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2025-09-17 - 17:40

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 50 highest latencies:
System rackeslot3s.osadl.org (updated Wed Sep 17, 2025 12:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
402802499941,61cyclictest0-21swapper/308:05:023
4028015997335,32cyclictest4036768-21sh10:00:001
402801599704,21cyclictest4030534-21modprobe08:00:001
402801599704,21cyclictest4030534-21modprobe08:00:001
4028015996728,34cyclictest4042748-21munin-plugin-st11:55:001
4028015996723,37cyclictest23-21ksoftirqd/108:30:001
4028015996722,12cyclictest23-21ksoftirqd/110:30:011
4028015996722,12cyclictest23-21ksoftirqd/110:30:011
4028015996618,12cyclictest4037099-21sed10:05:021
4028010996429,31cyclictest4039580-21cat10:50:020
402801599638,10cyclictest4033646-21modprobe09:00:011
4028015996327,10cyclictest23-21ksoftirqd/107:24:591
4028015996321,8cyclictest4028443-21sshd07:18:281
4028015996321,8cyclictest4028443-21sshd07:18:281
4028015996319,6cyclictest306-21in:imuxsock11:50:011
4028015996319,6cyclictest306-21in:imuxsock11:50:011
4028024996213,8cyclictest37-21ksoftirqd/307:20:003
4028024996213,8cyclictest37-21ksoftirqd/307:19:593
4028015996221,15cyclictest272-21dbus-daemon08:50:001
4028015996220,6cyclictest4041756-21latency_hist11:35:021
4028015996219,7cyclictest4040924-21modprobe11:20:001
4028010996225,31cyclictest4037034-21cron10:05:010
4028010996222,35cyclictest363-21snmpd10:26:360
4028010996222,35cyclictest363-21snmpd10:26:360
402801599613,20cyclictest306-21in:imuxsock12:20:001
402801599613,20cyclictest1-21systemd08:15:001
4028015996123,4cyclictest4041642-21latency_hist11:30:021
4028015996122,9cyclictest235-21systemd-journal07:15:001
4028024996018,9cyclictest37-21ksoftirqd/311:40:003
402801599603,12cyclictest4034180-21modprobe09:10:011
4028015995922,4cyclictest4036261-21latency_hist09:50:021
4028024995816,10cyclictest37-21ksoftirqd/311:35:013
402801599583,17cyclictest4040416-21modprobe11:10:001
402801599583,17cyclictest4040416-21modprobe11:10:001
4028015995823,4cyclictest4029282-21latency_hist07:35:021
4028015995823,4cyclictest4029282-21latency_hist07:35:021
4028015995822,8cyclictest306-21in:imuxsock10:20:001
4028015995811,6cyclictest131rcu_preempt08:05:011
4028010995832,4cyclictest4037822-21munin-run10:19:590
4028010995815,10cyclictest12-21ksoftirqd/008:10:020
402802499575,17cyclictest4042826-21latency_hist11:55:013
4028024995715,8cyclictest37-21ksoftirqd/311:20:003
402801599575,11cyclictest4038837-21modprobe10:40:001
4028015995723,5cyclictest4043663-21latency_hist12:10:021
4028015995718,8cyclictest23-21ksoftirqd/110:25:011
4028010995618,9cyclictest4043262-21cron12:05:000
4028024995547,5cyclictest0-21swapper/307:10:013
402801599554,16cyclictest4035727-21modprobe09:40:001
4028015995521,5cyclictest4042103-21latency_hist11:40:011
4028010995546,6cyclictest16950irq/224-800000009:20:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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