glxgears
# vblank_mode=0 glxgears
root@slitaz:~# uname -a
Linux slitaz 4.9.30-slitaz #2 SMP Fri Jun 16 13:58:14 Europe 2017 i686 GNU/Linux
root@slitaz:~# glxinfo | egrep 'render|version'
direct rendering: Yes
server glx version string: 1.4
client glx version string: 1.4
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
GLX version: 1.4
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
OpenGL renderer string: Mesa DRI Intel(R) Haswell Desktop x86/MMX/SSE2
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.2.4
OpenGL core profile shading language version string: 4.50
GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
GL_MESA_texture_signed_rgba, GL_NV_conditional_render, GL_NV_depth_clamp,
OpenGL version string: 3.0 Mesa 17.2.4
OpenGL shading language version string: 1.30
GL_ARB_compute_shader, GL_ARB_conditional_render_inverted,
GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_light_max_exponent,
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.2.4
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
GL_OES_fbo_render_mipmap, GL_OES_geometry_point_size,
root@slitaz:~# vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
52035 frames in 5.0 seconds = 10406.958 FPS
51978 frames in 5.0 seconds = 10395.498 FPS
52428 frames in 5.0 seconds = 10485.462 FPS
52128 frames in 5.0 seconds = 10425.471 FPS
