There was a leak in 0.3.40 that could explain this, see
https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/1840
Upcoming 0.3.41 will have this fixed. At least I can't reproduce this
anymore with the test you posted below.
Wim
On Sun, Dec 12, 2021 at 12:49 PM Dominique Martinet <asmad...@codewreck.org>
wrote:
> Fabio Valentini wrote on Sun, Dec 12, 2021 at 12:25:11PM +0100:
> > > on my laptop, /usr/bin/pipewire uses 56M RSS, 5M SHR,
> > > but /usr/bin/pipewire-pulse uses 347M RSS, 4M SHR.
> > > 56M is okeyish, but 347M seems a lot. I think firefox is going
> > > through pipewire-pulse, so that interface might be getting more use
> > > than native pipewire. But what are the expected values for this?
> >
> > That certainly seems high to me. On my system I see values like
> > - pipewire: resident memory ~18M, shared memory ~8M
> > - pipewire-pulse: redident memory ~19M, shared memory ~6M
> > even while playing audio from firefox, for example.
> >
> > Where did you get those RSS values?
> > I checked in gnome-system-monitor and with ps -aux, and both reported
> > the same values for resident memory (RSS).
>
> To add another datapoint I also have always seen pretty high RSS usage
> from pipewire-pulse:
>
> $ ps aux|grep pipewire
> myuser 14645 0.5 0.4 198772 79100 ? Ssl Dec07 38:08
> /usr/bin/pipewire
> myuser 14646 0.6 3.4 713516 555756 ? SLsl Dec07 45:29
> /usr/bin/pipewire-pulse
> myuser 14652 0.0 0.0 38112 12228 ? Sl Dec07 0:04
> /usr/bin/pipewire-media-session
>
> (so 555MB RSS)
>
>
> I've also noticed that the background cpu% usage seems to increase, so
> I'd say the memory is still reachable somewhere and there must be some
> list getting big and skimmed through from time to time; restarting the
> pipewire processes when I start seeing them climb too high in htop makes
> them behave again...
>
>
> ... Okay, so there's an obvious leak when pulse clients connect and
> leave on pipewire-0.3.40-1.fc34.x86_64, about 3MB per client (!).
>
>
> I've just pkill pipewire to restart it:
> asmadeus 293661 0.5 0.0 31612 7276 ? S<sl 20:40 0:00
> /usr/bin/pipewire-pulse
> asmadeus 293675 1.5 0.0 56092 11488 ? S<sl 20:40 0:00
> /usr/bin/pipewire
> asmadeus 293678 5.0 0.0 37528 12364 ? S<l 20:40 0:00
> /usr/bin/pipewire-media-session
>
> then ran mpv in a tight loop, 100 times:
> for i in {1..100}; do mpv somefile.opus -length 1 & done; wait
> (pulseaudio output)
>
> and rss climbed to 313MB:
> asmadeus 293661 2.6 1.9 689228 313832 ? S<sl 20:40 0:01
> /usr/bin/pipewire-pulse
> asmadeus 293675 1.8 0.4 188392 76844 ? S<sl 20:40 0:01
> /usr/bin/pipewire
> asmadeus 293678 0.5 0.0 38168 12672 ? S<l 20:40 0:00
> /usr/bin/pipewire-media-session
>
> another 100 times brings it up to 652'672.
>
> I had noticed that firefox likes to create new output streams and closes
> them everytime there's a video, even if sound is muted, so I'd think
> that on some sites it would behave quite similarly to that.
>
>
> I've uploaded pw-dump after this if that's any help:
> https://gaia.codewreck.org/local/tmp/pw-dump
>
> But it should be easy to reproduce, I don't think I have anything
> too specific sound-wise here...
>
>
> Happy to open an issue upstream if there isn't one yet, I haven't had a
> look. Trying to reproduce on master would likely be first.
> Please let me know if you take over or I'll look into it further over
> the next few days...
> --
> Dominique Martinet | Asmadeus
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