[Development] Qt 5.0 Beta Performance

David Boosalis david.boosalis at gmail.com
Wed Sep 5 02:03:13 CEST 2012 

My vsync is enabled on my KDE control panel and here is my glxinfo output:

name of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: ATI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_import_context,
GLX_EXT_texture_from_pixmap,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_OML_swap_method,
    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGIS_multisample,
    GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group
client glx vendor string: ATI
client glx version string: 1.4
client glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
    GLX_EXT_swap_control, GLX_EXT_visual_info, GLX_EXT_visual_rating,
    GLX_MESA_allocate_memory, GLX_MESA_copy_sub_buffer,
GLX_MESA_swap_control,
    GLX_MESA_swap_frame_usage, GLX_NV_swap_group, GLX_OML_swap_method,
    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync,
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
    GLX_SGIX_swap_barrier, GLX_SGIX_swap_group,
GLX_SGIX_visual_select_group,
    GLX_EXT_texture_from_pixmap, GLX_EXT_framebuffer_sRGB,
    GLX_ARB_fbconfig_float, GLX_AMD_gpu_association
GLX version: 1.4
GLX extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
    GLX_EXT_swap_control, GLX_EXT_visual_info, GLX_EXT_visual_rating,
    GLX_MESA_swap_control, GLX_NV_swap_group, GLX_OML_swap_method,
    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync,
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
    GLX_SGIX_swap_barrier, GLX_SGIX_swap_group,
GLX_SGIX_visual_select_group,
GLX_EXT_texture_from_pixmap, GLX_EXT_framebuffer_sRGB,
    GLX_ARB_fbconfig_float, GLX_AMD_gpu_association
GLX version: 1.4
GLX extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
    GLX_EXT_swap_control, GLX_EXT_visual_info, GLX_EXT_visual_rating,
    GLX_MESA_swap_control, GLX_NV_swap_group, GLX_OML_swap_method,
    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync,
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
    GLX_SGIX_swap_barrier, GLX_SGIX_swap_group,
GLX_SGIX_visual_select_group,
GLX_EXT_texture_from_pixmap
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 6800 Series
OpenGL version string: 4.2.11631 Compatibility Profile Context
OpenGL shading language version string: 4.20
OpenGL extensions:
    GL_AMDX_debug_output, GL_AMDX_vertex_shader_tessellator,
    GL_AMD_conservative_depth, GL_AMD_debug_output,
    GL_AMD_depth_clamp_separate, GL_AMD_draw_buffers_blend,
    GL_AMD_multi_draw_indirect, GL_AMD_name_gen_delete,
    GL_AMD_performance_monitor, GL_AMD_pinned_memory,
GL_AMD_sample_positions,
    GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export,
    GL_AMD_shader_trace, GL_AMD_texture_cube_map_array,
    GL_AMD_texture_texture4, GL_AMD_transform_feedback3_lines_triangles,
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_tessellator,
    GL_AMD_vertex_shader_viewport_index, GL_ARB_ES2_compatibility,
    GL_ARB_base_instance, GL_ARB_blend_func_extended,
    GL_ARB_color_buffer_float, GL_ARB_compressed_texture_pixel_storage,
    GL_ARB_conservative_depth, GL_ARB_copy_buffer,
GL_ARB_depth_buffer_float,
    GL_ARB_depth_clamp, GL_ARB_depth_texture, GL_ARB_draw_buffers,
    GL_ARB_draw_buffers_blend, GL_ARB_draw_elements_base_vertex,
    GL_ARB_draw_indirect, GL_ARB_draw_instanced,
    GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions,
    GL_ARB_fragment_program, GL_ARB_fragment_program_shadow,
    GL_ARB_fragment_shader, GL_ARB_framebuffer_object,
    GL_ARB_framebuffer_sRGB, GL_ARB_geometry_shader4,
    GL_ARB_get_program_binary, GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64,
GL_ARB_provoking_vertex, GL_ARB_sample_shading, GL_ARB_sampler_objects,
    GL_ARB_seamless_cube_map, GL_ARB_separate_shader_objects,
    GL_ARB_shader_atomic_counters, GL_ARB_shader_bit_encoding,
    GL_ARB_shader_image_load_store, GL_ARB_shader_objects,
    GL_ARB_shader_precision, GL_ARB_shader_stencil_export,
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_lod,
    GL_ARB_shading_language_100, GL_ARB_shading_language_420pack,
    GL_ARB_shading_language_packing, GL_ARB_shadow, GL_ARB_shadow_ambient,
    GL_ARB_sync, GL_ARB_tessellation_shader, GL_ARB_texture_border_clamp,
    GL_ARB_texture_buffer_object, GL_ARB_texture_buffer_object_rgb32,
    GL_ARB_texture_compression, GL_ARB_texture_compression_bptc,
    GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map,
    GL_ARB_texture_cube_map_array, GL_ARB_texture_env_add,
    GL_ARB_texture_env_combine, GL_ARB_texture_env_crossbar,
    GL_ARB_texture_env_dot3, GL_ARB_texture_float, GL_ARB_texture_gather,
    GL_ARB_texture_mirrored_repeat, GL_ARB_texture_multisample,
    GL_ARB_texture_non_power_of_two, GL_ARB_texture_query_lod,
    GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui,
    GL_ARB_texture_snorm, GL_ARB_texture_storage, GL_ARB_timer_query,
    GL_ARB_transform_feedback2, GL_ARB_transform_feedback3,
    GL_ARB_transform_feedback_instanced, GL_ARB_transpose_matrix,
    GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra,
    GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_64bit,
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_program,
GL_ARB_vertex_shader,
    GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_viewport_array,
    GL_ARB_window_pos, GL_ATI_draw_buffers, GL_ATI_envmap_bumpmap,
    GL_ATI_fragment_shader, GL_ATI_meminfo, GL_ATI_separate_stencil,
    GL_ATI_texture_compression_3dc, GL_ATI_texture_env_combine3,
    GL_ATI_texture_float, GL_ATI_texture_mirror_once, GL_EXT_abgr,
    GL_EXT_bgra, GL_EXT_bindable_uniform, GL_EXT_blend_color,
    GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate,
    GL_EXT_blend_minmax, GL_EXT_blend_subtract,
GL_EXT_compiled_vertex_array,



