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2025-12-09 - 08:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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 100 highest latencies:
System rackeslot3s.osadl.org (updated Tue Dec 09, 2025 00:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16717489911034,14cyclictest131rcu_preempt21:45:033
16717489911034,14cyclictest131rcu_preempt21:45:023
1671738998113,3cyclictest131rcu_preempt22:15:021
1671745998025,10cyclictest272-21dbus-daemon21:30:012
1671745998025,10cyclictest272-21dbus-daemon21:30:012
167174599777,66cyclictest1680808-21unin-run22:05:002
1671733997325,44cyclictest1679923-21sed21:45:030
1671733997325,44cyclictest1679923-21sed21:45:020
1671745997027,8cyclictest1676864-21sshd20:49:282
1671745997027,8cyclictest1676864-21sshd20:49:282
1671745996831,12cyclictest1-21systemd23:40:012
1671733996621,40cyclictest1-21systemd00:00:000
167173399652,17cyclictest1683350-21sshd22:52:420
167173399642,16cyclictest1681049-21munin-run22:10:000
1671745996322,11cyclictest30-21ksoftirqd/220:22:282
1671733996323,33cyclictest1674277-21systemctl20:00:000
1671733996321,38cyclictest12-21ksoftirqd/023:27:480
1671733996311,14cyclictest1685972-21cron23:45:000
1671745996225,5cyclictest1686772-21sendmail-msp00:00:002
1671745996123,11cyclictest30-21ksoftirqd/222:10:002
167173399612,15cyclictest48-21kcompactd000:05:000
167173399612,15cyclictest1675608-21munin-run20:25:010
1671745996029,4cyclictest1-21systemd00:05:002
167173399602,15cyclictest1676098-21munin-run20:35:000
1671733996020,33cyclictest1-21systemd22:15:010
1671733996020,33cyclictest1-21systemd22:15:010
167173399601,5cyclictest1687530-21latency_hist00:14:590
1671745995826,8cyclictest1682351-21systemd-run22:35:002
1671733995822,31cyclictest1685707-21sh23:40:010
1671745995723,7cyclictest1678705-21sshd21:24:282
167173399578,9cyclictest272-21dbus-daemon00:10:010
167173399578,9cyclictest272-21dbus-daemon00:10:010
1671733995753,2cyclictest0-21swapper/023:00:020
167173399572,26cyclictest1686440-21latency_hist23:50:020
1671733995718,34cyclictest1-21systemd20:45:010
1671733995711,7cyclictest0-21swapper/021:45:280
167173399571,15cyclictest1673360-21cat19:40:010
1671748995612,13cyclictest37-21ksoftirqd/300:40:013
1671745995626,10cyclictest30-21ksoftirqd/222:15:002
1671745995626,10cyclictest30-21ksoftirqd/222:15:002
1671733995620,32cyclictest0-21swapper/021:52:380
1671733995617,4cyclictest0-21swapper/023:15:020
167173399561,16cyclictest1-21systemd21:05:010
1671733995517,6cyclictest12-21ksoftirqd/022:25:250
1671733995517,6cyclictest12-21ksoftirqd/022:25:250
1671733995513,9cyclictest306-21in:imuxsock23:17:000
167173399542,16cyclictest1682602-21munin-run22:40:000
1671733995420,8cyclictest12-21ksoftirqd/021:15:010
167173399541,49cyclictest0-21swapper/019:53:020
1671733995325,24cyclictest1679612-21latency_hist21:40:020
167173399532,16cyclictest272-21dbus-daemon20:55:000
167173399532,11cyclictest235-21systemd-journal00:25:000
1671748995235,12cyclictest1-21systemd23:45:003
1671748995218,26cyclictest37-21ksoftirqd/322:15:023
1671748995218,26cyclictest37-21ksoftirqd/322:15:023
1671748995214,5cyclictest131rcu_preempt20:25:013
1671738995234,14cyclictest235-21systemd-journal20:05:001
167174899511,9cyclictest1674804-21true20:10:013
167173399513,17cyclictest1684951-21munin-run23:25:010
1671733995123,25cyclictest12-21ksoftirqd/021:10:010
1671733995118,8cyclictest12-21ksoftirqd/021:33:280
1671748995031,13cyclictest1-21systemd21:50:003
1671748995012,6cyclictest131rcu_preempt20:30:023
1671745995034,11cyclictest235-21systemd-journal20:55:002
167174599501,4cyclictest131rcu_preempt23:00:002
167174599501,4cyclictest131rcu_preempt23:00:002
167173399506,8cyclictest1671737-21latency_hist19:10:020
167173399503,13cyclictest1672478-21grep19:25:000
1671733995022,24cyclictest1680975-21latency_hist22:05:030
1671733995016,4cyclictest1674543-21latency_hist20:05:020
1671733995015,12cyclictest1672166-21sshd19:17:170
1671733995014,7cyclictest1689028-21date00:40:020
1671748994935,9cyclictest1683633-21latency_hist23:00:003
1671748994935,9cyclictest1683633-21latency_hist23:00:003
1671748994926,17cyclictest37-21ksoftirqd/320:20:003
1671745994936,9cyclictest1687505-21sshd00:12:292
1671745994933,12cyclictest1682601-21run-parts22:40:002
1671745994932,13cyclictest272-21dbus-daemon21:15:012
1671733994930,15cyclictest235-21systemd-journal00:20:010
1671733994913,7cyclictest1683858-21date23:00:020
167174899483,5cyclictest131rcu_preempt19:25:003
1671748994831,13cyclictest1677903-21cron21:10:003
167174599485,4cyclictest131rcu_preempt00:35:002
167173399483,8cyclictest1675310-21modprobe20:20:000
167173399483,14cyclictest235-21systemd-journal22:20:000
1671733994819,4cyclictest1672690-21kworker/u8:219:30:000
1671733994816,8cyclictest12-21ksoftirqd/019:47:270
1671733994813,7cyclictest1678975-21cut21:30:010
1671733994813,7cyclictest1678975-21cut21:30:010
167173399481,2cyclictest0-21swapper/023:55:020
1671733994810,9cyclictest1-21systemd21:00:000
167174899474,7cyclictest131rcu_preempt00:20:013
167174599474,5cyclictest0-21swapper/221:45:022
167174599474,5cyclictest0-21swapper/221:45:022
1671738994734,9cyclictest1-21systemd23:35:011
1671738994731,11cyclictest272-21dbus-daemon19:45:011
1671738994731,11cyclictest272-21dbus-daemon19:45:011
1671733994717,7cyclictest235-21systemd-journal20:15:010
1671733994717,7cyclictest235-21systemd-journal20:15:010
167174899462,5cyclictest131rcu_preempt20:50:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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