On Wed, May 4, 2016 at 7:43 PM, Marek Olšák <mar...@gmail.com> wrote: > Hi, > > This patch series completely rewrites texture copying with SDMA for CIK & VI. > It only uses the "partial" copy packets, which makes it a lot simpler (one > packet per layered/3D copy). Most of the complexity is in handling hw > limitations, but luckily the SDMA path can be used in the majority of cases. > > On top of that, the DMA IB support is improved thanks to extensive testing > and benchmarking. > > This is only enabled on VI for now. It can be enabled on CIK after enough > testing is done. > > There is one more hardware limitation that can cause VM faults with T2L > copies and needs a workaround. The exact workaround is still under > discussion, but I think this is good enough for review already. > > On Tonga, it beats the 3D engine in texture upload performance by 0-80%. On > APUs, the performance is mixed or slightly worse. The reason may be that the > 3D engine uses less bandwidth thanks to DCC. > > The fact that SDMA can't do DCC compression can be detrimental to texturing > performance on VI. The impact hasn't been measured yet. > > Texture uploads still use 2 copies (user memory -> linear, linear -> tiled). > Merging those 2 copies into 1 is not done in this series. > > Please review and opinions on the DCC issue are welcome,
Have you looked at using SDMA for buffer clears as well? Patches are: Reviewed-by: Alex Deucher <alexander.deuc...@amd.com> > > Marek > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/mesa-dev _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
