On Mon, May 6, 2013 at 10:33 AM, Divick Kishore <divick.kish...@gmail.com> wrote: > Hi, > I am trying to build s/w only mesa driver. It seems that the > performance of software only renderer (compiled with > --with-driver=xlib) is higher than that of h/w drivers. Could someone > please help me understand what is causing this or if it is expected? > > I see that dri based s/w renderer is also slower than xlib/swrast > driver. So how does dri based s/w rendering work and why is it slower > than xlib/swrast driver? > > I presume that --with-driver=xlib builds s/w only renderer. Please > correct me if I am wrong. > > ./configure -build=x86_64-linux-gnu --with-driver=dri > --with-dri-drivers="i915 swrast" > --with-dri-driverdir=/home/divick/work/mesa/mesa-8.0.5/build/dri/x86_64-linux-gnu/ > --with-dri-searchpath='/home/divick/work/mesa/mesa-8.0.5/build/dri/x86_64-linux-gnu/' > --enable-glx-tls --enable-shared-glapi --enable-texture-float > --enable-xa --enable-driglx-direct --with-egl-platforms="x11 drm" > --enable-gallium-llvm --with-gallium-drivers="swrast i915" > --enable-gles1 --enable-gles2 --enable-openvg --enable-gallium-egl > --disable-glu CFLAGS="-Wall -g -O2" CXXFLAGS="-Wall -g -O2" > > with LIBGL_ALWAYS_SOFTWARE=1 > glxgears reports: > > GL_RENDERER = Software Rasterizer > GL_VERSION = 2.1 Mesa 8.0.5 > GL_VENDOR = Mesa Project > > fps: ~ 490 fps > > Without LIBGL_ALWAYS_SOFTWARE set: > > GL_RENDERER = Mesa DRI Intel(R) Sandybridge Mobile > GL_VERSION = 3.0 Mesa 8.0.5 > GL_VENDOR = Tungsten Graphics, Inc > > fps: ~ 60
The default is to sync to the refresh rate. Try setting env var vblank_mode=0 to disable it. Alex _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
