<div class="gmail_quote">2013/2/22 Michel Dänzer <<a href="mailto:michel@daenzer.net" target="_blank">michel@daenzer.net</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div class="im">On Don, 2013-02-21 at 16:41 +0100, Yannick Meyer wrote: > Hi all, > > I am currently wondering why I have a big difference in performance > between 2 Mesa drivers: egl_glx and egl_gallium. > I have already posted a mesasge 2 weeks ago on the mesa user list, but > I did not receive any answer. Please find below my previous mail > > I am currently working on an ARM processor without graphical > acceleration (based on A5 without any GPU and neon instruction). > I used Open Embedded to build the distribution for my board, and > therefore Mesa was compiled with the whole system for the ARM board. > > I made some test performance using egl_gears to find the best > configuration of the EGL library. > I am surprised by the difference between egl_glx and egl_gallium > driver. > > I was expecting that the egl_gallium driver will be faster that the > egl_glx driver. The egl_glx driver is around 9-10 times faster than > egl_gallium. > > Can someone explain me what could be the difference? </div>egl_glx uses the underlying GLX implementation, so its performance depends on that. You'll need to provide more details, e.g. the output of glxinfo in the environment you're running the tests in. -- Earthling Michel Dänzer | <a href="http://www.amd.com" target="_blank">http://www.amd.com</a> Libre software enthusiast | Debian, X and DRI developer </blockquote><div> </div></div>Please find below the extract of glxinfo. But from what I know, glxinfo will give information about the GLX implementation, and no details about the gallium stuff. name of display: :0 Mesa warning: couldn't open libtxc_dxtn.so, software DXTn compression/decompression unavailable Mesa warning: XMesaCreateWindowBuffer: depth mismatch between visual (32) and window (0)! display: :0 screen: 0 direct rendering: Yes server glx vendor string: Brian Paul server glx version string: 1.4 Mesa 8.0.5 server glx extensions: GLX_MESA_copy_sub_buffer, GLX_MESA_pixmap_colormap, GLX_MESA_release_buffers, GLX_ARB_get_proc_address, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer client glx vendor string: Brian Paul client glx version string: 1.4 Mesa 8.0.5 client glx extensions: GLX_MESA_copy_sub_buffer, GLX_MESA_pixmap_colormap, GLX_MESA_release_buffers, GLX_ARB_get_proc_address, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer GLX version: 1.4 GLX extensions: GLX_MESA_copy_sub_buffer, GLX_MESA_pixmap_colormap, GLX_MESA_release_buffers, GLX_ARB_get_proc_address, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer OpenGL vendor string: Brian Paul OpenGL renderer string: Mesa X11 OpenGL version string: 2.1 Mesa 8.0.5 OpenGL shading language version string: 1.20 OpenGL extensions: GL_ARB_multisample, GL_EXT_abgr, GL_EXT_bgra, GL_EXT_blend_color, GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_copy_texture, GL_EXT_polygon_offset, GL_EXT_subtexture, GL_EXT_texture_object, GL_EXT_vertex_array, GL_EXT_compiled_vertex_array, GL_EXT_texture, GL_EXT_texture3D, GL_IBM_rasterpos_clip, GL_ARB_point_parameters, GL_EXT_draw_range_elements, GL_EXT_packed_pixels, GL_EXT_point_parameters, GL_EXT_rescale_normal, GL_EXT_separate_specular_color, GL_EXT_texture_edge_clamp, GL_SGIS_generate_mipmap, GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp, GL_SGIS_texture_lod, GL_ARB_multitexture, GL_IBM_multimode_draw_arrays, GL_IBM_texture_mirrored_repeat, GL_3DFX_texture_compression_FXT1, GL_ARB_texture_cube_map, GL_ARB_texture_env_add