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This hardware race condition has caused problems several times already (see "i965: Fix cache pollution race during L3 partitioning set-up.", "i965: Fix brw_render_cache_set_check_flush's PIPE_CONTROLs." and "i965: intel_texture_barrier reimplemented"). The problem is that whenever we attempt to both flush and invalidate multiple caches with a single pipe control command the flush and invalidation happen in reverse order, so the contents flushed from the R/W caches aren't guaranteed to become visible from the invalidated caches after the PIPE_CONTROL command completes execution if some concurrent rendering workload happened to pollute any of the invalidated R/O caches in the short window of time between the invalidation and flush. This makes sure that brw_emit_pipe_control_flush() has the effect expected by most callers of making the contents flushed from any R/W caches visible from the invalidated R/O caches. Cc: "12.0 11.1 11.2" <mesa-stable@lists.freedesktop.org> Reviewed-by: Jason Ekstrand <jason@jlekstrand.net> |
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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 http://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.