Низкое FPS

eix -I mesa
eix -I drm

$ eix -I mesa
[I] app-admin/eselect-mesa
     Available versions:  0.0.9 0.0.10
     Installed versions:  0.0.10(11:53:05 18.11.12)
     Homepage:            http://www.gentoo.org/
     Description:         Utility to change the Mesa OpenGL driver being used

[I] media-libs/mesa
     Available versions:  7.10.3 7.11 7.11.2 8.0.3 8.0.4-r1 9.0 ~9.0.1 {{bindist +classic debug +egl g3dvl +gallium gbm gles gles1 gles2 hardened kernel_FreeBSD (+)llvm motif +nptl openvg osmesa pax_kernel pic r600-llvm-compiler selinux shared-dricore +shared-glapi vdpau video_cards_i915 video_cards_i965 video_cards_intel video_cards_mach64 video_cards_mga video_cards_nouveau video_cards_r100 video_cards_r128 video_cards_r200 video_cards_r300 video_cards_r600 video_cards_radeon video_cards_radeonsi video_cards_savage video_cards_sis video_cards_tdfx video_cards_via video_cards_vmware wayland xa xorg xvmc}}
     Installed versions:  9.0(12:54:44 18.11.12)(classic egl gallium llvm nptl shared-glapi -bindist -debug -g3dvl -gbm -gles1 -gles2 -kernel_FreeBSD -openvg -osmesa -pax_kernel -pic -r600-llvm-compiler -selinux -vdpau -video_cards_i915 -video_cards_i965 -video_cards_intel -video_cards_nouveau -video_cards_r100 -video_cards_r200 -video_cards_r300 -video_cards_r600 -video_cards_radeon -video_cards_radeonsi -video_cards_vmware -wayland -xa -xorg -xvmc)
     Homepage:            http://mesa3d.sourceforge.net/
     Description:         OpenGL-like graphic library for Linux

[I] x11-apps/mesa-progs
     Available versions:  8.0.1
     Installed versions:  8.0.1(11:00:35 05.01.13)
     Homepage:            http://mesa3d.sourceforge.net/
     Description:         Mesa's OpenGL utility and demo programs (glxgears and glxinfo)

Found 3 matches.
------------------------------------------------------------
$ eix -I drm
[I] x11-libs/libdrm
     Available versions:  ~*2.4.20-r1^t 2.4.25^t 2.4.26^t 2.4.27^t ~2.4.29^t ~2.4.30^t ~2.4.31^t ~2.4.32^t 2.4.33^t ~2.4.34^t ~2.4.35^t ~2.4.37^t ~2.4.38^t ~2.4.39^t 2.4.40^t {{kernel_linux libkms static-libs video_cards_exynos video_cards_intel video_cards_nouveau video_cards_omap video_cards_radeon video_cards_vmware}}
     Installed versions:  2.4.40^t(22:05:37 08.12.12)(video_cards_radeon -libkms -static-libs -video_cards_exynos -video_cards_intel -video_cards_nouveau -video_cards_omap -video_cards_vmware)
     Homepage:            http://dri.freedesktop.org/
     Description:         X.Org libdrm library

export vblank_mode=0

-video_cards_r600

video_cards_r600

VIDEO_CARDS="r600"

eselect opengl list
eselect mesa list

$ eselect opengl list
Available OpenGL implementations:
  [1]   xorg-x11 *

$ eselect mesa list
64bit i915 (Intel 915, 945)
64bit i965 (Intel 965, G/Q3x, G/Q4x)
64bit r300 (Radeon R300-R500)
64bit r600 (Radeon R600-R700, Evergreen, Northern Islands)
64bit sw (Software renderer)
  [1]   classic
  [2]   gallium *
32bit i915 (Intel 915, 945)
  [1]   classic
  [2]   gallium *
32bit i965 (Intel 965, G/Q3x, G/Q4x)
  [1]   classic *
32bit r300 (Radeon R300-R500)
  [1]   gallium *
32bit r600 (Radeon R600-R700, Evergreen, Northern Islands)
  [1]   gallium *
32bit sw (Software renderer)
  [1]   classic
  [2]   gallium *

grep -i video /etc/make.conf
VIDEO_CARDS="r600"

vblank_mode=0 glxgears

$ vblank_mode=0 glxgears                                        
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: option value of option vblank_mode ignored.
5002 frames in 5.0 seconds = 999.201 FPS
5526 frames in 5.0 seconds = 1105.158 FPS
5481 frames in 5.0 seconds = 1095.694 FPS
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0"
      after 18762 requests (18762 known processed) with 0 events remaining.