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2026-05-08 - 05:55
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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6.osadl.org (updated Fri May 08, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
18938409910093,5cyclictest1908381-21kworker/u8:2+events_unbound20:10:000
1893844999284,6cyclictest1968061-21apt-get23:00:031
1893840999084,3cyclictest1988226-21kworker/u8:1+flush-179:000:20:010
1893844998980,6cyclictest1903597-21latency_hist19:40:021
1893844998881,5cyclictest1948086-21kworker/u8:3+flush-179:022:00:001
1893840998578,4cyclictest1958479-21kworker/u8:0+events_unbound22:50:250
1893844998170,8cyclictest1986066-21latency_hist23:55:011
1893840998172,6cyclictest1983130-21kworker/u8:0+events_unbound23:45:140
1893840998110,69cyclictest1937571-21unin-run21:25:000
1893840998068,4cyclictest1988226-21kworker/u8:1+events_unbound00:05:000
1893840998063,6cyclictest1986101-21kworker/u8:3+flush-179:000:10:150
1893840997972,4cyclictest1908381-21kworker/u8:2+events_unbound20:55:140
1893840997971,5cyclictest1961641-21kworker/u8:1+events_unbound22:55:150
1893840997873,4cyclictest1911587-21kworker/u8:1+flush-179:020:10:250
1893840997867,9cyclictest1986323-21apt-get23:55:130
1893840997771,4cyclictest1911587-21kworker/u8:1+flush-179:020:20:010
1893840997770,5cyclictest1958479-21kworker/u8:0+events_unbound22:40:140
1893840997668,5cyclictest1945521-21kworker/u8:1+flush-179:022:15:280
1893840997567,5cyclictest1926415-21kworker/u8:0+flush-179:021:45:210
1893840997564,8cyclictest1981487-21cat23:40:020
1893840997467,5cyclictest1971482-21latency_hist23:10:010
1893840997464,8cyclictest1908585-21/usr/sbin/munin19:55:240
1893844997363,8cyclictest1898803-21apt-get19:25:121
1893844997362,9cyclictest1895606-21apt-get19:15:141
1893850997270,1cyclictest0-21swapper/322:49:593
1893840997266,4cyclictest1874457-21kworker/u8:1+flush-179:019:20:010
1893840997265,5cyclictest1958479-21kworker/u8:0+events_unbound22:45:240
1893840997262,7cyclictest1921080-21kworker/u8:1+flush-179:020:40:140
1893844997061,7cyclictest1948921-21/usr/sbin/munin22:00:241
1893844997056,11cyclictest1990944-21kworker/u8:2+flush-179:000:15:011
1893840997064,4cyclictest1903586-21kworker/u8:0+flush-179:019:45:220
1893840997061,7cyclictest1988226-21kworker/u8:1+flush-179:000:10:010
1893840997057,5cyclictest1943195-21kworker/u8:2+flush-179:022:25:140
1893840996964,3cyclictest1926416-21kworker/u8:3+events_unbound21:25:250
1893840996963,4cyclictest1908381-21kworker/u8:2+flush-179:020:39:550
1893840996961,6cyclictest1960074-21latency_hist22:35:010
1893840996961,6cyclictest1892276-21kworker/u8:2+events_unbound19:35:020
1893840996961,5cyclictest1966476-21kworker/u8:3+flush-179:023:25:140
1893844996857,7cyclictest1908381-21kworker/u8:2+flush-179:020:40:001
1893840996861,5cyclictest1998916-21kworker/u8:2+events_unbound00:40:000
1893840996854,5cyclictest1958536-21kworker/u8:3+events_unbound22:35:160
1893840996757,7cyclictest1921080-21kworker/u8:1+flush-179:020:45:200
1893840996659,5cyclictest1926416-21kworker/u8:3+flush-179:021:05:210
1893840996555,7cyclictest1976300-21kworker/u8:1+flush-179:023:50:170
1893844996451,10cyclictest1213033-21systemd-journal23:45:011
1893840996459,3cyclictest191rcuc/019:35:000
1893840996457,4cyclictest1874457-21kworker/u8:1+events_unbound19:20:150
1893844996355,6cyclictest1932246-21apt-get21:10:001
1893840996356,5cyclictest1917915-21kworker/u8:0+flush-179:020:30:210
1893840996355,6cyclictest1945521-21kworker/u8:1+flush-179:022:05:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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