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Prior to Skylake the Gen HW timestamps were driven by a 12.5MHz clock with the convenient property of being able to scale by an integer (80) to nanosecond units. For Skylake the frequency is 12MHz or a scale factor of 83.333333 This updates gen_device_info to track a floating point timebase_scale factor and makes corresponding _queryobj.c changes to no longer assume a scale factor of 80 works across all gens. Although the gen6_ code could have been been left alone, the changes keep the code more comparable, and it now shares a few utility functions for scaling raw timestamps and calculating deltas. The utility for calculating deltas takes into account 32 or 36bit overflow depending on the current kernel version. Note: this leaves the timestamp handling of ARB_query_buffer_object untouched, which continues to use an incorrect scale of 80 on Skylake for now. This is more awkward to solve since the scaling is currently done using a very limited uint64 ALU available to the command parser that doesn't support multiply or divide where it's already taking a large number of instructions just to effectively multiple by 80. This fixes piglit arb_timer_query-timestamp-get on Skylake v2: (Ken) Update timebase_scale for platforms past Skylake/Broxton too. Signed-off-by: Robert Bragg <robert@sixbynine.org> Reviewed-by: Matt Turner <mattst88@gmail.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> |
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| common.py | ||
| configure.ac | ||
| install-gallium-links.mk | ||
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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 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.