On Don, 2011-11-10 at 18:01 +0100, Michal Suchanek wrote: > On 10 November 2011 17:46, Alex Deucher <alexdeuc...@gmail.com> wrote: > > On Wed, Nov 9, 2011 at 12:36 PM, Iustin Pop <ius...@debian.org> wrote: > >> > >> The recent upgrade of xserver-xorg-video-radeon from 1:6.14.2-2 to > >> 1:6.14.3-1 enabled ColorTiling for my card, which in turn caused a > >> significant performance degradation in 2D (yes, I understand it should > >> make 3D faster, but I didn't know it should slow down 2D applications). > >> > >> I'm using plain 2D environment (openbox, no compositing, anything) and > >> plain xterm (bitmap fonts, no AA, etc.). The speed of display text has > >> changed significantly enough that I can "see" my mutt refreshing the > >> inbox and drawing the lines. > > > > Tiling will speed up all rendering (2D and 3D). However, it sounds > > like you are using an environment that is mostly software rendering. > > As such in order for the CPU to access tiled buffers, the GPU has to > > copy them to a linear buffer before CPU can access it properly. > > FWIW I have color tiling enabled and have no speed issues in urxvt - > TrueType fonts, AA enabled, etc. > > Unlike xterm urxvt (rxvt-unicode) uses some special font-rendering > libraries, however. > > If I understand it correctly xterm would use the in-server bitmap font > rendering which the X server can accelerate as much as it wants.
Core bitmap fonts are completely unaccelerated so far with EXA. xterm can also use Xft for font rendering via the -fa option though, which is well accelerated. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Debian, X and DRI developer -- To UNSUBSCRIBE, email to debian-x-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/1320945343.28639.15.camel@thor.local