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2026-06-11 - 09:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot4s.osadl.org (updated Thu Jun 11, 2026 00:44:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1739917993835,2cyclictest2061730-21kworker/u8:1+flush-259:000:25:183
1739907993833,4cyclictest1775512-21ntpq19:40:200
1739907993832,4cyclictest335557-21systemd-journal23:49:590
1739907993631,3cyclictest509-21rs:main0
1739912993428,4cyclictest2025550-21/usr/sbin/munin23:45:152
1739912993427,5cyclictest335557-21systemd-journal22:00:012
1739917993329,3cyclictest1921487-21kworker/u8:4+flush-259:022:55:013
1739912993327,4cyclictest1802585-21latency_hist20:10:012
1739912993326,5cyclictest1750605-21latency_hist19:20:002
1739907993329,3cyclictest335557-21systemd-journal19:47:370
1739917993226,4cyclictest2025311-21latency_hist23:45:003
1739912993126,3cyclictest1921487-21kworker/u8:4+flush-259:023:25:162
1739909993126,3cyclictest1921705-21apt-get22:05:111
1739907993125,4cyclictest2046027-21latency_hist00:05:000
1739917993026,3cyclictest1797162-21kworker/u8:3+flush-259:020:20:243
1739912993026,3cyclictest335557-21systemd-journal22:36:292
1739909993026,3cyclictest1978854-21kworker/u8:0+events_unbound23:30:231
1739909993025,4cyclictest335557-21systemd-journal22:11:241
1739909992922,5cyclictest1812025-21ntpq20:15:211
1739912992824,3cyclictest1921487-21kworker/u8:4+flush-259:000:20:152
1739912992822,4cyclictest1999626-21latency_hist23:20:012
1739912992821,5cyclictest1921446-21latency_hist22:05:002
1739907992824,3cyclictest2010112-21/usr/sbin/munin23:30:130
1739907992824,3cyclictest1895591-21apt-get21:40:110
1739917992723,3cyclictest1838974-21apt-get20:45:123
1739917992723,3cyclictest1782288-21apt-get19:50:123
1739912992721,4cyclictest335557-21systemd-journal22:45:002
1739909992723,3cyclictest1740121-21apt-get19:10:101
1739907992723,3cyclictest1859530-21apt-get21:05:130
1739917992621,4cyclictest335557-21systemd-journal23:00:373
1739912992621,3cyclictest1859279-21kworker/u8:1+events_unbound22:50:162
1739912992520,3cyclictest2051160-21sh00:09:592
1739907992522,2cyclictest1797162-21kworker/u8:3+flush-259:020:30:100
1739907992519,4cyclictest1943375-21cut22:25:150
1739912992420,3cyclictest1921487-21kworker/u8:4+events_unbound23:10:202
1739912992419,4cyclictest1905631-21kworker/u8:2+events_unbound21:50:182
1739909992419,4cyclictest2060641-21ntpq00:15:211
1739909992417,5cyclictest1968770-21latency_hist22:50:011
173990999240,17cyclictest1890192-21apt21:34:591
1739907992420,3cyclictest1797162-21kworker/u8:3+flush-259:020:40:130
1739909992318,4cyclictest1802625-21kworker/u8:0+flush-259:021:15:121
1739909992318,3cyclictest1787451-21apt-get19:55:121
1739909992317,5cyclictest1817168-21ntpq20:20:191
1739909992317,4cyclictest1905601-21http21:50:001
1739909992310,11cyclictest335557-21systemd-journal21:09:541
1739907992318,4cyclictest335557-21systemd-journal21:35:000
1739907992317,4cyclictest1978111-21ntpq22:55:210
1739907992317,4cyclictest1807741-21latency_hist20:15:020
1739917992218,3cyclictest2025330-21kworker/u8:2+flush-259:000:10:153
1739912992218,3cyclictest2031477-21kworker/u8:0+flush-259:023:55:162
1739912992218,3cyclictest1802625-21kworker/u8:0+flush-259:021:25:232
