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Refactor limit_jobs.cmake

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Robert Schulze 2023-07-17 10:33:09 +00:00
parent 381ab07e1b
commit 10c15a6548
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1 changed files with 25 additions and 28 deletions
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53
cmake/limit_jobs.cmake
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@ -1,16 +1,14 @@
# Usage:
# set (MAX_COMPILER_MEMORY 2000 CACHE INTERNAL "") # In megabytes
# set (MAX_LINKER_MEMORY 3500 CACHE INTERNAL "")
# Usage from CMake:
# set (MAX_COMPILER_MEMORY 2000 CACHE INTERNAL "") # megabyte
# set (MAX_LINKER_MEMORY 3500 CACHE INTERNAL "") # megabyte
# include (cmake/limit_jobs.cmake)
cmake_host_system_information(RESULT TOTAL_PHYSICAL_MEMORY QUERY TOTAL_PHYSICAL_MEMORY) # Not available under freebsd
cmake_host_system_information(RESULT NUMBER_OF_LOGICAL_CORES QUERY NUMBER_OF_LOGICAL_CORES)
# 1 if not set
option(PARALLEL_COMPILE_JOBS "Maximum number of concurrent compilation jobs" "")
# 1 if not set
option(PARALLEL_LINK_JOBS "Maximum number of concurrent link jobs" "")
# Set to disable the automatic job-limiting
option(PARALLEL_COMPILE_JOBS "Maximum number of concurrent compilation jobs" OFF)
option(PARALLEL_LINK_JOBS "Maximum number of concurrent link jobs" OFF)
if (NOT PARALLEL_COMPILE_JOBS AND TOTAL_PHYSICAL_MEMORY AND MAX_COMPILER_MEMORY)
math(EXPR PARALLEL_COMPILE_JOBS ${TOTAL_PHYSICAL_MEMORY}/${MAX_COMPILER_MEMORY})
@ -19,17 +17,10 @@ if (NOT PARALLEL_COMPILE_JOBS AND TOTAL_PHYSICAL_MEMORY AND MAX_COMPILER_MEMORY)
set (PARALLEL_COMPILE_JOBS 1)
endif ()
if (NOT NUMBER_OF_LOGICAL_CORES OR PARALLEL_COMPILE_JOBS LESS NUMBER_OF_LOGICAL_CORES)
set (PARALLEL_COMPILE_JOBS_LESS TRUE)
set (PARALLEL_COMPILE_JOBS_UNDERUTILIZING TRUE)
endif()
endif ()
if (PARALLEL_COMPILE_JOBS AND (NOT NUMBER_OF_LOGICAL_CORES OR PARALLEL_COMPILE_JOBS LESS NUMBER_OF_LOGICAL_CORES))
set(CMAKE_JOB_POOL_COMPILE compile_job_pool${CMAKE_CURRENT_SOURCE_DIR})
string (REGEX REPLACE "[^a-zA-Z0-9]+" "_" CMAKE_JOB_POOL_COMPILE ${CMAKE_JOB_POOL_COMPILE})
set_property(GLOBAL APPEND PROPERTY JOB_POOLS ${CMAKE_JOB_POOL_COMPILE}=${PARALLEL_COMPILE_JOBS})
endif ()
if (NOT PARALLEL_LINK_JOBS AND TOTAL_PHYSICAL_MEMORY AND MAX_LINKER_MEMORY)
math(EXPR PARALLEL_LINK_JOBS ${TOTAL_PHYSICAL_MEMORY}/${MAX_LINKER_MEMORY})
@ -37,7 +28,7 @@ if (NOT PARALLEL_LINK_JOBS AND TOTAL_PHYSICAL_MEMORY AND MAX_LINKER_MEMORY)
set (PARALLEL_LINK_JOBS 1)
endif ()
if (NOT NUMBER_OF_LOGICAL_CORES OR PARALLEL_LINK_JOBS LESS NUMBER_OF_LOGICAL_CORES)
set (PARALLEL_LINK_JOBS_LESS TRUE)
set (PARALLEL_LINK_JOBS_UNDERUTILIZING TRUE)
endif()
endif ()
@ -52,20 +43,26 @@ if (CMAKE_BUILD_TYPE_UC STREQUAL "RELWITHDEBINFO" AND ENABLE_THINLTO AND PARALLE
set (PARALLEL_LINK_JOBS 2)
endif()
message(STATUS "System has ${NUMBER_OF_LOGICAL_CORES} logical cores and ${TOTAL_PHYSICAL_MEMORY} megabytes of memory. Building with ${PARALLEL_COMPILE_JOBS} compile jobs and ${PARALLEL_COMPILE_JOBS} linker jobs.")
