Date: Wed, 15 Feb 2012 22:27:38 +0800 From: Meowthink <meowthink@gmail.com> To: virtualgl-devel@lists.sourceforge.net Cc: freebsd-x11@freebsd.org Subject: Test drive VirtualGL on FreeBSD/Intel HD Graphics Message-ID: <CABnABoYbUuX-t-4xPasM=H_%2BBjbVEEP6gFd8SD3WPsY1RJ_4kg@mail.gmail.com>
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[-- Attachment #1 --] Hello all, Thanks to kib's work, FreeBSD can use Intel's modern GPUs/drivers to accelerate recently. It's worth to test such configuration(FreeBSD on Intel GPU) can serve VirtualGL well or not. Environment: Intel i3-2100T (2nd Generation Core Processor Family Integrated Graphics Controller) FreeBSD 9.0-STABLE #50 r231739M: Wed Feb 15 15:11:05 CST 2012 root@test.example.org:/usr/obj/usr/src/sys/GENERIC amd64 Compile/Install: All prerequirements in BUILDING.txt seems available through port collection. Works followed instructions, since svn rev 4811 (I used to patch CMakeFiles.txt before but it's been fixed:-)) Configure: The script vglserver_config didn't provide FreeBSD branches. But it seems like users in wheel group get proper permission (/dev/dri, /opt/VirtualGL etc.) without running it. sshd must be enabled. Running: Functional with following problems until svn rev 4812 (rev 4813 seems break) Poblems: 1. Broken with V-Sync. I used to think this is a problem lies in GEM or DRI, describing it at http://lists.freebsd.org/pipermail/freebsd-x11/2011-December/011337.html Then I narrowed it down to V-Sync (it maybe lies in vgl, or maybe in mesa, or in intel's driver). To solve this problem, one can adding following section into driconf: <device screen="0" driver="dri2"> <application name="Default"> <option name="vblank_mode" value="1" /> </application> </device> (value="0" is either OK) Or running vglrun by some prefix vblank_mode=0 vglrun ... Yes, this setvar can be add into vglrun script, but I don't know if this will affect others, and it also results some annoying warnings in console. 2. Readback performance bottleneck. Without dedicated faster memories, it's reasonably that Intel GPUs won't provide very well performance, especially on pixel operations. When using mesa-7.11.2 and other stuffs from the concurrent xorg-dev branch xorg_7_5_2 (http://lists.freebsd.org/pipermail/freebsd-ports/2012-February/072859.html), the glxspheres demo reports Polygons in scene: 62464 Visual ID of window: 0x24 Context is Direct OpenGL Renderer: Mesa DRI Intel(R) Sandybridge Desktop Readback - 9.39 Mpixels/sec- 10.01 fps 9.439577 frames/sec - 8.849037 Mpixels/sec Compress 0 - 33.74 Mpixels/sec- 35.99 fps Total - 8.96 Mpixels/sec- 9.55 fps- 13.66 Mbits/sec (15.7:1) Readback - 9.41 Mpixels/sec- 10.03 fps 9.431724 frames/sec - 8.841675 Mpixels/sec Compress 0 - 32.93 Mpixels/sec- 35.13 fps Total - 8.83 Mpixels/sec- 9.42 fps- 14.04 Mbits/sec (15.1:1) Readback - 9.41 Mpixels/sec- 10.04 fps 9.439071 frames/sec - 8.848563 Mpixels/sec ...and glreadtest measures glReadPixels(): 9.320 Mpixels/sec (min = 9.312, max = 9.332, sdev = 0.003429) glReadPixels() accounted for 100.00% of total readback time (An interesting thing is that, though glDrawPixels differs a lot among pixel formats, glReadPixels always performs around 9.3Mpixels/sec. So a complete typescript is attached.) The bottleneck is at readback, and the poor performance ~9.3Mpixels/sec is only capable of running apps at 640x480x30fps! When doing readpixels benchmark from mesa-demo (also in attached typescript), I found that there maybe have room of VirtualGL to optimize, as vgl's readback speed seems stuck to the 10x10 in mesa-demo's readpixels benchmark, which give better results on larger reads. Some recent developments on mesa claim to improve performance (http://lists.freedesktop.org/archives/mesa-dev/2011-November/014015.html). So I also give a try. I got mesa compiled from git branch master, snb-magic-8850-g78734e3, nearly same as release 