/* selector for collective algorithms based on mpich decision logic */
-/* Copyright (c) 2009-2019. The SimGrid Team.
+/* Copyright (c) 2009-2022. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
#include "colls_private.hpp"
+#include <memory>
+
/* This is the default implementation of allreduce. The algorithm is:
Algorithm: MPI_Allreduce
*/
namespace simgrid{
namespace smpi{
-int Coll_allreduce_mpich::allreduce(const void *sbuf, void *rbuf, int count,
+int allreduce__mpich(const void *sbuf, void *rbuf, int count,
MPI_Datatype dtype, MPI_Op op, MPI_Comm comm)
{
size_t dsize, block_dsize;
block_dsize = dsize * count;
/*MPICH uses SMP algorithms for all commutative ops now*/
- if(!comm->is_smp_comm()){
+ if (not comm->is_smp_comm()) {
if(comm->get_leaders_comm()==MPI_COMM_NULL){
comm->init_smp();
}
if(op->is_commutative())
- return Coll_allreduce_mvapich2_two_level::allreduce (sbuf, rbuf,count, dtype, op, comm);
+ return allreduce__mvapich2_two_level(sbuf, rbuf,count, dtype, op, comm);
}
/* find nearest power-of-two less than or equal to comm_size */
if (block_dsize > large_message && count >= pof2 && (op==MPI_OP_NULL || op->is_commutative())) {
//for long messages
- return Coll_allreduce_rab_rdb::allreduce (sbuf, rbuf, count, dtype, op, comm);
+ return allreduce__rab_rdb(sbuf, rbuf, count, dtype, op, comm);
}else {
//for short ones and count < pof2
- return Coll_allreduce_rdb::allreduce (sbuf, rbuf, count, dtype, op, comm);
+ return allreduce__rdb(sbuf, rbuf, count, dtype, op, comm);
}
}
End Algorithm: MPI_Alltoall
*/
-int Coll_alltoall_mpich::alltoall(const void *sbuf, int scount,
- MPI_Datatype sdtype,
- void* rbuf, int rcount,
- MPI_Datatype rdtype,
- MPI_Comm comm)
+int alltoall__mpich(const void *sbuf, int scount,
+ MPI_Datatype sdtype,
+ void* rbuf, int rcount,
+ MPI_Datatype rdtype,
+ MPI_Comm comm)
{
int communicator_size;
size_t dsize, block_dsize;
block_dsize = dsize * scount;
if ((block_dsize < short_size) && (communicator_size >= 8)) {
- return Coll_alltoall_bruck::alltoall(sbuf, scount, sdtype,
- rbuf, rcount, rdtype,
- comm);
+ return alltoall__bruck(sbuf, scount, sdtype,
+ rbuf, rcount, rdtype,
+ comm);
} else if (block_dsize < medium_size) {
- return Coll_alltoall_mvapich2_scatter_dest::alltoall(sbuf, scount, sdtype,
- rbuf, rcount, rdtype,
- comm);
+ return alltoall__mvapich2_scatter_dest(sbuf, scount, sdtype,
+ rbuf, rcount, rdtype,
+ comm);
}else if (communicator_size%2){
- return Coll_alltoall_pair::alltoall(sbuf, scount, sdtype,
- rbuf, rcount, rdtype,
- comm);
+ return alltoall__pair(sbuf, scount, sdtype,
+ rbuf, rcount, rdtype,
+ comm);
}
- return Coll_alltoall_ring::alltoall (sbuf, scount, sdtype,
- rbuf, rcount, rdtype,
- comm);
+ return alltoall__ring(sbuf, scount, sdtype,
+ rbuf, rcount, rdtype,
+ comm);
}
-int Coll_alltoallv_mpich::alltoallv(const void *sbuf, const int *scounts, const int *sdisps,
- MPI_Datatype sdtype,
- void *rbuf, const int *rcounts, const int *rdisps,
- MPI_Datatype rdtype,
- MPI_Comm comm
- )
+int alltoallv__mpich(const void *sbuf, const int *scounts, const int *sdisps,
+ MPI_Datatype sdtype,
+ void *rbuf, const int *rcounts, const int *rdisps,
+ MPI_Datatype rdtype,
+ MPI_Comm comm
+ )
{
/* For starters, just keep the original algorithm. */
- return Coll_alltoallv_bruck::alltoallv(sbuf, scounts, sdisps, sdtype,
- rbuf, rcounts, rdisps,rdtype,
- comm);
+ return alltoallv__bruck(sbuf, scounts, sdisps, sdtype,
+ rbuf, rcounts, rdisps,rdtype,
+ comm);
}
-int Coll_barrier_mpich::barrier(MPI_Comm comm)
+int barrier__mpich(MPI_Comm comm)
{
- return Coll_barrier_ompi_bruck::barrier(comm);
+ return barrier__ompi_bruck(comm);
}
/* This is the default implementation of broadcast. The algorithm is:
*/
-int Coll_bcast_mpich::bcast(void *buff, int count,
- MPI_Datatype datatype, int root,
- MPI_Comm comm
+int bcast__mpich(void *buff, int count,
+ MPI_Datatype datatype, int root,
+ MPI_Comm comm
)
{
/* Decision function based on MX results for
//int segsize = 0;
size_t message_size, dsize;
- if(!comm->is_smp_comm()){
