-21apt-get11:17:372
1753480993430,3cyclictest2009285-21kworker/u8:3+events_unbound11:37:531
1753480993430,3cyclictest1875041-21kworker/u8:0+flush-8:010:42:411
1753480993425,7cyclictest1885375-21/usr/sbin/munin09:22:541
1753476993429,4cyclictest1999564-21kworker/u8:1+flush-8:011:52:540
1753483993320,11cyclictest1844877-21sendmail08:40:002
1753483993318,13cyclictest2055133-21kthreadcore12:12:442
1753480993328,4cyclictest1800075-21kworker/u8:2+flush-8:008:42:411
1753480993327,4cyclictest1800075-21kworker/u8:2+flush-8:008:37:501
1753480993327,4cyclictest1770148-21ls07:25:001
1753480993325,6cyclictest1920041-21kworker/u8:2+events_unbound10:57:481
1753476993328,4cyclictest1804776-21cron08:00:000
19093732320,4sleep3575-21kworker/3:2+events09:42:533
1753483993223,7cyclictest275-21systemd-journal07:40:002
175348399322,23cyclictest1945194-21apt-get10:22:362
175348399322,23cyclictest1945194-21apt-get10:22:362
175348399322,23cyclictest1885400-21apt-get09:22:372
175348399321,25cyclictest1-21systemd11:47:532
1753480993228,3cyclictest2069728-21irqrtprio12:27:421
1753480993227,4cyclictest1870066-21kworker/u8:3+flush-8:009:27:541
1753480993227,3cyclictest1870817-21irqcore09:07:421
1753476993228,3cyclictest1864871-21cron09:00:000
1753476993227,3cyclictest1924740-21idleruntime-cro10:00:000
1753476993226,4cyclictest1765221-21kworker/u8:1+flush-8:007:30:010
1753476993225,5cyclictest101218-21kworker/u8:3+events_unbound08:30:000
1753476993224,6cyclictest275-21systemd-journal07:50:000
1753476993223,7cyclictest1894843-21apt-get09:30:010
1753483993124,5cyclictest275-21systemd-journal10:40:012
175348399312,22cyclictest2078855-21apt-get12:37:352
175348399312,22cyclictest1900486-21apt-get09:37:372
1753480993127,3cyclictest1875041-21kworker/u8:0+events_unbound11:02:471
1753480993126,4cyclictest1870066-21kworker/u8:3+flush-8:009:17:521
1753480993122,7cyclictest1935046-21/usr/sbin/munin10:12:481
1753476993127,3cyclictest1875041-21kworker/u8:0+flush-8:010:07:550
1753476993125,4cyclictest1870066-21kworker/u8:3+flush-8:010:17:390
1753476993125,4cyclictest1814466-21unixbench_singl08:07:550
1753476993125,4cyclictest1738001-21kworker/u8:2+events_unbound07:22:400
175348399303,21cyclictest1920222-21apt-get09:57:362
1753483993013,15cyclictest1834705-21cron08:30:002
175348399301,24cyclictest2064661-21ps12:22:422
175348399301,23cyclictest1865351-21apt-get09:02:362
1753480993026,3cyclictest1870066-21kworker/u8:3+events_unbound09:12:481
1753480993026,3cyclictest1800075-21kworker/u8:2+flush-8:008:02:551
1753480993025,3cyclictest2016831-21kthreadcore11:32:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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