8.0. Yes it really improves readback performance to simple apps such as glxgears (with exception such as glxspheres, will be described later) Readback - 20.67 Mpixels/sec- 229.68 fps Compress 0 - 24.28 Mpixels/sec- 269.77 fps Total - 9.68 Mpixels/sec- 107.53 fps- 23.00 Mbits/sec (10.1:1) but this version of mesa on FreeBSD w/Intel GPU patch has BIG problem on Z-buffer. I can't figure out which part the problem lies in yet, but the result is obversely, as glxspheres gets Polygons in scene: 62464 Visual ID of window: 0x24 Context is Direct OpenGL Renderer: Mesa DRI Intel(R) Sandybridge Desktop Readback - 25.01 Mpixels/sec- 26.68 fps 0.585122 frames/sec - 0.548516 Mpixels/sec Compress 0 - 34.08 Mpixels/sec- 36.35 fps Total - 0.55 Mpixels/sec- 0.59 fps- 0.73 Mbits/sec (18.1:1) Readback - 25.63 Mpixels/sec- 27.34 fps 0.361668 frames/sec - 0.339042 Mpixels/sec Compress 0 - 35.74 Mpixels/sec- 38.12 fps Total - 0.34 Mpixels/sec- 0.36 fps- 0.49 Mbits/sec (16.5:1) What a terrible result! hmmm... definitely this is not VirtualGL's problem, but excuse me for a little off-topic here. I can trace down the problem to Z-buffer, because by commenting out the line 311 in glxspheres.c, //glEnable(GL_DEPTH_TEST); , the program draws as fast as others, through the drawing looks corrupt. Running glxspheres locally results nearly same, and the result of readpixels seems reflecting bad Z performance too. May anyone here give a help on how to narrow down the problem? Anyway, the ~20Mpixels/sec performance is capable of running apps at 640x480x60fps flawlessly or even 1024x768x25fps, far more better now. 3. App-specific: VirtualBox + VirtualGL didn't work VirtualBox 4.1.8_OSE r75467 from redports. Command line vglrun VirtualBox -startvm ... didn't work, switch +v +tr shows that fake libs are not loaded. I doubt this is due to VirtualBox binary is just a wrapper, not linked to libGL.so.1 /usr/local/bin/VirtualBox: libthr.so.3 => /lib/libthr.so.3 (0x800850000) libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x800a73000) libm.so.5 => /lib/libm.so.5 (0x800d83000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x800fa4000) libc.so.7 => /lib/libc.so.7 (0x8011b1000) Using the chromium way by doing $ export CR_SYSTEM_GL_PATH=/opt/VirtualGL/fakelib/64/ $ vglrun -nodl +v +tr VirtualBox -startvm windows ... [VGL] Shared memory segment ID for vglconfig: 65541 [VGL] VirtualGL v2.3.1 64-bit (Build 20120209) [VGL] Undefined symbol "glXChooseVisual" [VGL] WARNING: Could not load GLX/OpenGL symbols using RTLD_NEXT. Attempting [VGL] to load GLX/OpenGL symbols directly from libGL.so.1. [VGL] Undefined symbol "XCheckMaskEvent" [VGL] WARNING: Could not load X11 symbols using RTLD_NEXT. Attempting [VGL] to load X11 symbols directly from libX11. [VGL] Opening local display :0 Segmentation fault I tried +de and use gdb to trace. It seems that VirtualBox confused with which display is for X11(VirtualGL server) and which is remote(VirtualGL client). Details available at: http://pastebin.com/FaNAAwbK Conclusion: It works! Although the performance is not as good as professional level cards. It's still fun to play with. With the enhancement of hw/driver, this must be more and more useful. Thanks for your time. Regards, Meowthink [-- Attachment #2 --] $ glxinfo name of display: localhost:0.0 display: localhost:0 screen: 0 direct rendering: Yes server glx vendor string: SGI 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_MESA_copy_sub_buffer, 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, GLX_INTEL_swap_event client glx vendor string: Mesa Project and SGI client glx version string: 1.4 client glx extensions: GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_framebuffer_sRGB, GLX_MESA_copy_sub_buffer, GLX_MESA_multithread_makecurrent, GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap, GLX_INTEL_swap_event GLX version: 1.4 GLX extensions: GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, GLX_MESA_multithread_makecurrent, GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap OpenGL vendor string: Tungsten Graphics, Inc OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Desktop OpenGL version string: 2.1 Mesa 7.11.2 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_logic_op, 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_framebuffer_sRGB, GL_ARB_multitexture, GL_EXT_framebuffer_sRGB, 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_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_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_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_EXT_stencil_two_side, GL_EXT_texture_cube_map, GL_NV_depth_clamp, GL_NV_vertex_program1_1, GL_APPLE_client_storage, 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_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_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_color_buffer_float, GL_ARB_pixel_buffer_object, GL_ARB_texture_compression_rgtc, GL_ARB_texture_rectangle, GL_EXT_pixel_buffer_object, GL_EXT_texture_compression_rgtc, GL_EXT_texture_rectangle, GL_EXT_texture_sRGB, GL_ARB_framebuffer_object, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, GL_EXT_packed_depth_stencil, GL_APPLE_object_purgeable, GL_ARB_vertex_array_object, GL_ATI_separate_stencil, GL_EXT_draw_buffers2, GL_EXT_gpu_program_parameters, GL_EXT_texture_env_combine, GL_EXT_texture_sRGB_decode, GL_EXT_timer_query, GL_OES_EGL_image, GL_ARB_copy_buffer, 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_ES2_compatibility, GL_ARB_draw_elements_base_vertex, GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions, GL_ARB_provoking_vertex, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map, GL_ARB_shader_texture_lod, GL_EXT_provoking_vertex, GL_EXT_texture_snorm, GL_MESA_texture_signed_rgba, GL_ARB_robustness 32 GLX Visuals visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat ---------------------------------------------------------------------- 0x21 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x22 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x9d 24 tc 0 24 0 r . . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0x9e 24 tc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0x9f 24 tc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0xa0 24 tc 0 24 0 r . . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xa1 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xa2 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xa3 24 tc 0 32 0 r . . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xa4 24 tc 0 32 0 r y . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xa5 24 tc 0 32 0 r y . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xa6 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xa7 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xa8 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 16 16 16 0 0 0 Slow 0xa9 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xaa 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0xab 24 dc 0 24 0 r . . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0xac 24 dc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0xad 24 dc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0xae 24 dc 0 24 0 r . . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xaf 24 dc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xb0 24 dc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xb1 24 dc 0 32 0 r . . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xb2 24 dc 0 32 0 r y . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xb3 24 dc 0 32 0 r y . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xb4 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xb5 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xb6 24 dc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xb7 24 dc 0 24 0 r y . 