+ if (not comm->is_smp_comm()) {
if(comm->get_leaders_comm()==MPI_COMM_NULL){
comm->init_smp();
}
if(comm->is_uniform())
- return Coll_bcast_SMP_binomial::bcast(buff, count, datatype, root, comm);
+ return bcast__SMP_binomial(buff, count, datatype, root, comm);
}
communicator_size = comm->size();
single-element broadcasts */
if ((message_size < small_message_size) || (communicator_size <= 8)) {
/* Binomial without segmentation */
- return Coll_bcast_binomial_tree::bcast (buff, count, datatype,
- root, comm);
+ return bcast__binomial_tree(buff, count, datatype, root, comm);
} else if (message_size < intermediate_message_size && !(communicator_size%2)) {
// SplittedBinary with 1KB segments
- return Coll_bcast_scatter_rdb_allgather::bcast(buff, count, datatype,
- root, comm);
+ return bcast__scatter_rdb_allgather(buff, count, datatype, root, comm);
}
//Handle large message sizes
- return Coll_bcast_scatter_LR_allgather::bcast (buff, count, datatype,
- root, comm);
+ return bcast__scatter_LR_allgather(buff, count, datatype, root, comm);
}
*/
-int Coll_reduce_mpich::reduce(const void *sendbuf, void *recvbuf,
+int reduce__mpich(const void *sendbuf, void *recvbuf,
int count, MPI_Datatype datatype,
MPI_Op op, int root,
MPI_Comm comm
int communicator_size=0;
size_t message_size, dsize;
- if(!comm->is_smp_comm()){
+ if (not comm->is_smp_comm()) {
if(comm->get_leaders_comm()==MPI_COMM_NULL){
comm->init_smp();
}
if (op->is_commutative() == 1)
- return Coll_reduce_mvapich2_two_level::reduce(sendbuf, recvbuf, count, datatype, op, root, comm);
+ return reduce__mvapich2_two_level(sendbuf, recvbuf, count, datatype, op, root, comm);
}
communicator_size = comm->size();
pof2 >>= 1;
if ((count < pof2) || (message_size < 2048) || (op != MPI_OP_NULL && not op->is_commutative())) {
- return Coll_reduce_binomial::reduce(sendbuf, recvbuf, count, datatype, op, root, comm);
+ return reduce__binomial(sendbuf, recvbuf, count, datatype, op, root, comm);
}
- return Coll_reduce_scatter_gather::reduce(sendbuf, recvbuf, count, datatype, op, root, comm);
+ return reduce__scatter_gather(sendbuf, recvbuf, count, datatype, op, root, comm);
}
*/
-int Coll_reduce_scatter_mpich::reduce_scatter(const void *sbuf, void *rbuf,
- const int *rcounts,
- MPI_Datatype dtype,
- MPI_Op op,
- MPI_Comm comm
- )
+int reduce_scatter__mpich(const void *sbuf, void *rbuf,
+ const int *rcounts,
+ MPI_Datatype dtype,
+ MPI_Op op,
+ MPI_Comm comm
+ )
{
int comm_size, i;
size_t total_message_size;
}
if( (op==MPI_OP_NULL || op->is_commutative()) && total_message_size > 524288) {
- return Coll_reduce_scatter_mpich_pair::reduce_scatter (sbuf, rbuf, rcounts,
- dtype, op,
- comm);
+ return reduce_scatter__mpich_pair(sbuf, rbuf, rcounts, dtype, op, comm);
} else if ((op != MPI_OP_NULL && not op->is_commutative())) {
- int is_block_regular = 1;
+ bool is_block_regular = true;
for (i = 0; i < (comm_size - 1); ++i) {
if (rcounts[i] != rcounts[i + 1]) {
- is_block_regular = 0;
+ is_block_regular = false;
break;
}
}
if (pof2 == comm_size && is_block_regular) {
/* noncommutative, pof2 size, and block regular */
- return Coll_reduce_scatter_mpich_noncomm::reduce_scatter(sbuf, rbuf, rcounts, dtype, op, comm);
+ return reduce_scatter__mpich_noncomm(sbuf, rbuf, rcounts, dtype, op, comm);
}
- return Coll_reduce_scatter_mpich_rdb::reduce_scatter(sbuf, rbuf, rcounts, dtype, op, comm);
+ return reduce_scatter__mpich_rdb(sbuf, rbuf, rcounts, dtype, op, comm);
}else{
- return Coll_reduce_scatter_mpich_rdb::reduce_scatter(sbuf, rbuf, rcounts, dtype, op, comm);
+ return reduce_scatter__mpich_rdb(sbuf, rbuf, rcounts, dtype, op, comm);
}
}
End Algorithm: MPI_Allgather
*/
-int Coll_allgather_mpich::allgather(const void *sbuf, int scount,
- MPI_Datatype sdtype,
- void* rbuf, int rcount,
- MPI_Datatype rdtype,
- MPI_Comm comm
- )
+int allgather__mpich(const void *sbuf, int scount,
+ MPI_Datatype sdtype,
+ void* rbuf, int rcount,
+ MPI_Datatype rdtype,
+ MPI_Comm comm
+ )
{
int communicator_size, pow2_size;
size_t dsize, total_dsize;
- for everything else use ring.
