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2026-04-04 - 23:11

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 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 50 highest latencies:
System rackeslot4s.osadl.org (updated Sat Apr 04, 2026 12:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1471551994942,4cyclictest509-21rs:main2
1471548994441,2cyclictest1649076-21kworker/u8:0+flush-259:012:20:191
1471551994338,4cyclictest1638617-21gpgv09:49:592
1471548994237,3cyclictest1675672-21/usr/sbin/munin10:25:141
1471546994137,3cyclictest1476953-21apt-get07:15:130
1471548994034,4cyclictest1556022-21diskstats08:30:131
1471556993936,2cyclictest1789601-21fwupd12:12:183
1471551993933,4cyclictest1607539-21kworker/u8:0+flush-259:009:20:152
1471556993832,4cyclictest1555176-21latency_hist08:30:003
1471548993835,2cyclictest1649076-21kworker/u8:0+flush-259:011:00:001
1471548993835,2cyclictest1607539-21kworker/u8:0+flush-259:009:20:231
1471548993834,3cyclictest1695948-21kworker/u8:1+flush-259:012:25:171
1471551993732,3cyclictest1314905-21kworker/u8:0+flush-259:007:45:182
1471548993734,2cyclictest1550050-21kworker/u8:3+events_unbound10:05:251
1471546993734,2cyclictest1550050-21kworker/u8:3+flush-259:009:05:160
1471548993633,2cyclictest1664731-21kworker/u8:2+flush-259:010:40:211
1471548993632,3cyclictest1418507-21kworker/u8:4+events_unbound07:25:241
1471551993529,4cyclictest1716675-21latency_hist11:05:012
1471548993532,2cyclictest1502450-21kworker/u8:2+flush-259:007:54:591
1471548993531,3cyclictest1695948-21kworker/u8:1+flush-259:011:30:201
1471546993532,2cyclictest1544624-21kworker/u8:1+flush-259:008:20:170
1471546993529,4cyclictest1696017-21latency_hist10:45:010
1471551993431,2cyclictest1502450-21kworker/u8:2+flush-259:007:59:592
1471548993428,3cyclictest1502450-21kworker/u8:2+flush-259:008:10:141
1471546993430,3cyclictest1502450-21kworker/u8:2+events_unbound08:45:020
1471548993330,2cyclictest1649076-21kworker/u8:0+flush-259:011:45:011
1471548993328,3cyclictest1779697-21/usr/sbin/munin12:05:201
1471548993328,3cyclictest1757989-21kworker/u8:2+events_unbound12:10:111
1471546993330,2cyclictest1314905-21kworker/u8:0+flush-259:007:20:170
1471556993225,5cyclictest1533933-21cp08:10:003
1471548993226,4cyclictest1649076-21kworker/u8:0+flush-259:011:20:261
1471546993228,3cyclictest1757989-21kworker/u8:2+events_unbound11:55:010
1471556993126,4cyclictest1550050-21kworker/u8:3+events_unbound10:00:243
1471548993125,4cyclictest1737564-21/usr/sbin/munin11:25:161
1471548993125,4cyclictest1492355-21apt-get07:30:111
1471546993128,2cyclictest1418507-21kworker/u8:4+flush-259:007:25:170
1471548993026,3cyclictest1582033-21apt-get08:55:111
1471548993026,3cyclictest1550050-21kworker/u8:3+flush-259:010:20:201
1471548993026,3cyclictest1314905-21kworker/u8:0+flush-259:007:35:271
1471548993025,3cyclictest1696248-21/usr/sbin/munin10:45:151
1471548993024,4cyclictest1502450-21kworker/u8:2+events_unbound08:40:231
1471546993026,3cyclictest1471770-21apt-get07:10:110
1471556992926,2cyclictest1550050-21kworker/u8:3+flush-259:008:45:243
1471556992924,4cyclictest1518585-21apt-get07:55:113
1471548992926,2cyclictest1628242-21kworker/u8:2+flush-259:009:55:181
1471548992926,2cyclictest1550050-21kworker/u8:3+events_unbound09:00:191
1471548992926,2cyclictest1523500-21kworker/u8:3+events_unbound08:15:141
1471546992926,2cyclictest1314905-21kworker/u8:0+flush-259:007:30:160
1471556992823,4cyclictest1555712-21base6408:30:013
1471556992820,6cyclictest1804552-21ntpq12:25:233
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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