8 8 8 0 0 24 8 16 16 16 0 0 0 Slow 0xb8 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xb9 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x6c 32 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None $ ./glreadtest GLreadtest v2.3.1 (Build 20120209) ./glreadtest -h for advanced usage. Rendering to Pbuffer using GLX on display localhost:0.0 FB Config = 0x73 Drawable size = 701 x 701 pixels Using 1-byte row alignment >>>>>>>>>> PIXEL FORMAT: LUM <<<<<<<<<< glDrawPixels(): 3.707 Mpixels/sec glReadPixels(): 558: ERROR: Bogus data read back. >>>>>>>>>> PIXEL FORMAT: RED <<<<<<<<<< glDrawPixels(): 3.772 Mpixels/sec glReadPixels(): 9.577 Mpixels/sec (min = 9.574, max = 9.603, sdev = 0.006106) glReadPixels() accounted for 100.00% of total readback time >>>>>>>>>> PIXEL FORMAT: BGRA <<<<<<<<<< glDrawPixels(): 28.46 Mpixels/sec glReadPixels(): 9.325 Mpixels/sec (min = 9.322, max = 9.333, sdev = 0.002067) glReadPixels() accounted for 100.00% of total readback time >>>>>>>>>> PIXEL FORMAT: ABGR <<<<<<<<<< glDrawPixels(): 3.740 Mpixels/sec glReadPixels(): 9.343 Mpixels/sec (min = 9.332, max = 9.348, sdev = 0.005665) glReadPixels() accounted for 100.00% of total readback time >>>>>>>>>> PIXEL FORMAT: BGR <<<<<<<<<< glDrawPixels(): 3.765 Mpixels/sec glReadPixels(): 9.428 Mpixels/sec (min = 9.426, max = 9.447, sdev = 0.004328) glReadPixels() accounted for 100.00% of total readback time >>>>>>>>>> PIXEL FORMAT: RGBA <<<<<<<<<< glDrawPixels(): 14.80 Mpixels/sec glReadPixels(): 9.376 Mpixels/sec (min = 9.368, max = 9.385, sdev = 0.003214) glReadPixels() accounted for 100.00% of total readback time >>>>>>>>>> PIXEL FORMAT: RGB <<<<<<<<<< glDrawPixels(): 14.81 Mpixels/sec glReadPixels(): 9.443 Mpixels/sec (min = 9.441, max = 9.457, sdev = 0.003304) glReadPixels() accounted for 100.00% of total readback time $ ./readpixels glReadPixels(10 x 10, RGBA/ubyte): 27306.7 images/sec, 10.4 Mpixels/sec glReadPixels(100 x 100, RGBA/ubyte): 907.8 images/sec, 34.6 Mpixels/sec glReadPixels(500 x 500, RGBA/ubyte): 37.4 images/sec, 35.7 Mpixels/sec glReadPixels(1000 x 1000, RGBA/ubyte): 9.4 images/sec, 35.7 Mpixels/sec glReadPixels(10 x 10, BGRA/ubyte): 27306.7 images/sec, 10.4 Mpixels/sec glReadPixels(100 x 100, BGRA/ubyte): 905.4 images/sec, 34.5 Mpixels/sec glReadPixels(500 x 500, BGRA/ubyte): 37.3 images/sec, 35.5 Mpixels/sec glReadPixels(1000 x 1000, BGRA/ubyte): 9.3 images/sec, 35.6 Mpixels/sec glReadPixels(10 x 10, RGB/565): 27283.9 images/sec, 5.2 Mpixels/sec glReadPixels(100 x 100, RGB/565): 897.5 images/sec, 17.1 Mpixels/sec glReadPixels(500 x 500, RGB/565): 36.9 images/sec, 17.6 Mpixels/sec glReadPixels(1000 x 1000, RGB/565): 9.2 images/sec, 17.6 Mpixels/sec glReadPixels(10 x 10, L/ubyte): 27058.6 images/sec, 2.6 Mpixels/sec glReadPixels(100 x 100, L/ubyte): 906.2 images/sec, 8.6 Mpixels/sec glReadPixels(500 x 500, L/ubyte): 37.4 images/sec, 8.9 Mpixels/sec glReadPixels(1000 x 1000, L/ubyte): 9.4 images/sec, 8.9 Mpixels/sec glReadPixels(10 x 10, Z/uint): 26969.5 images/sec, 10.3 Mpixels/sec glReadPixels(100 x 100, Z/uint): 844.2 images/sec, 32.2 Mpixels/sec glReadPixels(500 x 500, Z/uint): 34.7 images/sec, 33.1 Mpixels/sec glReadPixels(1000 x 1000, Z/uint): 8.6 images/sec, 32.9 Mpixels/sec glReadPixels(10 x 10, Z+S/uint): 31782.7 images/sec, 12.1 Mpixels/sec glReadPixels(100 x 100, Z+S/uint): 1583.9 images/sec, 60.4 Mpixels/sec glReadPixels(500 x 500, Z+S/uint): 66.3 images/sec, 63.2 Mpixels/sec glReadPixels(1000 x 1000, Z+S/uint): 17.4 images/sec, 66.3 Mpixels/sec $ [-- Attachment #3 --] $ export LD_LIBRARY_PATH=/opt/mesa/lib $ glxinfo name of display: localhost:0.0 display: localhost:0 screen: 0 direct rendering: Yes server glx vendor string: SGI 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_MESA_copy_sub_buffer, 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, GLX_INTEL_swap_event client glx vendor string: Mesa Project