274 строки
9.1 KiB
C
274 строки
9.1 KiB
C
/**
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Copyright (c) 2010 Voltaire, Inc. All rights reserved.
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$COPYRIGHT$
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Additional copyrights may follow
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$HEADER$
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*/
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#include "ompi_config.h"
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#include "ompi/constants.h"
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#include "coll_fca.h"
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/**
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* Returns the index of the rank 'ran' in the local ranks group, or -1 if not exists.
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*/
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static inline int __find_local_rank(mca_coll_fca_module_t *fca_module, int rank)
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{
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int i;
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for (i = 0; i < fca_module->num_local_procs; ++i) {
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if (rank == fca_module->local_ranks[i])
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return i;
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}
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return -1;
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}
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static mca_coll_fca_dtype_info_t* mca_coll_fca_get_dtype(ompi_datatype_t *dtype)
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{
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mca_coll_fca_dtype_info_t *dtype_info;
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ptrdiff_t lb, extent;
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int id = dtype->id;
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int fca_dtype;
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if (id < 0 || id >= FCA_DT_MAX_PREDEFINED)
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return NULL;
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dtype_info = &mca_coll_fca_component.fca_dtypes[id];
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if (dtype_info->mpi_dtype == dtype)
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return dtype_info;
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/* assert we don't overwrite another datatype */
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assert(dtype_info->mpi_dtype == MPI_DATATYPE_NULL);
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fca_dtype = mca_coll_fca_component.fca_ops.translate_mpi_dtype(dtype->name);
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if (fca_dtype < 0)
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return NULL;
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FCA_DT_GET_TRUE_EXTENT(dtype, &lb, &extent);
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dtype_info->mpi_dtype = dtype;
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dtype_info->mpi_dtype_extent = extent;
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dtype_info->fca_dtype = fca_dtype;
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dtype_info->fca_dtype_extent = mca_coll_fca_component.fca_ops.get_dtype_size(fca_dtype);
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FCA_VERBOSE(2, "Added new dtype[%d]: %s fca id: %d, mpi size: %d, fca size: %d",
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id, dtype->name, dtype_info->fca_dtype, dtype_info->mpi_dtype_extent,
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dtype_info->fca_dtype_extent);
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return dtype_info;
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}
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static mca_coll_fca_op_info_t *mca_coll_fca_get_op(ompi_op_t *op)
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{
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mca_coll_fca_op_info_t *op_info;
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int i, fca_op;
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/*
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* Find 'op' in the array by exhaustive search. We assume all valid ops are
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* in the beginning. If we stumble on a MPI_OP_NULL, we try to resolve the FCA
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* operation code and store it in the array.
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*/
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op_info = mca_coll_fca_component.fca_reduce_ops;
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for (i = 0; i < FCA_MAX_OPS; ++i, ++op_info) {
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if (op_info->mpi_op == op) {
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return op_info;
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} else if (op_info->mpi_op == MPI_OP_NULL) {
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fca_op = mca_coll_fca_component.fca_ops.translate_mpi_op(op->o_name);
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if (fca_op < 0)
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return NULL;
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op_info->mpi_op = op;
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op_info->fca_op = fca_op;
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FCA_VERBOSE(2, "Added new op[%d]: %s fca id: %d", i, op->o_name, fca_op);
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return op_info;
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}
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}
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/* assert the array does not overflow */
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/*assert(mca_coll_fca_component.fca_reduce_ops[FCA_MAX_OPS - 1] == MPI_OP_NULL);*/
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return NULL;
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}
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static int mca_coll_fca_get_buf_size(ompi_datatype_t *dtype, int count)
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{
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ptrdiff_t true_lb, true_extent;
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FCA_DT_GET_TRUE_EXTENT(dtype, &true_lb, &true_extent);
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/* If the datatype is the same packed as it is unpacked, we
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can save a memory copy and just do the reduction operation
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directly. However, if the representation is not the same, then we need to get a
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receive convertor and a temporary buffer to receive into. */
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if (!FCA_DT_IS_CONTIGUOUS_MEMORY_LAYOUT(dtype, count)) {
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FCA_VERBOSE(5, "Unsupported datatype layout, only contiguous is supported now");
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return OMPI_ERROR;
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}
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/* TODO add support for non-contiguous layout */
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return true_extent * count;
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}
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static int mca_coll_fca_fill_reduce_spec(int count, ompi_datatype_t *dtype,
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ompi_op_t *op, fca_reduce_spec_t *spec,
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int max_fca_payload)
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{
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mca_coll_fca_dtype_info_t *dtype_info;
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mca_coll_fca_op_info_t *op_info;
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/* Check dtype */
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dtype_info = mca_coll_fca_get_dtype(dtype);
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if (!dtype_info) {
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FCA_VERBOSE(10, "Unsupported dtype: %s", dtype->name);
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return OMPI_ERROR;
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}
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/* Check FCA size */
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if (dtype_info->fca_dtype_extent * count > max_fca_payload) {
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FCA_VERBOSE(10, "Unsupported buffer size: %d", dtype_info->fca_dtype_extent * count);
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return OMPI_ERROR;
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}
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/* Check operation */
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op_info = mca_coll_fca_get_op(op);
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if (!op_info) {
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FCA_VERBOSE(10, "Unsupported op: %s", op->o_name);
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return OMPI_ERROR;
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}
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/* Fill spec */
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spec->dtype = dtype_info->fca_dtype;
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spec->op = op_info->fca_op;
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spec->length = count;
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spec->buf_size = dtype_info->mpi_dtype_extent * count;
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if (MPI_IN_PLACE == spec->sbuf) {
