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2026-01-16 - 10:12
[ 290.152] (II) VESA: driver for VESA chipsets: vesa

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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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 50 highest latencies:
System rack5slot4s.osadl.org (updated Fri Jan 16, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1453957996644,8cyclictest1506253-21apt-get20:05:010
1453958996253,6cyclictest1536204-21latency_hist20:35:011
1453958996151,7cyclictest1481438-21latency_hist19:40:021
1453958996151,4cyclictest1457958-21kworker/u8:3+events_unbound19:10:191
1453957996141,13cyclictest1734956-21latency_hist23:55:010
1453958996055,3cyclictest1645961-21kworker/u8:2+events_unbound22:50:221
1453958996053,5cyclictest1457958-21kworker/u8:3+events_unbound23:15:131
1453958995952,5cyclictest1457958-21kworker/u8:3+events_unbound22:20:181
1453958995946,10cyclictest1610717-21latency_hist21:50:001
17382822580,3chrt0-21swapper/123:55:101
1453960995853,4cyclictest1739530-21kworker/u8:0+events_unbound00:25:032
1453958995853,3cyclictest1666096-21kworker/u8:0+events_unbound23:10:011
1453958995650,4cyclictest1516709-21kworker/u8:0+flush-8:020:25:201
1453958995632,16cyclictest286-21systemd-journal21:20:011
1453958995549,5cyclictest1645961-21kworker/u8:2+events_unbound22:55:041
1453958995549,4cyclictest1516709-21kworker/u8:0+events_unbound20:25:001
1453960995449,3cyclictest1467065-21kworker/u8:2+events_unbound19:55:032
1453958995446,6cyclictest1467065-21kworker/u8:2+flush-8:020:00:141
1453960995348,4cyclictest1457958-21kworker/u8:3+flush-8:023:35:052
1453960995337,4cyclictest1715108-21kworker/u8:2+flush-8:000:15:062
1453958995337,11cyclictest1774929-21latency_hist00:35:011
1453958995247,3cyclictest1630485-21kworker/u8:0+flush-8:022:15:051
1453958995247,3cyclictest1630485-21kworker/u8:0+flush-8:022:15:051
1453958995144,5cyclictest1457958-21kworker/u8:3+events_unbound22:45:031
1453960995045,4cyclictest1457958-21kworker/u8:3+events_unbound21:15:072
1453960995045,3cyclictest1457958-21kworker/u8:3+events_unbound19:35:112
1453958995046,3cyclictest1457958-21kworker/u8:3+events_unbound19:45:131
1453958995036,5cyclictest1536114-21kworker/u8:2+events_unbound20:40:211
1453960994944,4cyclictest1593054-21kworker/u8:2+events_unbound21:50:192
1453960994942,5cyclictest1516709-21kworker/u8:0+events_unbound20:45:062
1453958994944,4cyclictest1689622-21kworker/u8:1+flush-8:023:10:071
1453958994943,4cyclictest1457958-21kworker/u8:3+events_unbound00:00:211
1453958994844,3cyclictest1689622-21kworker/u8:1+events_unbound00:05:091
1453958994843,4cyclictest1516709-21kworker/u8:0+events_unbound21:05:191
1453958994841,5cyclictest1645961-21kworker/u8:2+events_unbound23:00:141
1453958994841,5cyclictest1593054-21kworker/u8:2+events_unbound22:05:011
1453958994841,5cyclictest1516709-21kworker/u8:0+events_unbound21:25:201
1453958994841,5cyclictest1457958-21kworker/u8:3+flush-8:023:55:011
1453958994838,7cyclictest1655596-21apt-get22:35:001
1453957994840,5cyclictest1779838-21latency_hist00:40:010
15324972470,7sleep20-21swapper/220:30:082
1453958994741,4cyclictest1457958-21kworker/u8:3+events_unbound23:20:041
1453958994739,6cyclictest1467065-21kworker/u8:2+events_unbound20:05:171
17264132460,5chrt371rcuc/223:45:092
1453960994642,3cyclictest1457958-21kworker/u8:3+flush-8:021:30:202
1453960994641,4cyclictest1516709-21kworker/u8:0+events_unbound21:20:142
1453960994641,3cyclictest1421348-21kworker/u8:1+events_unbound19:25:072
1453958994640,4cyclictest1457958-21kworker/u8:3+flush-8:021:35:141
1453958994640,4cyclictest1457958-21kworker/u8:3+flush-8:021:00:211
1453960994541,3cyclictest1421348-21kworker/u8:1+events_unbound20:10:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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