1739912992218,3cyclictest1771091-21kworker/u8:2+events_unbound19:45:212
1739912992217,4cyclictest1978854-21kworker/u8:0+flush-259:023:40:212
1739912992216,4cyclictest335557-21systemd-journal22:57:362
1739912992216,4cyclictest1937590-21/usr/sbin/munin22:20:132
1739912992216,4cyclictest1859279-21kworker/u8:1+events_unbound21:40:172
1739912992214,5cyclictest1905759-21cat21:50:002
1739909992217,4cyclictest1859279-21kworker/u8:1+flush-259:023:24:591
1739907992216,5cyclictest335557-21systemd-journal21:55:010
1739907992216,4cyclictest335557-21systemd-journal23:56:500
1739917992118,2cyclictest1895328-21latency_hist21:39:593
1739917992117,3cyclictest1921487-21kworker/u8:4+flush-259:023:25:253
1739917992116,3cyclictest1754926-21ntpq19:20:203
173991299215,9cyclictest2046031-21awk00:05:002
1739912992117,3cyclictest1859279-21kworker/u8:1+events_unbound22:10:142
1739912992116,4cyclictest2025330-21kworker/u8:2+flush-259:023:50:202
1739912992116,3cyclictest1797162-21kworker/u8:3+flush-259:020:30:002
1739912992115,4cyclictest1739867-21kworker/u8:3+flush-259:019:40:162
1739909992116,4cyclictest1947700-21kworker/u8:2+flush-259:022:35:211
1739917992014,4cyclictest1838715-21turbostat20:44:593
1739912992016,3cyclictest1916367-21kworker/u8:0+events_unbound22:10:012
1739912992016,3cyclictest1859279-21kworker/u8:1+flush-259:021:20:222
1739912992015,3cyclictest1777094-21kworker/u8:0+events_unbound19:55:162
1739912992015,3cyclictest1734957-21kworker/u8:2+events_unbound19:10:172
1739909992017,2cyclictest1921487-21kworker/u8:4+flush-259:022:25:151
1739909992015,3cyclictest1676225-21kworker/u8:0+flush-259:019:30:101
1739909992014,4cyclictest1833546-21latency_hist20:40:011
1739907992017,2cyclictest1859279-21kworker/u8:1+flush-259:022:50:210
1739907992016,3cyclictest1890179-21kworker/u8:3+flush-259:021:50:000
1739917991916,2cyclictest1797162-21kworker/u8:3+flush-259:020:30:203
1739917991915,2cyclictest0-21swapper/320:54:593
1739912991916,2cyclictest1978854-21kworker/u8:0+flush-259:023:05:212
1739912991915,3cyclictest2050982-21kworker/u8:1+flush-259:000:10:212
1739912991915,3cyclictest1859279-21kworker/u8:1+events_unbound23:20:222
1739912991914,4cyclictest2061730-21kworker/u8:1+flush-259:000:25:162
1739912991914,4cyclictest1797162-21kworker/u8:3+events_unbound20:20:202
1739912991913,4cyclictest1963180-21apt-get22:45:032
1739912991913,4cyclictest1734957-21kworker/u8:2+flush-259:019:20:152
1739912991912,5cyclictest335557-21systemd-journal23:05:002
173991299191,15cyclictest1-21systemd23:39:592
173990999199,9cyclictest1792988-21irqcore20:00:181
1739909991914,3cyclictest1818351-21apt-get20:25:101
1739907991916,2cyclictest490-21dbus-daemon22:45:010
1739907991914,4cyclictest1745532-21cat19:15:000
1739917991814,3cyclictest335557-21systemd-journal22:34:553
1739917991813,3cyclictest509-21rs:main3
173991299182,8cyclictest1874783-21munin-run21:19:592
1739912991814,3cyclictest2025330-21kworker/u8:2+events_unbound00:33:412
1739912991814,3cyclictest1916367-21kworker/u8:0+events_unbound22:15:222
173990999181,4cyclictest1916313-21cron22:00:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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