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FCA_VERBOSE(10, "Using MPI_IN_PLACE for sbuf");
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spec->sbuf = spec->rbuf;
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} else if (MPI_IN_PLACE == spec->rbuf) {
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FCA_VERBOSE(10, "Using MPI_IN_PLACE for rbuf");
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spec->rbuf = spec->sbuf;
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}
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return OMPI_SUCCESS;
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}
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/*
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* Function: - barrier
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* Returns: - MPI_SUCCESS or error code
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*/
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int mca_coll_fca_barrier(struct ompi_communicator_t *comm,
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mca_coll_base_module_t *module)
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{
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mca_coll_fca_module_t *fca_module = (mca_coll_fca_module_t*)module;
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int ret;
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FCA_VERBOSE(5,"Using FCA Barrier");
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ret = mca_coll_fca_component.fca_ops.do_barrier(fca_module->fca_comm);
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if (ret < 0) {
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FCA_ERROR("Barrier failed: %s", mca_coll_fca_component.fca_ops.strerror(ret));
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return OMPI_ERROR;
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}
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return OMPI_SUCCESS;
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}
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/*
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* Function: - broadcast
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* Accepts: - same arguments as MPI_Bcast()
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* Returns: - MPI_SUCCESS or error code
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*/
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int mca_coll_fca_bcast(void *buff, int count, struct ompi_datatype_t *datatype,
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int root, struct ompi_communicator_t *comm,
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mca_coll_base_module_t *module)
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{
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mca_coll_fca_module_t *fca_module = (mca_coll_fca_module_t*)module;
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fca_bcast_spec_t spec;
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int ret;
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FCA_VERBOSE(5,"[%d] Calling mca_coll_fca_bcast, root=%d, count=%d",
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ompi_comm_rank(comm), root, count);
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spec.size = mca_coll_fca_get_buf_size(datatype, count);
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if (spec.size < 0 || spec.size > fca_module->fca_comm_caps.max_payload) {
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FCA_VERBOSE(5, "Unsupported bcast operation, dtype=%s[%d] using fallback\n",
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datatype->name, count);
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return fca_module->previous_bcast(buff, count, datatype, root, comm,
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fca_module->previous_bcast_module);
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}
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FCA_VERBOSE(5,"Using FCA Bcast");
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spec.buf = buff;
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spec.root_indx = __find_local_rank(fca_module, root);
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ret = mca_coll_fca_component.fca_ops.do_bcast(fca_module->fca_comm, &spec);
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if (ret < 0) {
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FCA_ERROR("Bcast failed: %s", mca_coll_fca_component.fca_ops.strerror(ret));
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return OMPI_ERROR;
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}
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return OMPI_SUCCESS;
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}
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/*
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* Reduce
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*
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* Function: - reduce
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* Accepts: - same as MPI_Reduce()
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* Returns: - MPI_SUCCESS or error code
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*/
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int mca_coll_fca_reduce(void *sbuf, void *rbuf, int count,
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struct ompi_datatype_t *dtype, struct ompi_op_t *op,
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int root, struct ompi_communicator_t *comm,
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mca_coll_base_module_t *module)
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{
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mca_coll_fca_module_t *fca_module = (mca_coll_fca_module_t*)module;
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fca_reduce_spec_t spec;
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int ret;
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spec.is_root = fca_module->rank == root;
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spec.sbuf = sbuf;
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spec.rbuf = rbuf;
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if (mca_coll_fca_fill_reduce_spec(count, dtype, op, &spec, fca_module->fca_comm_caps.max_payload)
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!= OMPI_SUCCESS) {
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FCA_VERBOSE(5, "Unsupported reduce operation %s, using fallback\n", op->o_name);
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return fca_module->previous_reduce(sbuf, rbuf, count, dtype, op, root,
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comm, fca_module->previous_reduce_module);
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}
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FCA_VERBOSE(5,"Using FCA Reduce");
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ret = mca_coll_fca_component.fca_ops.do_reduce(fca_module->fca_comm, &spec);
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if (ret < 0) {
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FCA_ERROR("Reduce failed: %s", mca_coll_fca_component.fca_ops.strerror(ret));
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return OMPI_ERROR;
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}
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return OMPI_SUCCESS;
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}
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/*
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* Allreduce
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*
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* Function: - allreduce
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* Accepts: - same as MPI_Allreduce()
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* Returns: - MPI_SUCCESS or error code
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*/
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int mca_coll_fca_allreduce(void *sbuf, void *rbuf, int count,
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struct ompi_datatype_t *dtype, struct ompi_op_t *op,
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struct ompi_communicator_t *comm,
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mca_coll_base_module_t *module)
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{
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mca_coll_fca_module_t *fca_module = (mca_coll_fca_module_t*)module;
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fca_reduce_spec_t spec;
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int ret;
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spec.sbuf = sbuf;
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spec.rbuf = rbuf;
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if (mca_coll_fca_fill_reduce_spec(count, dtype, op, &spec, fca_module->fca_comm_caps.max_payload)
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!= OMPI_SUCCESS) {
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FCA_VERBOSE(5, "Unsupported allreduce operation %s, using fallback\n", op->o_name);
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return fca_module->previous_allreduce(sbuf, rbuf, count, dtype, op,
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comm, fca_module->previous_allreduce_module);
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}
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FCA_VERBOSE(5,"Using FCA Allreduce");
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ret = mca_coll_fca_component.fca_ops.do_all_reduce(fca_module->fca_comm, &spec);
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if (ret < 0) {
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FCA_ERROR("Allreduce failed: %s", mca_coll_fca_component.fca_ops.strerror(ret));
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return OMPI_ERROR;
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}
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return OMPI_SUCCESS;
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}
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