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2025-11-30 - 04:45

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 Sun Nov 30, 2025 00:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
561323991321,4cyclictest0-21swapper/000:00:020
56133099777,45cyclictest291rcuc/219:55:032
561323995521,15cyclictest131rcu_preempt21:48:310
561326995440,8cyclictest561333-21grep19:10:011
561326995428,17cyclictest272-21dbus-daemon21:40:011
561326995428,17cyclictest272-21dbus-daemon21:40:001
56132699524,7cyclictest23-21ksoftirqd/122:50:011
56133599514,6cyclictest131rcu_preempt00:15:013
561326995119,20cyclictest23-21ksoftirqd/123:25:021
56132399513,30cyclictest151rcuc/019:55:020
56133599504,6cyclictest131rcu_preempt00:30:013
56132399501,7cyclictest131rcu_preempt20:15:000
56133599492,5cyclictest131rcu_preempt19:30:023
56133099491,7cyclictest131rcu_preempt00:00:022
561323994934,11cyclictest272-21dbus-daemon19:20:000
561323994934,11cyclictest235-21systemd-journal20:21:300
561323994929,14cyclictest235-21systemd-journal19:34:590
561323994922,14cyclictest12-21ksoftirqd/000:10:010
56132399491,2cyclictest0-21swapper/022:15:020
561323994911,34cyclictest12-21ksoftirqd/020:50:020
56133599483,5cyclictest131rcu_preempt23:40:013
561335994831,13cyclictest272-21dbus-daemon20:25:013
561335994824,21cyclictest37-21ksoftirqd/321:45:013
56133599481,5cyclictest131rcu_preempt21:40:013
56133599481,5cyclictest131rcu_preempt21:40:013
56133099481,3cyclictest131rcu_preempt23:40:002
56132699486,6cyclictest131rcu_preempt22:10:031
561326994831,13cyclictest272-21dbus-daemon22:55:011
56132699481,5cyclictest131rcu_preempt20:01:001
561323994830,13cyclictest235-21systemd-journal23:00:000
56133599474,6cyclictest570064-21latency_hist21:55:033
56133599474,33cyclictest361rcuc/323:30:023
56133599471,5cyclictest131rcu_preempt22:45:023
56133599471,5cyclictest131rcu_preempt20:40:003
561330994733,10cyclictest1-21systemd21:10:002
56132699479,4cyclictest131rcu_preempt19:35:011
561326994736,7cyclictest23-21ksoftirqd/100:10:021
561326994734,7cyclictest567305-21munin-plugin-st21:05:001
56132399476,30cyclictest19050irq/34-mmc119:45:020
56132399471,42cyclictest5740371sshd23:13:260
56133599469,8cyclictest37-21ksoftirqd/321:10:013
56133599467,6cyclictest131rcu_preempt23:10:033
561335994627,14cyclictest235-21systemd-journal22:40:013
56133599462,5cyclictest131rcu_preempt22:00:013
561335994622,7cyclictest575900-21kworker/3:200:00:113
56133599461,5cyclictest131rcu_preempt20:05:013
561335994615,23cyclictest272-21dbus-daemon00:10:013
561326994633,8cyclictest567561-21cron21:10:001
561326994630,11cyclictest272-21dbus-daemon00:00:001
561326994628,13cyclictest272-21dbus-daemon23:40:011
561326994627,14cyclictest272-21dbus-daemon00:05:011
561326994625,12cyclictest306-21in:imuxsock19:40:011
561326994625,12cyclictest306-21in:imuxsock19:40:001
561326994624,15cyclictest568094-21run-parts21:20:001
561326994614,20cyclictest131rcu_preempt19:30:001
56132399462,3cyclictest131rcu_preempt22:40:010
56132399462,3cyclictest131rcu_preempt00:31:550
56132399462,3cyclictest131rcu_preempt00:31:550
561323994623,4cyclictest12-21ksoftirqd/023:30:020
56132399462,13cyclictest570174-21sendmail22:00:010
56133599454,5cyclictest131rcu_preempt20:20:033
561335994537,5cyclictest37-21ksoftirqd/323:45:023
561335994529,11cyclictest37-21ksoftirqd/300:00:003
561335994520,20cyclictest37-21ksoftirqd/323:32:313
561335994520,20cyclictest37-21ksoftirqd/323:32:313
56133599451,5cyclictest131rcu_preempt19:55:003
56133599451,15cyclictest0-21swapper/323:05:013
56133099453,3cyclictest131rcu_preempt23:45:002
561330994532,10cyclictest572556-21sed22:45:012
56133099451,6cyclictest0-21swapper/220:00:002
56133099451,6cyclictest0-21swapper/219:59:592
561326994537,6cyclictest23-21ksoftirqd/121:00:021
561326994537,6cyclictest23-21ksoftirqd/121:00:011
561326994525,9cyclictest306-21in:imuxsock00:40:011
561326994524,9cyclictest306-21in:imuxsock21:15:001
561326994515,6cyclictest131rcu_preempt22:15:001
56132399455,6cyclictest131rcu_preempt20:40:010
561323994529,13cyclictest575327-21sshd23:36:310
561335994428,12cyclictest272-21dbus-daemon21:00:013
561335994428,12cyclictest272-21dbus-daemon21:00:013
561335994423,5cyclictest37-21ksoftirqd/322:10:013
561335994421,19cyclictest37-21ksoftirqd/323:15:013
561335994420,5cyclictest37-21ksoftirqd/323:00:013
561335994419,20cyclictest361rcuc/319:20:023
561330994435,5cyclictest0-21swapper/219:10:022
56132699447,30cyclictest575108-21cut23:35:011
56132699447,30cyclictest575108-21cut23:35:011
561326994431,7cyclictest306-21in:imuxsock20:35:021
561326994425,13cyclictest1-21systemd22:30:011
561326994414,7cyclictest131rcu_preempt19:45:001
561326994414,6cyclictest131rcu_preempt19:15:021
561326994413,6cyclictest131rcu_preempt20:35:011
561323994429,11cyclictest0-21swapper/000:00:060
561323994427,13cyclictest1-21systemd22:45:010
561323994422,15cyclictest235-21systemd-journal22:04:590
561323994420,19cyclictest12-21ksoftirqd/022:30:000
56132399441,3cyclictest131rcu_preempt00:40:000
56133599438,6cyclictest131rcu_preempt21:46:223
56133599434,7cyclictest37-21ksoftirqd/319:15:033
56133599433,5cyclictest131rcu_preempt22:20:313
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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