<div dir="ltr">I don't think glxgears is the best benchmark for what is a "typical" OpenGL load (if there is a "typical"). The 60 FPS with your hardware driver sounds suspiciously like the refresh rate of your screen; perhaps it is synchronized with the vertical retrace? Since I'm assuming you want to find the fastest driver, why not try a free and open source game like openarena to give you a better idea of how they actually perform.<div> </div><div> </div><div style>Patrick</div></div><div class="gmail_extra"> <div class="gmail_quote">On Mon, May 6, 2013 at 9:33 AM, Divick Kishore <<a href="mailto:divick.kishore@gmail.com" target="_blank">divick.kishore@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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 When compiled with configure options --build=x86_64-linux-gnu --disable-egl --with-gallium-drivers= --with-driver=xlib --disable-egl CFLAGS="-Wall -g -O2" CXXFLAGS="-Wall -g -O2" glxgears reports: GL_RENDERER = Mesa X11 GL_VERSION = 2.1 Mesa 8.0.5 GL_VENDOR = Brian Paul fps: ~1600 With drivers installed on system and with LIBGL_ALWAYS_SOFTWARE=1: GL_RENDERER = Gallium 0.4 on llvmpipe (LLVM 0x209) GL_VERSION = 2.1 Mesa 8.0.5 GL_VENDOR = VMware, Inc. fps: ~ 1130 Thanks & Regards, Divick _______________________________________________ mesa-dev mailing list <a href="mailto:mesa-dev@lists.freedesktop.org">mesa-dev@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/mesa-dev" target="_blank">http://lists.freedesktop.org/mailman/listinfo/mesa-dev</a> </blockquote></div> </div>