Matt Turner
f37ede40ba
Write-combine mappings give much better performance on writes than
uncached access through the GTT.
Improves performance of GFXBench 4's gl_driver2 benchmark at 1024x768
on Apollolake by 3.6086% +/- 0.674193% (n=15).
v2: (by Ken) Rebase on lockless mappings, map_count deletion, valgrind
updates, potential for CPU/WC maps failing, and other changes.
v3: (by Ken and Chris Wilson)
(Ken): Rebase on set_domain -> gem_wait
(Chris): Fix up a failed CPU/WC mmaping with a GTT mapping
Not all objects will be mappable for direct access by the CPU
(either using WC/CPU or WC paths), for example, a dmabuf wrapping an
object on a foreign device or an object wrapping access to stolen
memory. Since either the physical pages are not known or even do not
exist, we need to use the mediated, indirect access via the GTT. (If
one day, the kernel does suddenly start providing mediated access
via a regular WB/WC mmapping, we no longer need the fallback.)
v4: Avoid falling back for MAP_RAW (Chris).
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see https://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.