and SGI 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_visual_info, GLX_EXT_visual_rating, GLX_EXT_framebuffer_sRGB, GLX_EXT_create_context_es2_profile, GLX_MESA_copy_sub_buffer, GLX_MESA_multithread_makecurrent, GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap, GLX_INTEL_swap_event GLX version: 1.4 GLX extensions: GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, GLX_MESA_multithread_makecurrent, GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap OpenGL vendor string: Tungsten Graphics, Inc OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Desktop OpenGL version string: 2.1 Mesa 8.0-devel (git-78734e3) OpenGL shading language version string: 1.30 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_framebuffer_sRGB, GL_ARB_multitexture, GL_EXT_framebuffer_sRGB, 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_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_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_EXT_stencil_two_side, GL_EXT_texture_cube_map, GL_NV_depth_clamp, 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_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_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_color_buffer_float, GL_ARB_pixel_buffer_object, GL_ARB_texture_compression_rgtc, GL_ARB_texture_rectangle, GL_EXT_pixel_buffer_object, GL_EXT_texture_compression_rgtc, GL_EXT_texture_rectangle, GL_EXT_texture_sRGB, GL_ARB_framebuffer_object, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, GL_EXT_packed_depth_stencil, GL_APPLE_object_purgeable, GL_ARB_vertex_array_object, GL_ATI_separate_stencil, GL_EXT_draw_buffers2, GL_EXT_gpu_program_parameters, GL_EXT_texture_array, GL_EXT_texture_integer, GL_EXT_texture_sRGB_decode, GL_EXT_timer_query, GL_OES_EGL_image, GL_MESA_texture_array, GL_ARB_copy_buffer, GL_ARB_depth_buffer_float, 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_ES2_compatibility, GL_ARB_draw_elements_base_vertex, GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions, GL_ARB_provoking_vertex, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map, GL_ARB_shader_texture_lod, GL_EXT_provoking_vertex, GL_EXT_texture_snorm, GL_MESA_texture_signed_rgba, GL_ARB_robustness, GL_EXT_transform_feedback 32 GLX Visuals visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat ---------------------------------------------------------------------- 0x21 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x22 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x9d 24 tc 0 24 0 r . . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0x9e 24 tc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0x9f 24 tc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0xa0 24 tc 0 24 0 r . . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xa1 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xa2 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xa3 24 tc 0 32 0 r . . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xa4 24 tc 0 32 0 r y . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xa5 24 tc 0 32 0 r y . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xa6 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xa7 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xa8 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 16 16 16 0 0 0 Slow 0xa9 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xaa 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0xab 24 dc 0 24 0 r . . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0xac 24 dc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0xad 24 dc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None 0xae 24 dc 0 24 0 r . . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xaf 24 dc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xb0 24 dc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xb1 24 dc 0 32 0 r . . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xb2 24 dc 0 32 0 r y . