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updates and formatting

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Wes Bethel 2023-10-05 06:37:13 -07:00
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commit e75b3d5240
1 changed files with 30 additions and 33 deletions
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README.md
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@ -38,37 +38,6 @@ To build and run this code, you need to have the following software tools instal
`% cmake ../` # cmake generates lots of output
`% make` # to build the programs
# Additional build options -- Compiler Optimization Level
By default, the CMakeLists.txt will do a "Release" build, which means there will be full compiler optimizations.
There are two methods for modifying the compiler optimization level.
Option 1 (best approach): set the CMAKE_CXX_FLAGS_RELEASE environment variable then run cmake
For full optimization:
bash users:
% export CMAKE_CXX_FLAGS_RELEASE="-O3"
csh users:
% setenv CMAKE_CXX_FLAGS_RELEASE "-O3"
For no optimization:
bash users:
% export CMAKE_CXX_FLAGS_RELEASE="-O0"
csh users:
% setenv CMAKE_CXX_FLAGS_RELEASE "-O0"
Then, after setting the CMAKE_CXX_FLAGS_RELEASE environment variable, clean your build directory, and rerun cmake and then make.
Option 2 (works but not preferred): uncomment one of the following two lines then run/rerun cmake:
For -O3: full optimization
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
For -O0: no optimization in gcc/g++
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O0")
After modifying CMakeLists.txt, clean your build directory, and rerun cmake and then make.
# Adding your code
@ -120,9 +89,37 @@ Once you are on an interactive CPU node, run each of the codes using these comma
`srun ./sum_vector`
# Building and running the codes on Cori@NERSC (deprecated as of March 2023)
# Additional build options -- Compiler Optimization Level
Please refer to lecture slides for additional information about accessing Perlmutter@NERSC, building your code there, and running your code there.
By default, the CMakeLists.txt will do a "Release" build, which means there will be full compiler optimizations.
There are two methods for modifying the compiler optimization level.
Option 1 (best approach): set the CMAKE_CXX_FLAGS_RELEASE environment variable then run cmake
For full optimization:
bash users:
% export CMAKE_CXX_FLAGS_RELEASE="-O3"
csh users:
% setenv CMAKE_CXX_FLAGS_RELEASE "-O3"
For no optimization:
bash users:
% export CMAKE_CXX_FLAGS_RELEASE="-O0"
csh users:
% setenv CMAKE_CXX_FLAGS_RELEASE "-O0"
Then, after setting the CMAKE_CXX_FLAGS_RELEASE environment variable, clean your build directory, and rerun cmake and then make.
Option 2 (works but not preferred): uncomment one of the following two lines then run/rerun cmake:
For -O3: full optimization
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
For -O0: no optimization in gcc/g++
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O0")
After modifying CMakeLists.txt, clean your build directory, and rerun cmake and then make.
# EOF