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2025-12-14 - 03:07

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 Dec 14, 2025 00:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17968452870,2sleep3575-21kworker/3:2-events23:54:173
15768632830,5sleep3451irq_work/320:14:063
15229832500,5chrt0-21swapper/119:19:201
1513581995041,6cyclictest278-21systemd-journal21:14:071
1513578994943,4cyclictest1733060-21kworker/u8:1+events_unbound23:09:170
1513578994828,18cyclictest1549314-21ntpq19:44:110
16619222450,2sleep3471rcuc/321:39:083
1513581994533,9cyclictest278-21systemd-journal21:29:061
1513578994516,15cyclictest0-21swapper/019:59:010
1513581994436,5cyclictest278-21systemd-journal20:39:061
1513578994427,15cyclictest1786573-21ntpq23:44:100
1513581994334,6cyclictest1727899-21latency_hist22:45:011
1513578994319,21cyclictest1653796-21latency_hist21:30:010
1513581994234,6cyclictest1559765-21kworker/u8:2+flush-8:020:29:021
1513581994233,6cyclictest1628877-21latency_hist21:05:001
1513578994227,13cyclictest1688207-21cron22:04:590
1513578994227,13cyclictest1688207-21cron22:04:590
1513578994221,19cyclictest1732934-21unixbench_singl22:49:170
1513584994137,3cyclictest1762632-21kworker/u8:0+events_unbound00:14:172
1513584994135,4cyclictest1663614-21kworker/u8:3+flush-8:022:20:362
1513584994134,5cyclictest278-21systemd-journal19:45:002
1513581994130,8cyclictest1554839-21awk19:50:001
151357899412,38cyclictest0-21swapper/021:58:560
1513578994119,19cyclictest1535975-21diskstats19:34:030
1513578994033,5cyclictest1574387-21grep20:09:190
1513578994031,7cyclictest1792117-21latency_hist23:50:010
1513584993934,4cyclictest1584392-21kworker/u8:0+flush-8:021:10:062
1513584993933,4cyclictest1703274-21kworker/u8:0+events_unbound22:35:012
1513578993923,14cyclictest1796913-21unixbench_singl23:54:170
1513578993917,21cyclictest1699579-21sshd22:19:060
1513581993828,8cyclictest1633920-21cp21:10:011
151357899382,9cyclictest1708730-21acpi22:28:580
15387192370,3sleep20-21swapper/219:34:092
1513578993722,14cyclictest1812684-21cpuspeed_turbos00:14:020
1513578993719,15cyclictest278-21systemd-journal20:14:010
1513584993631,3cyclictest1817069-21kworker/u8:3+events_unbound00:20:112
1513581993629,5cyclictest1584392-21kworker/u8:0+flush-8:021:49:111
1513578993617,17cyclictest1599057-21unixbench_singl20:34:210
1513578993615,19cyclictest1518117-21switchtime19:14:130
1513578993612,9cyclictest1531038-21diskstats19:29:020
1513584993530,4cyclictest1747558-21kworker/u8:2+flush-8:000:04:122
1513584993530,3cyclictest1733060-21kworker/u8:1+flush-8:023:59:192
1513584993530,3cyclictest1733060-21kworker/u8:1+flush-8:023:59:192
1513581993527,5cyclictest1559616-21grep19:54:191
1513581993526,6cyclictest278-21systemd-journal22:09:061
1513578993520,13cyclictest907-21mta-sts-daemon00:10:000
1513584993428,4cyclictest1644179-21kworker/u8:1+events_unbound22:00:072
1513584993428,4cyclictest1644179-21kworker/u8:1+events_unbound22:00:072
1513581993429,3cyclictest1679625-21irqrtprio21:59:041
1513581993429,3cyclictest1549936-21cron19:45:001
1513581993427,5cyclictest1644179-21kworker/u8:1+flush-8:021:39:031
1513578993422,9cyclictest278-21systemd-journal20:19:010
1513578993419,13cyclictest0-21swapper/000:24:120
1513578993418,14cyclictest0-21swapper/022:09:020
1513578993417,15cyclictest0-21swapper/021:14:180
1513578993416,16cyclictest0-21swapper/021:24:150
1513578993415,16cyclictest278-21systemd-journal23:25:000
1513578993414,18cyclictest1827581-21tr00:29:010
1513578993414,18cyclictest1747821-21turbostat.cron23:05:000
1513578993413,2cyclictest0-21swapper/019:50:010
151357899341,31cyclictest1623782-21munin-run21:00:000
15133382343,9sleep20-21swapper/219:09:272
15133382343,9sleep20-21swapper/219:09:272
1513581993323,8cyclictest1752100-21ntpq23:09:111
151357899332,10cyclictest1613289-21ntpq20:49:150
1513578993318,13cyclictest0-21swapper/021:49:070
1513578993317,14cyclictest0-21swapper/019:15:030
1513578993316,16cyclictest1757556-21unixbench_multi23:14:190
1513578993316,15cyclictest0-21swapper/000:39:190
1513578993314,2cyclictest0-21swapper/021:35:010
1513578993314,17cyclictest0-21swapper/022:24:060
1513584993228,3cyclictest1559765-21kworker/u8:2+events_unbound20:20:012
1513584993227,3cyclictest1817069-21kworker/u8:3+events_unbound00:35:062
1513581993226,4cyclictest1585655-21irqrtprio20:24:051
1513581993226,4cyclictest1530493-21kworker/u8:1+flush-8:019:59:031
1513581993225,5cyclictest1688246-21apt-get22:05:001
1513581993225,5cyclictest1688246-21apt-get22:05:001
1513581993222,6cyclictest278-21systemd-journal19:26:001
151357899323,7cyclictest1677750-21ntpq21:54:120
1513578993214,17cyclictest1713638-21acpi22:33:590
1513578993212,16cyclictest576-21runrttasks21:39:000
1513581993126,3cyclictest1703233-21idleruntime-cro22:20:001
1513581993124,5cyclictest1644179-21kworker/u8:1+events_unbound22:14:061
1513581993124,5cyclictest1530493-21kworker/u8:1+flush-8:020:04:061
151357899311,9cyclictest1737343-21ntpq22:54:110
151357899311,9cyclictest1603403-21ntpq20:39:120
1513578993117,12cyclictest0-21swapper/020:04:070
1513578993115,14cyclictest0-21swapper/023:34:010
1513578993114,16cyclictest1633181-21runrttasks21:09:130
1513578993114,15cyclictest1758593-21cut23:19:010
1513578993114,15cyclictest0-21swapper/000:34:030
1513578993112,4cyclictest1557087-21kthreadcore19:54:080
1513578993111,3cyclictest0-21swapper/023:57:060
1513578993111,3cyclictest0-21swapper/023:57:050
151357899311,11cyclictest1604620-21apt-get20:43:590
151357899310,6cyclictest1723012-21sendmail22:40:000
1513584993026,3cyclictest1559765-21kworker/u8:2+flush-8:019:59:132
1513581993025,3cyclictest1729412-21irqrtprio22:49:051
1513581993024,4cyclictest1663614-21kworker/u8:3+flush-8:022:24:101
151357899309,7cyclictest1614832-21ls20:54:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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