[libc-commits] [libc] [libc] NVPTX Profiling Draft (PR #92009)

[Joseph Huber via libc-commits]

================
@@ -1,205 +1,211 @@
-find_package(Threads)
-
-set(LLVM_LINK_COMPONENTS
-  Support
-  TargetParser
-  )
-
-#==============================================================================
-# Add Unit Testing Support
-#==============================================================================
-
-function(add_libc_benchmark_unittest target_name)
-  if(NOT LLVM_INCLUDE_TESTS)
-    return()
-  endif()
-
-  cmake_parse_arguments(
-    "LIBC_BENCHMARKS_UNITTEST"
-    "" # No optional arguments
-    "SUITE" # Single value arguments
-    "SRCS;DEPENDS" # Multi-value arguments
-    ${ARGN}
-  )
-
-  add_executable(${target_name}
-    EXCLUDE_FROM_ALL
-    ${LIBC_BENCHMARKS_UNITTEST_SRCS}
-  )
-  target_link_libraries(${target_name}
-    PRIVATE
-    llvm_gtest_main
-    llvm_gtest
-    ${LIBC_BENCHMARKS_UNITTEST_DEPENDS}
-  )
-  llvm_update_compile_flags(${target_name})
-
-  add_custom_command(
-    TARGET ${target_name}
-    POST_BUILD
-    COMMAND $<TARGET_FILE:${target_name}>
-  )
-  add_dependencies(libc-benchmark-util-tests ${target_name})
-endfunction()
-
-#==============================================================================
-# Build Google Benchmark for libc
-#==============================================================================
-
-include(ExternalProject)
-ExternalProject_Add(google-benchmark-libc
-        EXCLUDE_FROM_ALL ON
-        PREFIX google-benchmark-libc
-        SOURCE_DIR ${LLVM_THIRD_PARTY_DIR}/benchmark
-        INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/google-benchmark-libc
-        CMAKE_CACHE_ARGS
-          -DBENCHMARK_ENABLE_EXCEPTIONS:BOOL=OFF
-          -DBENCHMARK_ENABLE_LTO:BOOL=OFF
-          -DBENCHMARK_ENABLE_TESTING:BOOL=OFF
-          -DBENCHMARK_ENABLE_WERROR:BOOL=${LLVM_ENABLE_WERROR}
-          -DBENCHMARK_FORCE_WERROR:BOOL=OFF
-          -DBENCHMARK_USE_LIBCXX:BOOL=OFF
-          -DCMAKE_BUILD_TYPE:STRING=Release
-
-          -DCMAKE_SYSTEM_NAME:STRING=${CMAKE_SYSTEM_NAME}
-          -DCMAKE_SYSTEM_PROCESSOR:STRING=${CMAKE_SYSTEM_PROCESSOR}
-          -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
-          -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
-          -DCMAKE_CXX_FLAGS:STRING=${CMAKE_CXX_FLAGS}
-          -DCMAKE_FIND_ROOT_PATH:STRING=${CMAKE_FIND_ROOT_PATH}
-
-          -DBUILD_SHARED_LIBS:BOOL=OFF
-          -DCMAKE_EXE_LINKER_FLAGS:STRING=-static
-
-          -DCMAKE_CXX_STANDARD:STRING=14
-          -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
-        )
-
-add_custom_target(libc-benchmark-util-tests)
-
-# libc-benchmark
-add_library(libc-benchmark
-    STATIC
-    EXCLUDE_FROM_ALL
-    LibcBenchmark.cpp
-    LibcBenchmark.h
-)
-
-target_include_directories(libc-benchmark
-    PUBLIC ${LLVM_INCLUDE_DIR} ${LLVM_MAIN_INCLUDE_DIR}
-)
-target_link_libraries(libc-benchmark
-    PUBLIC
-    benchmark::benchmark
-    LLVMSupport
-    LLVMTargetParser
-    Threads::Threads
-)
-add_dependencies(libc-benchmark google-benchmark-libc)
-llvm_update_compile_flags(libc-benchmark)
-
-add_libc_benchmark_unittest(libc-benchmark-test
-    SRCS LibcBenchmarkTest.cpp
-    DEPENDS libc-benchmark
-)
-
-# libc-memory-benchmark
-add_library(libc-memory-benchmark
-    STATIC
-    EXCLUDE_FROM_ALL
-    LibcMemoryBenchmark.cpp
-    LibcMemoryBenchmark.h
-    LibcFunctionPrototypes.h
-    MemorySizeDistributions.cpp
-    MemorySizeDistributions.h
-)
-target_include_directories(libc-memory-benchmark
