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2026-05-09 - 18:26
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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 Sat May 09, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
186538299111103,6cyclictest1952612-21kworker/u8:0+events_unbound12:25:001
18653789910398,3cyclictest1871897-21kworker/u8:1+events_unbound07:45:000
186537899992,95cyclictest1-21systemd10:15:000
1865378999891,4cyclictest1861527-21kworker/u8:1+events_unbound07:15:250
1865382999587,6cyclictest1954280-21kworker/u8:2+flush-179:011:50:251
1865382999587,6cyclictest1954280-21kworker/u8:2+flush-179:011:50:251
1865382999388,4cyclictest1904338-21kworker/u8:0+flush-179:009:40:261
1865382999387,4cyclictest1895868-21kworker/u8:2+flush-179:008:40:241
1865382999386,4cyclictest1962176-21kworker/u8:2+flush-179:012:30:241
1865378999286,4cyclictest1935156-21kworker/u8:2+events_unbound11:10:000
1865382999084,4cyclictest1943131-21kworker/u8:3+flush-179:011:50:001
1865378999080,6cyclictest1935131-21latency_hist10:45:000
1865382998882,5cyclictest1895868-21kworker/u8:2+flush-179:009:00:241
1865382998882,4cyclictest1952612-21kworker/u8:0+flush-179:012:05:251
1865382998674,4cyclictest1928797-21kworker/u8:0+events_unbound10:40:011
1865378998677,7cyclictest1954239-21latency_hist11:45:010
1865378998575,8cyclictest1213033-21systemd-journal12:40:000
1865382998479,4cyclictest1904338-21kworker/u8:0+flush-179:009:15:261
1865382998479,4cyclictest1881774-21kworker/u8:0+events_unbound08:00:251
1865378998374,7cyclictest1928999-21/usr/sbin/munin10:25:260
1865382998276,5cyclictest1943131-21kworker/u8:3+flush-179:011:10:241
1865382998275,5cyclictest1897976-21kworker/u8:0+flush-179:008:55:011
1865382998074,5cyclictest1865288-21kworker/u8:3+events_unbound07:30:261
1865382997974,4cyclictest1957415-21kworker/u8:1+flush-179:012:00:251
1865382997972,6cyclictest1877080-21kworker/u8:2+flush-179:007:45:231
186537899790,77cyclictest1-21systemd10:10:010
1865382997873,4cyclictest1865288-21kworker/u8:3+flush-179:007:40:011
1865378997770,5cyclictest1905977-21kworker/u8:3+flush-179:009:20:230
1865382997671,4cyclictest1928797-21kworker/u8:0+flush-179:011:05:201
1865382997658,17cyclictest1871897-21kworker/u8:1+flush-179:008:00:011
186537899760,73cyclictest1-21systemd09:05:010
1865382997570,4cyclictest1943131-21kworker/u8:3+flush-179:011:25:001
1865382997566,7cyclictest1943131-21kworker/u8:3+flush-179:011:15:201
1865378997568,4cyclictest1895868-21kworker/u8:2+flush-179:009:30:250
1865382997468,4cyclictest1943131-21kworker/u8:3+flush-179:011:55:161
1865378997467,5cyclictest1877080-21kworker/u8:2+flush-179:007:50:010
1865378997466,6cyclictest1870069-21apt-get07:25:030
1865382997367,5cyclictest1935156-21kworker/u8:2+events_unbound10:55:141
1865382997365,6cyclictest1915383-21kworker/u8:3+flush-179:009:50:211
1865382997364,4cyclictest1928797-21kworker/u8:0+events_unbound10:50:131
1865382997268,3cyclictest1928797-21kworker/u8:0+events_unbound10:30:231
1865382997267,3cyclictest1935156-21kworker/u8:2+events_unbound11:30:141
1865382997267,3cyclictest1868352-21kworker/u8:2+flush-179:007:25:111
1865382997266,4cyclictest1925565-21kworker/u8:3+flush-179:010:15:191
1865382997265,6cyclictest1951021-21kworker/u8:1+events_unbound11:35:251
1865382997264,6cyclictest1915383-21kworker/u8:3+flush-179:009:55:211
1865378997266,4cyclictest1904338-21kworker/u8:0+events_unbound09:15:250
1865378997265,5cyclictest1885023-21kworker/u8:3+flush-179:008:30:160
186537899720,70cyclictest1-21systemd09:00:000
1865382997160,8cyclictest1213033-21systemd-journal10:50:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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