On Mon, Sep 3, 2012 at 12:49 AM, Samuel Rødal <samuel.rodal at nokia.com>wrote:

> On 09/03/2012 09:42 AM, ext Samuel Rødal wrote:
> > On 08/31/2012 02:05 AM, ext David Boosalis wrote:
> >> I download the latest beta version of Qt 5.0 onto my Linux box (Kubuntu
> >> 12.04) . For  a beta it looks real good, but one thing I found
> >> concerning was the performance.  I mean even running the demo "samegame"
> >> take over 98% of my cpu. Being that it is only the first beta release I
> >> am sure there is plenty of room for optimization,   but 98% of my
> >> I5-2500 cpu seems  a little excessive. I did the default configure and
> >> build so maybe it was built without any optimization.  Any thoughts on
> >> this ?
> >
> > I only see it hovering at around 7 % CPU on Ubuntu 12.04 with Intel HD
> > Graphics 3000. It could as someone else mentioned be caused by a lack of
> > vsync enabled in the graphics driver control panel, or in the desktop
> > effects control panel on KDE. A lack of vsync might cause rendering to
> > happen at a rate of many hundred fps, way above what's necessary.
>
> Alternatively, your OpenGL driver ends up using a software fallback.
> Could you provide the output of running "glxinfo" on your machine?
>
> --
> Samuel
>
>
> _______________________________________________
> Development mailing list
> Development at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/development
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/development/attachments/20120904/b4ec5192/attachment.html>

More information about the Development mailing list