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2025-12-08 - 08:13

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 Mon Dec 08, 2025 00:45:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1545747991481,136cyclictest0-21swapper/021:25:030
154574799977,3cyclictest131rcu_preempt23:50:020
1545752997737,7cyclictest23-21ksoftirqd/100:00:011
1545747997431,6cyclictest306-21in:imuxsock22:30:010
1545747997431,6cyclictest306-21in:imuxsock22:30:010
154574799674,40cyclictest19050irq/34-mmc100:35:020
1545752996341,18cyclictest1-21systemd20:55:011
1545752996341,18cyclictest1-21systemd20:55:011
1545747996250,6cyclictest0-21swapper/021:45:020
1545747996227,9cyclictest1553245-21latency_hist21:35:010
1545747996227,9cyclictest1553245-21latency_hist21:35:010
1545752996040,16cyclictest1-21systemd20:20:011
1545752996037,13cyclictest1552431-21cron21:20:001
1545757995723,19cyclictest1553983-21kworker/u8:122:00:023
1545757995723,19cyclictest1553983-21kworker/u8:122:00:023
1545754995624,27cyclictest30-21ksoftirqd/221:10:002
1545754995624,27cyclictest30-21ksoftirqd/221:10:002
1545747995623,20cyclictest1547544-21kworker/0:020:30:020
1545757995523,19cyclictest1-21systemd19:25:013
1545752995442,8cyclictest23-21ksoftirqd/100:25:011
1545752995428,21cyclictest272-21dbus-daemon21:40:001
1545752995411,6cyclictest131rcu_preempt19:35:011
1545752995340,8cyclictest23-21ksoftirqd/121:35:011
1545752995340,8cyclictest23-21ksoftirqd/121:35:011
1545752995337,12cyclictest235-21systemd-journal19:14:591
154574799534,4cyclictest131rcu_preempt00:10:010
1545747995341,2cyclictest0-21swapper/021:15:020
1545757995234,15cyclictest1-21systemd20:45:013
1545752995211,7cyclictest131rcu_preempt22:25:021
1545747995246,4cyclictest0-21swapper/019:13:240
154575299519,7cyclictest23-21ksoftirqd/123:50:001
1545757995036,9cyclictest1-21systemd21:10:013
1545757995036,9cyclictest1-21systemd21:10:013
1545757995031,14cyclictest235-21systemd-journal20:15:003
1545754995036,10cyclictest1-21systemd22:55:012
1545754995035,11cyclictest235-21systemd-journal22:20:002
1545752995028,15cyclictest235-21systemd-journal23:15:011
1545747995042,5cyclictest16950irq/224-800000019:50:010
1545747995032,13cyclictest272-21dbus-daemon20:50:010
1545747994931,13cyclictest272-21dbus-daemon20:00:000
1545747994923,6cyclictest12-21ksoftirqd/021:20:020
154574799491,42cyclictest1559223-21kworker/0:200:00:020
154574799491,3cyclictest131rcu_preempt23:45:020
154574799491,3cyclictest131rcu_preempt23:45:020
1545752994813,5cyclictest131rcu_preempt20:15:001
154574799485,28cyclictest1550856-21kworker/u8:121:00:020
1545747994834,10cyclictest235-21systemd-journal00:35:030
1545757994734,10cyclictest1-21systemd22:40:013
1545757994732,12cyclictest235-21systemd-journal20:20:013
1545754994730,12cyclictest272-21dbus-daemon00:00:012
1545754994729,13cyclictest235-21systemd-journal21:25:012
154575499472,4cyclictest131rcu_preempt20:40:012
154575499472,4cyclictest131rcu_preempt20:40:012
154575499472,4cyclictest131rcu_preempt19:40:022
1545752994726,14cyclictest235-21systemd-journal23:45:011
1545752994726,14cyclictest235-21systemd-journal23:45:011
1545754994630,12cyclictest272-21dbus-daemon23:10:002
1545754994625,15cyclictest272-21dbus-daemon21:05:012
1545752994635,8cyclictest23-21ksoftirqd/122:50:001
1545752994618,6cyclictest131rcu_preempt23:00:011
1545752994618,6cyclictest131rcu_preempt23:00:011
1545752994612,6cyclictest131rcu_preempt22:00:001
1545752994612,6cyclictest131rcu_preempt22:00:001
154575299461,15cyclictest1551402-21munin-plugin-st21:00:001
1545752994611,5cyclictest131rcu_preempt22:30:001
1545752994611,5cyclictest131rcu_preempt22:30:001
154575299461,14cyclictest0-21swapper/100:26:001
1545747994631,12cyclictest1-21systemd23:55:010
1545747994631,11cyclictest12-21ksoftirqd/023:30:020
1545747994631,11cyclictest12-21ksoftirqd/023:30:020
154574799461,4cyclictest131rcu_preempt22:10:020
1545757994530,10cyclictest235-21systemd-journal21:45:013
1545757994528,14cyclictest272-21dbus-daemon22:25:013
154575799452,3cyclictest131rcu_preempt22:35:003
1545754994516,20cyclictest30-21ksoftirqd/223:20:012
1545752994533,6cyclictest23-21ksoftirqd/122:10:021
154575299452,6cyclictest131rcu_preempt21:00:021
1545752994511,6cyclictest131rcu_preempt22:45:011
1545752994511,6cyclictest131rcu_preempt22:45:011
154574799455,35cyclictest0-21swapper/021:40:010
1545747994530,11cyclictest235-21systemd-journal20:44:240
1545757994433,8cyclictest37-21ksoftirqd/322:30:023
1545757994433,8cyclictest37-21ksoftirqd/322:30:023
1545757994431,10cyclictest1559968-21sshd23:42:353
1545757994431,10cyclictest1559968-21sshd23:42:353
1545752994431,8cyclictest1546186-21cron19:20:011
1545752994413,6cyclictest131rcu_preempt20:40:011
1545752994413,6cyclictest131rcu_preempt20:40:011
1545757994329,11cyclictest37-21ksoftirqd/321:55:003
154575799431,3cyclictest131rcu_preempt19:40:023
1545754994336,5cyclictest30-21ksoftirqd/220:59:592
1545754994331,9cyclictest30-21ksoftirqd/200:25:012
1545754994323,14cyclictest272-21dbus-daemon00:20:012
1545752994332,6cyclictest306-21in:imuxsock21:55:001
1545752994331,7cyclictest1548259-21cron19:59:591
1545752994329,10cyclictest235-21systemd-journal20:45:261
1545752994314,6cyclictest131rcu_preempt19:39:591
1545747994331,7cyclictest1558417-21munin-plugin-st23:15:000
154574799432,8cyclictest1547183-21latency_hist19:35:030
1545754994231,7cyclictest1546406-21latency_hist19:20:032
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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