I'm trying to build a CUDA kernel into OpenMPI (because I'm experimenting
with an Allreduce collective with data in GPU buffers, and I want the GPU
to do the reduction).
This involves writing a '.cu' file, and compiling this to '.o' with the
NVIDIA CUDA compiler 'nvcc'; and also writing some of OpenMPI in C++ to
interface with the CUDA kernel.
I've revised the Makefile.am in the relevant directory to look like (there
is more, but this is the relevant section)
sources = \
coll_ibm.h \
coll_ibm_component.c \
coll_ibm_module.c \
coll_ibm_allgather.c \
coll_ibm_allgatherv.c \
coll_ibm_allreduce.c \
coll_ibm_alltoall.c \
coll_ibm_alltoallv.c \
coll_ibm_barrier.c \
coll_ibm_bcast.c \
coll_ibm_exscan.c \
coll_ibm_gather.c \
coll_ibm_gatherv.c \
coll_ibm_reduce.c \
coll_ibm_reduce_scatter.c \
coll_ibm_reduce_scatter_block.c \
coll_ibm_scan.c \
coll_ibm_scatter.c \
coll_ibm_scatterv.c \
allreduce_overlap.cc \
comm_gpu.cu
SUFFIXES = .cu
comm_gpu.lo: comm_gpu.cu
/usr/local/cuda/bin/nvcc -gencode arch=compute_60,code=sm_60
-lcuda -O3 --compiler-options "-O2 -fopenmp -mcpu=power8 -fPIC" -c
comm_gpu.cu
mv comm_gpu.o comm_gpu.lo
The C++ compile runs OK; but the attempt to run 'nvcc' is ignored; the
build completed, but no comm_gpu.lo is generated, and as far as I can
tell, the library for this directory is built without the comm_gpu.lo
object.
What do I need to put in the Makefile.am to get this to build properly ?
T J (Chris) Ward, IBM Research.
Scalable Data-Centric Computing - Active Storage Fabrics - IBM System
BlueGene
IBM United Kingdom Ltd., Hursley Park, Winchester, Hants, SO21 2JN
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