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xb3 24 dc 0 32 0 r y . 8 8 8 8 0 0 0 0 0 0 0 0 0 None 0xb4 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xb5 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xb6 24 dc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None 0xb7 24 dc 0 24 0 r y . 8 8 8 0 0 24 8 16 16 16 0 0 0 Slow 0xb8 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0xb9 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x6c 32 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None $ ./glreadtest GLreadtest v2.3.1 (Build 20120209) ./glreadtest -h for advanced usage. Rendering to Pbuffer using GLX on display localhost:0.0 FB Config = 0x73 Drawable size = 701 x 701 pixels Using 1-byte row alignment >>>>>>>>>> PIXEL FORMAT: LUM <<<<<<<<<< glDrawPixels(): 3.706 Mpixels/sec glReadPixels(): 558: ERROR: Bogus data read back. >>>>>>>>>> PIXEL FORMAT: RED <<<<<<<<<< glDrawPixels(): 3.722 Mpixels/sec glReadPixels(): 29.50 Mpixels/sec (min = 29.16, max = 29.52, sdev = 0.04575) glReadPixels() accounted for 99.99% of total readback time >>>>>>>>>> PIXEL FORMAT: BGRA <<<<<<<<<< glDrawPixels(): 28.57 Mpixels/sec glReadPixels(): 24.69 Mpixels/sec (min = 24.58, max = 24.73, sdev = 0.02024) glReadPixels() accounted for 99.99% of total readback time >>>>>>>>>> PIXEL FORMAT: ABGR <<<<<<<<<< glDrawPixels(): 3.716 Mpixels/sec glReadPixels(): 24.67 Mpixels/sec (min = 24.63, max = 24.70, sdev = 0.01189) glReadPixels() accounted for 99.99% of total readback time >>>>>>>>>> PIXEL FORMAT: BGR <<<<<<<<<< glDrawPixels(): 3.696 Mpixels/sec glReadPixels(): 25.37 Mpixels/sec (min = 25.23, max = 25.43, sdev = 0.02423) glReadPixels() accounted for 99.99% of total readback time >>>>>>>>>> PIXEL FORMAT: RGBA <<<<<<<<<< glDrawPixels(): 14.72 Mpixels/sec glReadPixels(): 24.58 Mpixels/sec (min = 24.54, max = 24.59, sdev = 0.01085) glReadPixels() accounted for 99.99% of total readback time >>>>>>>>>> PIXEL FORMAT: RGB <<<<<<<<<< glDrawPixels(): 14.73 Mpixels/sec glReadPixels(): 25.37 Mpixels/sec (min = 25.29, max = 25.40, sdev = 0.01655) glReadPixels() accounted for 99.99% of total readback time $ ./readpixels glReadPixels(10 x 10, RGBA/ubyte): 18133.9 images/sec, 6.9 Mpixels/sec glReadPixels(100 x 100, RGBA/ubyte): 2082.4 images/sec, 79.4 Mpixels/sec glReadPixels(500 x 500, RGBA/ubyte): 99.0 images/sec, 94.4 Mpixels/sec glReadPixels(1000 x 1000, RGBA/ubyte): 24.8 images/sec, 94.8 Mpixels/sec glReadPixels(10 x 10, BGRA/ubyte): 18113.9 images/sec, 6.9 Mpixels/sec glReadPixels(100 x 100, BGRA/ubyte): 2114.6 images/sec, 80.7 Mpixels/sec glReadPixels(500 x 500, BGRA/ubyte): 99.4 images/sec, 94.8 Mpixels/sec glReadPixels(1000 x 1000, BGRA/ubyte): 24.9 images/sec, 95.1 Mpixels/sec glReadPixels(10 x 10, RGB/565): 18044.1 images/sec, 3.4 Mpixels/sec glReadPixels(100 x 100, RGB/565): 1976.8 images/sec, 37.7 Mpixels/sec glReadPixels(500 x 500, RGB/565): 91.9 images/sec, 43.8 Mpixels/sec glReadPixels(1000 x 1000, RGB/565): 22.9 images/sec, 43.8 Mpixels/sec glReadPixels(10 x 10, L/ubyte): 17828.1 images/sec, 1.7 Mpixels/sec glReadPixels(100 x 100, L/ubyte): 2048.0 images/sec, 19.5 Mpixels/sec glReadPixels(500 x 500, L/ubyte): 95.7 images/sec, 22.8 Mpixels/sec glReadPixels(1000 x 1000, L/ubyte): 24.1 images/sec, 23.0 Mpixels/sec glReadPixels(10 x 10, Z/uint): 2539.4 images/sec, 1.0 Mpixels/sec glReadPixels(100 x 100, Z/uint): 372.9 images/sec, 14.2 Mpixels/sec glReadPixels(500 x 500, Z/uint): 17.5 images/sec, 16.7 Mpixels/sec glReadPixels(1000 x 1000, Z/uint): 4.4 images/sec, 16.8 Mpixels/sec glReadPixels(10 x 10, Z+S/uint): 2491.5 images/sec, 1.0 Mpixels/sec glReadPixels(100 x 100, Z+S/uint): 320.4 images/sec, 12.2 Mpixels/sec glReadPixels(500 x 500, Z+S/uint): 14.7 images/sec, 14.0 Mpixels/sec glReadPixels(1000 x 1000, Z+S/uint): 3.7 images/sec, 14.1 Mpixels/sec $
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