Hi Nicolas, To answer your questions: - The applications are linked to libGL.so, but this library depends on the driver used by X. The DISPLAY environment variable affects the X server to be used by the application - The idea of such a wrapper is already used by Bumblebee, namely virtualgl (http://virtualgl.org/). - I don't think it would be useful to remap calls directly considering that the X server is responsible for rendering and displaying. Without using a solution like virtualgl, both actions cannot be separated. A solution dedicated to this design would certainly improve performance, but it'll likely requrie a lot work. https://github.com/Bumblebee-Project/Bumblebee/issues/37
Regards, Lekensteyn On Mon, Feb 6, 2012 at 9:57 AM, Nicolas Joyard <[email protected]>wrote: > Lekensteyn, > > Thanks for your answer. Some additional questions on this topic : > - Which binaries are linked with GL libraries from the graphics drivers ? > The X server binaries or user application binaries (or both) ? > - Would a GL wrapper library (linked with GL libs from two drivers, and > that redirects calls to one or the other based on a runtime-switchable > parameter) impact graphics performance a lot ? > - Is there any way to remap calls to a dynamically linked library to an > other one at runtime (I guess the answer to that one is no, but maybe the > kernel is able to do some form of address translation) > > Thanks for your answers, > > Nicolas JOYARD > > > > > On Mon, Jan 30, 2012 at 10:41, Lekensteyn <[email protected]> wrote: > >> Hi Hicolas, >> >> Considering that the Bumblebee X server and primary X server use >> different GL libraries (at >> least for the proprietary drivers), I don't think it's possible. >> >> Regards, >> Lekensteyn >> >> On Mon, Jan 30, 2012 at 8:20 AM, Nicolas Joyard <[email protected] >> > wrote: >> >>> Hello, >>> >>> Given that some applications don't need full-time GPU processing power >>> (eg. web browsers) I wonder whether it would be feasible to dynamically >>> switch already-running applications from or to an optirun-started X server. >>> >>> What do you think about it ? Could it be possible to start an empty >>> optirun and then use tools like xmove to switch servers ? >>> >>> Nicolas >>> >>> _______________________________________________ >>> Mailing list: https://launchpad.net/~hybrid-graphics-linux >>> Post to : [email protected] >>> Unsubscribe : https://launchpad.net/~hybrid-graphics-linux >>> More help : https://help.launchpad.net/ListHelp >>> >>> >> >
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