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https://github.com/DarkflameUniverse/DarkflameServer.git
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The third ray backend, so every machine has a library for it: Embree on x86 CPUs (embree), HIPRT on AMD and NVIDIA GPUs (hiprt), Embree through SYCL on Intel Arc and Xe GPUs (embree-gpu). - CMake option DLU_EMBREE_SYCL (off). dUgcServer/EmbreeSycl is a project of its own built by a SYCL compiler (DLU_SYCL_CXX; icpx through ONEAPI_ROOT or the path, or the open source DPC++'s clang++ through DPCPP_ROOT) as an external project: Embree 4.4 with EMBREE_SYCL_SUPPORT, linked statically and bound inside (-Bsymbolic, only its C functions exported, so it never meets the servers' own Embree), and the GPU kernels (nearest hit skipping a ray's triangle, any hit), into libdlu_embree_sycl next to the servers - UgcRaysEmbreeGpu loads it the first time embree-gpu is asked for; one GPU for the process (embree_gpu_device picks it), the workers take turns, the occlusion rays in batches as for hiprt - without the build, the library or a supported Intel GPU it falls back to embree and says why (the UGC server's log at start, --make-model on stderr) - the option names, the settings page, the dashboard's picker, /reprocessproperty Verified here: the default build and ctest; the SYCL build with the open source DPC++ 7.1.0 (compiles, links against oneAPI's libsycl.so.9, exports only its C functions); on this machine (no Intel GPU) it loads, finds no GPU and falls back to embree. Not verified: tracing on an Intel GPU (none here). Check: on a machine with an Intel Arc or Xe GPU and oneAPI, configure with -DDLU_EMBREE_SYCL=ON and run UgcServer --make-model x.lxfml out embree-gpu; the UGC tests then compare it with Embree. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
59 lines
2.4 KiB
CMake
59 lines
2.4 KiB
CMake
# libdlu_embree_sycl: Embree 4 with its SYCL (Intel GPU) support and the UGC server's GPU ray kernels, for
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# ray_backend=embree-gpu. A project of its own, built by a SYCL compiler (Intel oneAPI DPC++'s icpx, or the open source
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# DPC++'s clang++) as an external project of the servers' build (DLU_EMBREE_SYCL), so the rest never needs one. Embree
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# is linked into it statically and bound inside it (-Bsymbolic, none of its symbols exported), so it never meets the
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# servers' own Embree (CPU), whose symbols have the same names.
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cmake_minimum_required(VERSION 3.25)
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project(dlu_embree_sycl CXX)
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include(FetchContent)
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set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
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set(CMAKE_POLICY_DEFAULT_CMP0126 NEW)
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set(CMAKE_CXX_STANDARD 17)
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set(CMAKE_POSITION_INDEPENDENT_CODE ON)
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set(BUILD_TESTING OFF)
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set(EMBREE_SYCL_SUPPORT ON)
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set(EMBREE_SYCL_AOT_DEVICES "none") # the kernels are compiled for the GPU found when first used
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set(EMBREE_STATIC_LIB ON)
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set(EMBREE_TASKING_SYSTEM "INTERNAL")
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set(EMBREE_ISPC_SUPPORT OFF)
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set(EMBREE_TUTORIALS OFF)
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set(EMBREE_ZIP_MODE OFF)
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set(EMBREE_INSTALL_DEPENDENCIES OFF)
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set(EMBREE_FILTER_FUNCTION OFF)
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set(EMBREE_RAY_MASK OFF)
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set(EMBREE_RAY_PACKETS OFF)
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set(EMBREE_BACKFACE_CULLING OFF)
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set(EMBREE_GEOMETRY_TRIANGLE ON)
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foreach(geometry QUAD CURVE SUBDIVISION USER INSTANCE INSTANCE_ARRAY GRID POINT)
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set(EMBREE_GEOMETRY_${geometry} OFF)
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endforeach()
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set(EMBREE_MAX_ISA "NONE")
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set(EMBREE_ISA_SSE2 ON)
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set(EMBREE_ISA_SSE42 OFF)
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set(EMBREE_ISA_AVX OFF)
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set(EMBREE_ISA_AVX2 OFF)
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set(EMBREE_ISA_AVX512 OFF)
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if(NOT CMAKE_BUILD_TYPE)
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set(CMAKE_BUILD_TYPE Release)
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endif()
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FetchContent_Declare(
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embree
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GIT_REPOSITORY https://github.com/RenderKit/embree.git
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GIT_TAG ff9381774dc99fea81a932ad276677aad6a3d4dd #refs/tags/v4.4.0
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GIT_PROGRESS TRUE
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GIT_SHALLOW 1
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)
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FetchContent_MakeAvailable(embree)
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add_library(dlu_embree_sycl SHARED UgcEmbreeSycl.cpp)
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target_compile_options(dlu_embree_sycl PRIVATE -fsycl -Xclang -fsycl-allow-func-ptr -fsycl-targets=spir64)
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target_link_options(dlu_embree_sycl PRIVATE -fsycl -fsycl-targets=spir64 -Wl,-Bsymbolic -Wl,--exclude-libs,ALL)
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target_link_libraries(dlu_embree_sycl PRIVATE embree ze_wrapper ${CMAKE_DL_LIBS})
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# Only the C interface is seen from outside
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set_target_properties(dlu_embree_sycl PROPERTIES CXX_VISIBILITY_PRESET hidden BUILD_RPATH "$ORIGIN" INSTALL_RPATH "$ORIGIN")
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install(TARGETS dlu_embree_sycl LIBRARY DESTINATION . RUNTIME DESTINATION .)
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