Bug#487635: The perfomance degrading since lenny also affects to ltsp clients
2009/5/11 Julien Cristau
<jcristau@debian.org>
On Mon, May 11, 2009 at 14:13:52 +0200, José L. Redrejo wrote:
> I've tested it using both lenny and squeeze versions of libx11-6. Only
> downgrading to libx11-6 from etch allows some applications (as java
> apps) run in an usable way.
>
> Maybe this info can help:
> https://bugs.launchpad.net/ubuntu/+source/libxcb/+bug/277069
> and
> http://bugs.freedesktop.org/show_bug.cgi?id=17868
> say that the problems appeared since libx11-6 was linked with xcb.
>
> This problem is very important for Debian Edu users. Up to now, the only
> workaround is downgrading to the etch library.
Does this get fixed by bumping libxcb's buffer size to 16k instead of 4?
Cheers,
Julien
I didn't know that was possible. After reading
http://lists.freedesktop.org/archives/xcb/2008-September/003906.html it seems that setting the env variable
LIBXCB_QUEUE_BUFFER_SIZE makes it possible, but according to http://lists.freedesktop.org/archives/xcb/2008-September/003905.html the default value is already xcb_queue_buffer_size=16384. So
- are these patches available in lenny or squeeze versions of libxcb1 in Debian?
- if they are, it seems that 16384 doesn't improve it, as I've already tested lenny and squeeze versions of libxcb1. Can you suggest any other value to test?
or maybe I'm wrong and there's another known way to do what you suggest. In that case, please, I need you to teach me how to do it to test this bug.
Cheers
José L.
Reply to: