ICODE-ADC/lammps
4
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

set host specific optimizations in CMAKE_TUNE_FLAGS, so they can be conveniently overridden

Browse Source
This commit is contained in:
Axel Kohlmeyer
2020-03-17 14:48:20 -04:00
parent 5779731da3
commit f893f4f8c7
3 changed files with 21 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
cmake/CMakeLists.txt
View File

@ -53,11 +53,18 @@ include(CheckIncludeFileCXX)
if(${CMAKE_CXX_COMPILER_ID} STREQUAL "Intel")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -restrict")
if (NOT CMAKE_TUNE_FLAGS)
if(CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 17.3 OR CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 17.4)
set(CMAKE_TUNE_FLAGS "-xCOMMON-AVX512")
else()
set(CMAKE_TUNE_FLAGS "-xHost")
endif()
endif()
endif()
if(${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
if(NOT ("${CMAKE_BUILD_TYPE}" STREQUAL "Debug"))
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ffast-math -ftree-vectorize -fexpensive-optimizations")
if(NOT CMAKE_TUNE_FLAGS)
set (CMAKE_TUNE_FLAGS "-ffast-math -march=native")
endif()
endif()
@ -70,22 +77,7 @@ if (${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
option(ENABLE_COVERAGE "Enable code coverage" OFF)
mark_as_advanced(ENABLE_COVERAGE)
if(ENABLE_COVERAGE)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --coverage")
endif()
option(ENABLE_SANITIZE_ADDRESS "Enable address sanitizer" OFF)
mark_as_advanced(ENABLE_SANITIZE_ADDRESS)
if(ENABLE_SANITIZE_ADDRESS)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
endif()
option(ENABLE_SANITIZE_UNDEFINED "Enable undefined behavior sanitizer" OFF)
mark_as_advanced(ENABLE_SANITIZE_UNDEFINED)
if(ENABLE_SANITIZE_UNDEFINED)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined")
endif()
option(ENABLE_SANITIZE_THREAD "Enable thread sanitizer" OFF)
mark_as_advanced(ENABLE_SANITIZE_THREAD)
if(ENABLE_SANITIZE_THREAD)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread")
set (CMAKE_TUNE_FLAGS "--coverage")
endif()
endif()
@ -347,6 +339,10 @@ if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
list(APPEND LAMMPS_LINK_LIBS -lwsock32 -lpsapi)
endif()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_TUNE_FLAGS}")
if(CMAKE_Fortran_FLAGS)
set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${CMAKE_TUNE_FLAGS}")
endif()
########################################################################
# Basic system tests (standard libraries, headers, functions, types) #
########################################################################

5
cmake/Modules/Packages/USER-INTEL.cmake
View File

@ -74,11 +74,6 @@ if(PKG_USER-INTEL)
add_definitions(-DLMP_INTEL_OFFLOAD)
else()
if(CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
if(CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 17.3 OR CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 17.4)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -xCOMMON-AVX512")
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -xHost")
endif()
include(CheckCXXCompilerFlag)
foreach(_FLAG -O2 -fp-model fast=2 -no-prec-div -qoverride-limits -qopt-zmm-usage=high -qno-offload -fno-alias -ansi-alias -restrict)
check_cxx_compiler_flag("${__FLAG}" COMPILER_SUPPORTS${_FLAG})

7
doc/src/Build_basics.rst
View File

@ -213,6 +213,13 @@ A few example command lines are:
For compiling with the Clang/LLVM compilers a special CMake preset is
included that can be loaded with `-C ../cmake/presets/clang.cmake`.
In addition you can set ``CMAKE_TUNE_FLAGS`` to specifically add compiler
flags to tune for optimal performance on given hosts. By default these are
initialized to some compiler specific flags, where known, to optimize the
LAMMPS executable with optimizations and instructions available on the host
where LAMMPS is compiled. For example, for Intel compilers this would be
``-xHost`` and for GNU compilers this would be ``-march=native``.
.. note::
When the cmake command completes, it prints a summary to the screen