Comments (3)
It would be nice to have this documented in the OpenMPI documentation.
Agreed, should probably be documented better @Akshay-Venkatesh
@gonzalobg Thanks for the proposal, would you mind joining a dev call and pitch the proposal?
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For mpi applications just the wrapper will do.
For building .cu object files and link with mpi.
Build the .cu objects and .c objects, and link them with the mpi wrapper.
from ompi.
Thanks. This:
module load mpi cuda
mpicc -c main.c -o main.o
nvcc -c multiply.cu -o multiply.o
mpicc main.o multiply.o -lcudart
does not cover how to build a main.cu
with the mpi wrapper.
That is, given a single GPU application in which all files, including main.cu
, are .cu
files, and a user wants to drop in some MPI calls here and there to turn it into a multi-GPU application, how does the user do that?
It would be nice to have this documented in the OpenMPI documentation.
Ideally it would be as easy as:
modue load mpi cuda
mpi___ -c main.cu -o main.o
mpi___ -c multiply.cu -o multiply.o
mpi___ main.o multiply.o
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