DBus and epoll

anttu.t.koski at nokia.com anttu.t.koski at nokia.com
Mon Oct 25 05:46:55 PDT 2010

> -----Original Message-----
> From: dbus-bounces+anttu.t.koski=nokia.com at lists.freedesktop.org
> [mailto:dbus-bounces+anttu.t.koski=nokia.com at lists.freedesktop.org] On
> Behalf Of ext Thiago Macieira
> Sent: 25. lokakuuta 2010 14:40
> To: dbus at lists.freedesktop.org
> Subject: Re: DBus and epoll
> On Monday, 25 de October de 2010 07:29:35 anttu.t.koski at nokia.com
> wrote:
> > Yes, I meant the dbus-daemon. When it is serving the session or the
> > system bus it can have quite a lot of file descriptors to poll.
> As a session daemon too.
> Note that there's still a problem that it cannot handle more than 512
> simultaneous clients. So maybe switching the daemon's own loop to epoll
> would be beneficial.
> Anttu, do you have any numbers to show to us?

Well, not really. I just checked my traces and they show that generally dbus-daemon seems to spend most of its time in _dbus_poll() and the time increases with the number of file descriptors.

I can of course try to measure different things if needed for something.

And I haven't tried changing to epoll(). The code looks a bit too complex for a quick hack.


More information about the dbus mailing list