, GL_ARB_transpose_matrix, GL_EXT_blend_func_separate, GL_EXT_fog_coord, GL_EXT_multi_draw_arrays, GL_EXT_secondary_color, GL_EXT_texture_env_add, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_lod_bias, GL_INGR_blend_func_separate, GL_MESA_resize_buffers, GL_NV_blend_square, GL_NV_light_max_exponent, GL_NV_texgen_reflection, GL_NV_texture_env_combine4, GL_SUN_multi_draw_arrays, GL_ARB_texture_border_clamp, GL_ARB_texture_compression, GL_EXT_framebuffer_object, GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3, GL_MESA_window_pos, GL_NV_packed_depth_stencil, GL_NV_texture_rectangle, GL_NV_vertex_program, GL_ARB_depth_texture, GL_ARB_occlusion_query, GL_ARB_shadow, GL_ARB_shadow_ambient, GL_ARB_texture_env_combine, GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3, GL_ARB_texture_mirrored_repeat, GL_ARB_window_pos, GL_ATI_envmap_bumpmap, GL_ATI_fragment_shader, GL_EXT_stencil_two_side, GL_EXT_texture_cube_map, GL_NV_depth_clamp, GL_NV_fragment_program, GL_NV_point_sprite, GL_NV_vertex_program1_1, GL_APPLE_packed_pixels, GL_APPLE_vertex_array_object, GL_ARB_draw_buffers, GL_ARB_fragment_program, GL_ARB_fragment_shader, GL_ARB_shader_objects, GL_ARB_vertex_program, GL_ARB_vertex_shader, GL_ATI_draw_buffers, GL_ATI_texture_env_combine3, GL_EXT_depth_bounds_test, GL_EXT_shadow_funcs, GL_EXT_stencil_wrap, GL_MESA_pack_invert, GL_MESA_ycbcr_texture, GL_ARB_depth_clamp, GL_ARB_fragment_program_shadow, GL_ARB_half_float_pixel, GL_ARB_occlusion_query2, GL_ARB_point_sprite, GL_ARB_shading_language_100, GL_ARB_sync, GL_ARB_texture_non_power_of_two, GL_ARB_vertex_buffer_object, GL_ATI_blend_equation_separate, GL_EXT_blend_equation_separate, GL_OES_read_format, GL_ARB_pixel_buffer_object, GL_ARB_texture_compression_rgtc, GL_ARB_texture_rectangle, GL_ATI_texture_compression_3dc, GL_EXT_pixel_buffer_object, GL_EXT_texture_compression_rgtc, GL_EXT_texture_mirror_clamp, GL_EXT_texture_rectangle, GL_EXT_texture_sRGB, GL_EXT_texture_shared_exponent, GL_ARB_framebuffer_object, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, GL_EXT_packed_depth_stencil, GL_NV_fragment_program_option, GL_APPLE_object_purgeable, GL_ARB_vertex_array_object, GL_ATI_separate_stencil, GL_ATI_texture_mirror_once, GL_EXT_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_gpu_program_parameters, GL_EXT_texture_array, GL_EXT_texture_compression_latc, GL_EXT_texture_sRGB_decode, GL_EXT_timer_query, GL_MESA_texture_array, GL_ARB_copy_buffer, GL_ARB_draw_instanced, GL_ARB_half_float_vertex, GL_ARB_map_buffer_range, GL_ARB_texture_rg, GL_ARB_texture_swizzle, GL_ARB_vertex_array_bgra, GL_EXT_separate_shader_objects, GL_EXT_texture_swizzle, GL_EXT_vertex_array_bgra, GL_NV_conditional_render, GL_ARB_draw_elements_base_vertex, GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions, GL_ARB_provoking_vertex, GL_EXT_provoking_vertex, GL_ARB_robustness, GL_ARB_texture_storage 2 GLX Visuals visual x bf lv rg d st colorbuffer sr ax dp st accumbuffer ms cav id dep cl sp sz l ci b ro r g b a F gb bf th cl r g b a ns b eat ---------------------------------------------------------------------------- 0x021 16 tc 0 16 0 r y . 5 6 5 0 . . 0 16 8 16 16 16 16 0 0 None 0x041 32 tc 0 32 0 r y . 8 8 8 0 . . 0 16 8 16 16 16 0 0 0 None 2 GLXFBConfigs: visual x bf lv rg d st colorbuffer sr ax dp st accumbuffer ms cav id dep cl sp sz l ci b ro r g b a F gb bf th cl r g b a ns b eat ---------------------------------------------------------------------------- 0x021 16 tc 0 16 0 r y . 5 6 5 0 . . 0 16 8 16 16 16 16 0 0 None 0x041 32 tc 0 32 0 r y . 8 8 8 0 . . 0 16 8 16 16 16 16 0 0 None Regards, Yannick