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2026-01-11 - 23:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, slot #7

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.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackfslot7s.osadl.org (updated Sun Jan 11, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18905292176145,28sleep10-21swapper/119:09:041
18905202149104,27sleep20-21swapper/219:08:572
18904182147117,25sleep00-21swapper/019:07:400
18905012145100,26sleep30-21swapper/319:08:423
189078799290,19cyclictest1912343-21cat20:15:021
189078799241,19cyclictest1970678-21ntpq23:15:171
189078799241,11cyclictest1922499-21irqstats20:45:141
189078599246,9cyclictest1971495-21awk23:19:590
189078599241,5cyclictest1904028-21munin-run19:50:000
1890785992415,7cyclictest1962012-21awk22:50:010
189078799239,12cyclictest1984399-21apt-get00:00:001
189078799238,3cyclictest1934852-21apt-get21:25:011
1890787992312,7cyclictest1927154-21packagekitd21:00:011
189078799231,12cyclictest1946981-21ntpq22:00:181
189078799231,11cyclictest1906580-21python319:55:211
189078799230,15cyclictest0-21swapper/119:35:151
1890785992318,3cyclictest0-21swapper/020:40:000
1890795992217,3cyclictest1920348-21idleruntime-cro20:39:593
189078799228,11cyclictest1913168-21python320:15:221
189078799221,11cyclictest1955085-21python322:25:201
189078799221,10cyclictest1950130-21ntpq22:10:181
189078799221,10cyclictest1937524-21ntpq21:30:181
189078799221,10cyclictest1930112-21munin-run21:09:591
189078799220,19cyclictest1986553-21apt-get00:05:131
189078799220,16cyclictest1941927-21diskstats21:45:141
189078799220,12cyclictest1946292-21cat22:00:001
1890785992218,2cyclictest1908997-21kworker/u16:0-events_unbound20:20:010
1890795992118,2cyclictest0-21swapper/323:15:163
1890790992117,2cyclictest1926688-21idleruntime-cro20:59:592
1890790992117,2cyclictest1926688-21idleruntime-cro20:59:592
1890790992117,2cyclictest0-21swapper/219:30:002
1890790992115,4cyclictest1941453-21idleruntime-cro21:44:592
1890787992117,2cyclictest659-21in:imuxsock00:17:241
1890787992112,8cyclictest1935073-21latency_hist21:25:011
189078799211,18cyclictest1892286-21perf19:15:011
189078799211,17cyclictest1952511-21dump-pmu-power22:20:001
189078799211,16cyclictest1920364-21perf20:40:001
189078799211,11cyclictest1975758-21ntpq23:30:191
189078799210,17cyclictest0-21swapper/100:00:021
1890785992113,6cyclictest1939875-21systemctl21:40:000
189078599211,12cyclictest1900861-21munin-run19:40:000
189079599201,3cyclictest1926956-21apt-config21:00:003
189079599201,3cyclictest1926956-21apt-config21:00:003
1890795992012,6cyclictest1941447-21sh21:44:593
189079099209,8cyclictest1971488-21systemctl23:20:002
1890790992017,2cyclictest661-21rs:main2
1890790992016,3cyclictest421ktimers/220:05:182
1890790992011,6cyclictest645-21dbus-daemon19:40:012
189079099201,16cyclictest1962018-21idleruntime-cro22:50:002
189078799201,9cyclictest1973884-21ntpq23:25:171
189078799201,9cyclictest1926077-21python320:55:191
189078799201,9cyclictest1926077-21python320:55:181
1890787992014,1cyclictest1952764-21/usr/sbin/munin22:20:131
189078799201,17cyclictest1914562-21ntpq20:20:181
189078799201,16cyclictest1979675-21idleruntime-cro23:44:591
189078799201,16cyclictest1931689-21awk21:14:591
189078799200,8cyclictest1940336-21cstates21:40:121
189078799200,17cyclictest1961197-21ntpq22:45:171
189078599208,5cyclictest1926683-21perf21:00:000
189078599208,5cyclictest1926683-21perf21:00:000
1890785992015,3cyclictest0-21swapper/020:10:010
189079599191,15cyclictest13236-21gnome-shell20:46:593
189079599190,18cyclictest13236-21gnome-shell19:15:583
1890790991916,2cyclictest1992673-21systemd-run00:25:012
1890790991915,3cyclictest421ktimers/200:25:132
189078799199,8cyclictest1959709-21/usr/sbin/munin22:40:191
189078799198,9cyclictest1896315-21df19:25:121
189078799191,15cyclictest1993553-21meminfo00:25:161
189078799191,15cyclictest1944621-21basename21:55:011
189078799191,15cyclictest1902453-21munin-run19:45:001
189078799191,13cyclictest1972253-21ntpq23:20:161
189078799191,13cyclictest1957734-21diskstats22:35:201
189078799191,10cyclictest1991837-21ntpq00:20:171
189078799191,10cyclictest1967738-21python323:05:221
189078799190,18cyclictest1980947-21seq23:46:271
189078799190,17cyclictest1977965-21taskset23:38:531
189078599199,2cyclictest191rcu_preempt22:00:190
189078599195,5cyclictest16-21ksoftirqd/022:30:010
1890785991913,5cyclictest1938287-21awk21:34:590
1890785991912,5cyclictest1901530-21memory19:40:150
1890785991912,2cyclictest191rcu_preempt21:50:010
1890785991912,2cyclictest191rcu_preempt20:35:000
1890785991910,7cyclictest753-21ntpd23:55:160
189078599190,17cyclictest1994264-21taskset00:27:310
189079599184,6cyclictest1992761-10apt-config00:25:013
1890795991815,2cyclictest645-21dbus-daemon00:00:013
1890795991813,3cyclictest0-21swapper/321:19:593
1890795991811,5cyclictest1946171-21cron22:00:013
189079599180,4cyclictest1955439-21runrttasks22:27:093
189079599180,16cyclictest1964236-21/usr/sbin/munin22:55:163
189079099187,5cyclictest1948601-10ld22:05:182
189079099187,5cyclictest1908019-10ld20:00:202
189079099181,9cyclictest1915358-21munin-run20:25:012
1890790991813,3cyclictest1892011-21seq19:11:502
1890790991813,3cyclictest13485-21evolution-alarm23:59:592
1890790991812,5cyclictest13248-21gdbus20:35:062
189079099180,16cyclictest1957921-21/usr/sbin/munin22:35:222
189078799186,10cyclictest1910334-21sh20:10:001
189078799181,9cyclictest1895263-21python319:20:181
1890787991811,4cyclictest1988509-21/usr/sbin/munin00:10:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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