-    PUBLIC
-    ${CMAKE_CURRENT_SOURCE_DIR}
-)
-target_link_libraries(libc-memory-benchmark
-    PUBLIC
-    libc-benchmark
-)
-llvm_update_compile_flags(libc-memory-benchmark)
-
-add_libc_benchmark_unittest(libc-memory-benchmark-test
-    SRCS LibcMemoryBenchmarkTest.cpp
-    DEPENDS libc-memory-benchmark
-)
-
-# json
-add_library(json
-    STATIC
-    EXCLUDE_FROM_ALL
-    JSON.cpp
-    JSON.h
-)
-target_link_libraries(json PUBLIC libc-memory-benchmark)
-llvm_update_compile_flags(json)
-
-add_libc_benchmark_unittest(json-test
-    SRCS JSONTest.cpp
-    DEPENDS json
-)
-
-#==============================================================================
-# Benchmarking tool
-#==============================================================================
-
-# Benchmark all implementations that can run on the target CPU.
-function(add_libc_multi_impl_benchmark name)
-  get_property(fq_implementations GLOBAL PROPERTY ${name}_implementations)
-  foreach(fq_config_name IN LISTS fq_implementations)
-    get_target_property(required_cpu_features ${fq_config_name} REQUIRE_CPU_FEATURES)
-    cpu_supports(can_run "${required_cpu_features}")
-    if(can_run)
-        set(benchmark_name ${fq_config_name}_benchmark)
-        add_executable(${benchmark_name}
-            EXCLUDE_FROM_ALL
-            LibcMemoryBenchmarkMain.cpp
-        )
-        get_target_property(entrypoint_object_file ${fq_config_name} "OBJECT_FILE_RAW")
-        target_link_libraries(${benchmark_name} PUBLIC json ${entrypoint_object_file})
-        string(TOUPPER ${name} name_upper)
-        target_compile_definitions(${benchmark_name} PRIVATE "-DLIBC_BENCHMARK_FUNCTION_${name_upper}=LIBC_NAMESPACE::${name}" "-DLIBC_BENCHMARK_FUNCTION_NAME=\"${fq_config_name}\"")
-        llvm_update_compile_flags(${benchmark_name})
-    else()
-      message(STATUS "Skipping benchmark for '${fq_config_name}' insufficient host cpu features '${required_cpu_features}'")
-    endif()
-  endforeach()
-endfunction()
-
-add_libc_multi_impl_benchmark(bcmp)
-add_libc_multi_impl_benchmark(bzero)
-add_libc_multi_impl_benchmark(memcmp)
-add_libc_multi_impl_benchmark(memcpy)
-add_libc_multi_impl_benchmark(memmove)
-add_libc_multi_impl_benchmark(memset)
-
-#==============================================================================
-# Google Benchmarking tool
-#==============================================================================
-
-# This target uses the Google Benchmark facility to report throughput for llvm
-# libc memory functions compiled for the host machine. This is useful to
-# continuously monitor the performance of the memory functions.
-add_executable(libc.benchmarks.memory_functions.opt_host
-  EXCLUDE_FROM_ALL
-  LibcMemoryGoogleBenchmarkMain.cpp
-  LibcDefaultImplementations.cpp
-)
-target_link_libraries(libc.benchmarks.memory_functions.opt_host
-  PRIVATE
-  libc-memory-benchmark
-  libc.src.string.memcmp_opt_host.__internal__
-  libc.src.string.bcmp_opt_host.__internal__
-  libc.src.string.memcpy_opt_host.__internal__
-  libc.src.string.memset_opt_host.__internal__
-  libc.src.string.bzero_opt_host.__internal__
-  libc.src.string.memmove_opt_host.__internal__
-  benchmark_main
-)
-llvm_update_compile_flags(libc.benchmarks.memory_functions.opt_host)
-
-add_subdirectory(automemcpy)
+if(NOT LIBC_TARGET_OS_IS_GPU)
----------------
jhuber6 wrote:

```suggestion
if(LIBC_TARGET_OS_IS_GPU)
  add_subdirectory(gpu)
  return()
endif()
```
No need to change the whole file.

https://github.com/llvm/llvm-project/pull/92009