CPU usage 100% for OGL apps

[Gilboa Davara]

It's a problem with glxgears itself. Think nothing of it.
Try a nice OpenGL screen saver and you'll see the CPU usage drop.
I use the GLMatrix screen-saver and the CPU load on my dual Opteron /
GF6800GT machine never passes the 10% line.

Gilboa

On Wed, 2005-10-12 at 12:36 +0200, Mostafa Z. Afgani wrote:

> Dear all,
> 
> I've noticed that the CPU usage on my AMD64 3500+ shoots up to 100% 
> whenever I run any OpenGL apps; including glxgears. I have a Nvidia 6800 
> Ultra using the binary driver from Livna.org. As far as I can tell, the 
> nvidia OGL libraries are being used and Direct Rendering is on:
> 
> 
> [darkknight at darkworld ~]$ glxinfo
> name of display: :0.0
> display: :0  screen: 0
> direct rendering: Yes
> server glx vendor string: NVIDIA Corporation
> server glx version string: 1.3
> server glx extensions:
>      GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig,
>      GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control,
>      GLX_ARB_multisample, GLX_NV_float_buffer, GLX_ARB_fbconfig_float
> client glx vendor string: NVIDIA Corporation
> client glx version string: 1.3
> client glx extensions:
>      GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info,
>      GLX_EXT_visual_rating, GLX_EXT_import_context, GLX_SGI_video_sync,
>      GLX_NV_swap_group, GLX_NV_video_out, GLX_SGIX_fbconfig, 
> GLX_SGIX_pbuffer,
>      GLX_SGI_swap_control, GLX_NV_float_buffer, GLX_ARB_fbconfig_float
> GLX extensions:
>      GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig,
>      GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control,
>      GLX_ARB_multisample, GLX_NV_float_buffer, GLX_ARB_fbconfig_float,
>      GLX_ARB_get_proc_address
> OpenGL vendor string: NVIDIA Corporation
> OpenGL renderer string: GeForce 6800 Ultra/AGP/SSE2
> OpenGL version string: 2.0.0 NVIDIA 76.76
> OpenGL extensions:
>      GL_ARB_color_buffer_float, GL_ARB_depth_texture, GL_ARB_draw_buffers,
>      GL_ARB_fragment_program, GL_ARB_fragment_program_shadow,
>      GL_ARB_fragment_shader, GL_ARB_half_float_pixel, GL_ARB_imaging,
>      GL_ARB_multisample, GL_ARB_multitexture, GL_ARB_occlusion_query,
>      GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_shadow,
>      GL_ARB_shader_objects, GL_ARB_shading_language_100,
>      GL_ARB_texture_border_clamp, GL_ARB_texture_compression,
>      GL_ARB_texture_cube_map, GL_ARB_texture_env_add,
>      GL_ARB_texture_env_combine, GL_ARB_texture_env_dot3, 
> GL_ARB_texture_float,
>      GL_ARB_texture_mirrored_repeat, GL_ARB_texture_non_power_of_two,
>      GL_ARB_texture_rectangle, GL_ARB_transpose_matrix,
>      GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, 
> GL_ARB_vertex_shader,
>      GL_ARB_window_pos, GL_ATI_draw_buffers, GL_ATI_texture_float,
>      GL_ATI_texture_mirror_once, GL_S3_s3tc, GL_EXT_texture_env_add,
>      GL_EXT_abgr, GL_EXT_bgra, 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,
>      GL_EXT_Cg_shader, GL_EXT_depth_bounds_test, GL_EXT_draw_range_elements,
>      GL_EXT_fog_coord, GL_EXT_framebuffer_object, GL_EXT_multi_draw_arrays,
>      GL_EXT_packed_pixels, GL_EXT_pixel_buffer_object, 
> GL_EXT_point_parameters,
>      GL_EXT_rescale_normal, GL_EXT_secondary_color,
>      GL_EXT_separate_specular_color, GL_EXT_shadow_funcs,
>      GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, GL_EXT_texture3D,
>      GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map,
>      GL_EXT_texture_edge_clamp, GL_EXT_texture_env_combine,
>      GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic,
>      GL_EXT_texture_lod, GL_EXT_texture_lod_bias, 
> GL_EXT_texture_mirror_clamp,
>      GL_EXT_texture_object, GL_EXT_vertex_array, GL_HP_occlusion_test,
>      GL_IBM_rasterpos_clip, GL_IBM_texture_mirrored_repeat,
>      GL_KTX_buffer_region, GL_NV_blend_square, GL_NV_copy_depth_to_color,
>      GL_NV_depth_clamp, GL_NV_fence, GL_NV_float_buffer, GL_NV_fog_distance,
>      GL_NV_fragment_program, GL_NV_fragment_program_option,
>      GL_NV_fragment_program2, GL_NV_half_float, GL_NV_light_max_exponent,
>      GL_NV_multisample_filter_hint, GL_NV_occlusion_query,
>      GL_NV_packed_depth_stencil, GL_NV_pixel_data_range, GL_NV_point_sprite,
>      GL_NV_primitive_restart, GL_NV_register_combiners,
>      GL_NV_register_combiners2, GL_NV_texgen_reflection,
>      GL_NV_texture_compression_vtc, GL_NV_texture_env_combine4,
>      GL_NV_texture_expand_normal, GL_NV_texture_rectangle,
>      GL_NV_texture_shader, GL_NV_texture_shader2, GL_NV_texture_shader3,
>      GL_NV_vertex_array_range, GL_NV_vertex_array_range2, 
> GL_NV_vertex_program,
>      GL_NV_vertex_program1_1, GL_NV_vertex_program2,
>      GL_NV_vertex_program2_option, GL_NV_vertex_program3,
>      GL_NVX_conditional_render, GL_SGIS_generate_mipmap, 
> GL_SGIS_texture_lod,
>      GL_SGIX_depth_texture, GL_SGIX_shadow, GL_SUN_slice_accum
> glu version: 1.3
> glu extensions:
>      GLU_EXT_nurbs_tessellator, GLU_EXT_object_space_tess
> 
> [...]
> 
> 
> glxgears gives me a frame rate of 13708.400 FPS so there doesn't appear 
> to be anything wrong.... So, why the 100% CPU usage for any OGL apps??
> 
> TIA
> -M
> 
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