[konsole] [Bug 470563] konsole bell sound blows up memory usage of pipewire-pulse

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=470563

--- Comment #1 from tcanabrava at kde.org ---
This is a helpful bug report, thanks. I'll try to simulate here and talk
with the pipewire folks.

On Fri, Jun 2, 2023 at 9:11 PM <bugzilla_noreply at kde.org> wrote:

> https://bugs.kde.org/show_bug.cgi?id=470563
>
>             Bug ID: 470563
>            Summary: konsole bell sound blows up memory usage of
>                     pipewire-pulse
>     Classification: Applications
>            Product: konsole
>            Version: 22.12.3
>           Platform: Kubuntu
>                 OS: Linux
>             Status: REPORTED
>           Severity: normal
>           Priority: NOR
>          Component: general
>           Assignee: konsole-devel at kde.org
>           Reporter: dmattes at gmx.de
>   Target Milestone: ---
>
> SUMMARY
>
> If konsole plays bell sounds in quick succession, the memory usage of the
> pipewire-pulse background process grows without limits. The memory usage
> does
> not go down over time. The pipewire-pulse process has to be restarted to
> reclaim the memory.
>
> STEPS TO REPRODUCE
>
> 1. Open konsole.
> 2. Open the Settings -> Configure Notifications ... dialog. Select "Bell in
> focused session" from the list of events. Check "Play a sound" and select
> an
> existing sound file. Apply.
> 3. Press Ctrl+Esc to open the "System Activity" monitor - or any other too
> that
> is able to show the memory consumption of background processes.
> 4. In the console window, press and hold backspace key for a few seconds to
> generate a quick succession of bell sounds.
> 5. Watch how the memory consumption of pipewire-pulse behaves.
>
> OBSERVED RESULT
>
> The memory consumption grows to several hundred megabytes and stays high
> afterwards. When releasing the key, the memory consumption goes down a
> little
> bit but stays high. This behavior may also be caused by other applications
> that
> play sound. When I play audio using audacious or watching a video in
> firefox,
> the memory consumption of pipewire-pulse stays very low (a few megabytes).
> When
> I discovered the problem, pipewire-pulse permanently occupied over 600 MiB.
> After a reboot, the memory consumption was on the normal level of a few
> megabytes.
>
> EXPECTED RESULT
>
> I would expect that the memory consumption grows a bit while playing the
> possibly overlapping bell sounds and then
> goes down to a few megabytes after the internal buffers have been freed.
>
> SOFTWARE/OS VERSIONS
> Linux kernel: 6.2.0-20-generic (64-bit)
> KDE Plasma Version: 5.27.5 (backports on Kubuntu 23.04)
> KDE Frameworks Version: 5.106.0
> Qt Version: 5.15.8
> pipewire/pipewire-pulse Version: 0.3.65-3
> libpulse0 Version: 1:16.1+dfsg1-2ubuntu3
>
> ADDITIONAL INFORMATION
>
> The bug may be anywhere between konsole and pipewire-pulse. I filed this
> bug
> under konsole because it can be reproduced in the konsole window and I
> couldn't
> identify other applications that let the memory consumption grow that much.
>
> --
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