With dri3 and certain levels of dri2, the glx-dri layer automatically turn on some GLX extensions whose functionality is mostly emulated on virtual drivers. This causes a performance loss and increased latency. Two such examples are GLX_EXT_buffer_age and GLX_OML_sync_control. We'd like the ability to turn those off on a per-application and per-driver basis to avoid the performance loss.
Now, dri-glx only looks for options in the "dri2" driver which firstly plays badly with driconf, and secondly doesn't allow us to turn the extensions off on a per-driver basis. So have dri-glx also check the driver options on gallium drivers, preferring the driver options if there is a clash. We implement the new options for all gallium drivers with a default not to disable those GLX extensions. Finally for the default drirc, turn those extensions off for the gnome-shell on vmwgfx combination. That might be modified in the future to also cover other compositors. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