if (PARALLEL_COMPILE_JOBS OR PARALLEL_LINK_JOBS)
if (PARALLEL_COMPILE_JOBS_UNDERUTILIZING)
message(WARNING "The autocalculated compile jobs limit (${PARALLEL_COMPILE_JOBS}) underutilizes CPU cores (${NUMBER_OF_LOGICAL_CORES}). Set PARALLEL_COMPILE_JOBS to override.")
endif()
if (PARALLEL_LINK_JOBS_UNDERUTILIZING)
message(WARNING "The autocalculated link jobs limit (${PARALLEL_LINK_JOBS}) underutilizes CPU cores (${NUMBER_OF_LOGICAL_CORES}). Set PARALLEL_LINK_JOBS to override.")
endif()
endif ()
if (PARALLEL_COMPILE_JOBS AND (NOT NUMBER_OF_LOGICAL_CORES OR PARALLEL_COMPILE_JOBS LESS NUMBER_OF_LOGICAL_CORES))
set(CMAKE_JOB_POOL_COMPILE compile_job_pool${CMAKE_CURRENT_SOURCE_DIR})
string (REGEX REPLACE "[^a-zA-Z0-9]+" "_" CMAKE_JOB_POOL_COMPILE ${CMAKE_JOB_POOL_COMPILE})
set_property(GLOBAL APPEND PROPERTY JOB_POOLS ${CMAKE_JOB_POOL_COMPILE}=${PARALLEL_COMPILE_JOBS})
endif ()
if (PARALLEL_LINK_JOBS AND (NOT NUMBER_OF_LOGICAL_CORES OR PARALLEL_LINK_JOBS LESS NUMBER_OF_LOGICAL_CORES))
set(CMAKE_JOB_POOL_LINK link_job_pool${CMAKE_CURRENT_SOURCE_DIR})
string (REGEX REPLACE "[^a-zA-Z0-9]+" "_" CMAKE_JOB_POOL_LINK ${CMAKE_JOB_POOL_LINK})
set_property(GLOBAL APPEND PROPERTY JOB_POOLS ${CMAKE_JOB_POOL_LINK}=${PARALLEL_LINK_JOBS})
endif ()
if (PARALLEL_COMPILE_JOBS OR PARALLEL_LINK_JOBS)
message(STATUS
"${CMAKE_CURRENT_SOURCE_DIR}: Have ${TOTAL_PHYSICAL_MEMORY} megabytes of memory.
Limiting concurrent linkers jobs to ${PARALLEL_LINK_JOBS} and compiler jobs to ${PARALLEL_COMPILE_JOBS} (system has ${NUMBER_OF_LOGICAL_CORES} logical cores)")
if (PARALLEL_COMPILE_JOBS_LESS)
message(WARNING "The autocalculated compile jobs limit (${PARALLEL_COMPILE_JOBS}) underutilizes CPU cores (${NUMBER_OF_LOGICAL_CORES}). Set PARALLEL_COMPILE_JOBS to override.")
endif()
if (PARALLEL_LINK_JOBS_LESS)
message(WARNING "The autocalculated link jobs limit (${PARALLEL_LINK_JOBS}) underutilizes CPU cores (${NUMBER_OF_LOGICAL_CORES}). Set PARALLEL_LINK_JOBS to override.")
endif()
endif ()