*/
if ((pow2_size == communicator_size) && (total_dsize < 524288)) {
- return Coll_allgather_rdb::allgather(sbuf, scount, sdtype,
- rbuf, rcount, rdtype,
- comm);
+ return allgather__rdb(sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
} else if (total_dsize <= 81920) {
- return Coll_allgather_bruck::allgather(sbuf, scount, sdtype,
- rbuf, rcount, rdtype,
- comm);
+ return allgather__bruck(sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
}
- return Coll_allgather_ring::allgather(sbuf, scount, sdtype,
- rbuf, rcount, rdtype,
- comm);
+ return allgather__ring(sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
}
End Algorithm: MPI_Allgatherv
*/
-int Coll_allgatherv_mpich::allgatherv(const void *sbuf, int scount,
- MPI_Datatype sdtype,
- void* rbuf, const int *rcounts,
- const int *rdispls,
- MPI_Datatype rdtype,
- MPI_Comm comm
- )
+int allgatherv__mpich(const void *sbuf, int scount,
+ MPI_Datatype sdtype,
+ void* rbuf, const int *rcounts,
+ const int *rdispls,
+ MPI_Datatype rdtype,
+ MPI_Comm comm
+ )
{
int communicator_size, pow2_size,i;
size_t total_dsize;
for (pow2_size = 1; pow2_size < communicator_size; pow2_size <<=1);
if ((pow2_size == communicator_size) && (total_dsize < 524288)) {
- return Coll_allgatherv_mpich_rdb::allgatherv(sbuf, scount, sdtype,
- rbuf, rcounts, rdispls, rdtype,
- comm);
+ return allgatherv__mpich_rdb(sbuf, scount, sdtype, rbuf, rcounts, rdispls, rdtype, comm);
} else if (total_dsize <= 81920) {
- return Coll_allgatherv_ompi_bruck::allgatherv(sbuf, scount, sdtype,
- rbuf, rcounts, rdispls, rdtype,
- comm);
+ return allgatherv__ompi_bruck(sbuf, scount, sdtype, rbuf, rcounts, rdispls, rdtype, comm);
}
- return Coll_allgatherv_mpich_ring::allgatherv(sbuf, scount, sdtype,
- rbuf, rcounts, rdispls, rdtype,
- comm);
+ return allgatherv__mpich_ring(sbuf, scount, sdtype, rbuf, rcounts, rdispls, rdtype, comm);
}
/* This is the default implementation of gather. The algorithm is:
End Algorithm: MPI_Gather
*/
-int Coll_gather_mpich::gather(const void *sbuf, int scount,
- MPI_Datatype sdtype,
- void* rbuf, int rcount,
- MPI_Datatype rdtype,
- int root,
- MPI_Comm comm
- )
+int gather__mpich(const void *sbuf, int scount,
+ MPI_Datatype sdtype,
+ void* rbuf, int rcount,
+ MPI_Datatype rdtype,
+ int root,
+ MPI_Comm comm
+ )
{
- return Coll_gather_ompi_binomial::gather (sbuf, scount, sdtype,
- rbuf, rcount, rdtype,
- root, comm);
+ return gather__ompi_binomial(sbuf, scount, sdtype,
+ rbuf, rcount, rdtype,
+ root, comm);
}
/* This is the default implementation of scatter. The algorithm is:
*/
-int Coll_scatter_mpich::scatter(const void *sbuf, int scount,
- MPI_Datatype sdtype,
- void* rbuf, int rcount,
- MPI_Datatype rdtype,
- int root, MPI_Comm comm
- )
+int scatter__mpich(const void *sbuf, int scount,
+ MPI_Datatype sdtype,
+ void* rbuf, int rcount,
+ MPI_Datatype rdtype,
+ int root, MPI_Comm comm
+ )
{
std::unique_ptr<unsigned char[]> tmp_buf;
if(comm->rank()!=root){
- tmp_buf.reset(new unsigned char[rcount * rdtype->get_extent()]);
+ tmp_buf = std::make_unique<unsigned char[]>(rcount * rdtype->get_extent());
sbuf = tmp_buf.get();
scount = rcount;
sdtype = rdtype;
}
- return Coll_scatter_ompi_binomial::scatter(sbuf, scount, sdtype, rbuf, rcount, rdtype, root, comm);
+ return scatter__ompi_binomial(sbuf, scount, sdtype, rbuf, rcount, rdtype, root, comm);
}
}
}
