+/* Copyright (c) 2013-2014. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
#include "colls_private.h"
#ifndef NUM_CORE
#define NUM_CORE 8
MPI_Aint rextent, sextent;
rextent = smpi_datatype_get_extent(rtype);
sextent = smpi_datatype_get_extent(stype);
- int tag = 50;
- MPI_Request request;
- MPI_Request rrequest_array[128];
+ int tag = COLL_TAG_ALLGATHER;
- MPI_Status status;
int i, send_offset, recv_offset;
int intra_rank, inter_rank;
- intra_rank = rank % NUM_CORE;
- inter_rank = rank / NUM_CORE;
- int inter_comm_size = (comm_size + NUM_CORE - 1) / NUM_CORE;
- int num_core_in_current_smp = NUM_CORE;
+
+ int num_core = simcall_host_get_core(SIMIX_host_self());
+ // do we use the default one or the number of cores in the platform ?
+ // if the number of cores is one, the platform may be simulated with 1 node = 1 core
+ if (num_core == 1) num_core = NUM_CORE;
+
+
+ intra_rank = rank % num_core;
+ inter_rank = rank / num_core;
+ int inter_comm_size = (comm_size + num_core - 1) / num_core;
+ int num_core_in_current_smp = num_core;
+
+ if(comm_size%num_core)
+ THROWF(arg_error,0, "allgather SMP NTS algorithm can't be used with non multiple of NUM_CORE=%d number of processes ! ", num_core);
/* for too small number of processes, use default implementation */
- if (comm_size <= NUM_CORE) {
+ if (comm_size <= num_core) {
XBT_WARN("MPI_allgather_SMP_NTS use default MPI_allgather.");
smpi_mpi_allgather(sbuf, scount, stype, rbuf, rcount, rtype, comm);
return MPI_SUCCESS;
// the last SMP node may have fewer number of running processes than all others
if (inter_rank == (inter_comm_size - 1)) {
- num_core_in_current_smp = comm_size - (inter_rank * NUM_CORE);
+ num_core_in_current_smp = comm_size - (inter_rank * num_core);
}
//copy corresponding message from sbuf to rbuf
recv_offset = rank * rextent * rcount;
smpi_mpi_sendrecv(sbuf, scount, stype, rank, tag,
((char *) rbuf + recv_offset), rcount, rtype, rank, tag, comm,
- &status);
+ MPI_STATUS_IGNORE);
//gather to root of each SMP
for (i = 1; i < num_core_in_current_smp; i++) {
dst =
- (inter_rank * NUM_CORE) + (intra_rank + i) % (num_core_in_current_smp);
+ (inter_rank * num_core) + (intra_rank + i) % (num_core_in_current_smp);
src =
- (inter_rank * NUM_CORE) + (intra_rank - i +
+ (inter_rank * num_core) + (intra_rank - i +
num_core_in_current_smp) %
(num_core_in_current_smp);
recv_offset = src * rextent * rcount;
smpi_mpi_sendrecv(sbuf, scount, stype, dst, tag,
((char *) rbuf + recv_offset), rcount, rtype, src, tag, comm,
- &status);
+ MPI_STATUS_IGNORE);
}
// root of each SMP
if (intra_rank == 0) {
- src = ((inter_rank - 1 + inter_comm_size) % inter_comm_size) * NUM_CORE;
- dst = ((inter_rank + 1) % inter_comm_size) * NUM_CORE;
+ MPI_Request *rrequest_array = xbt_new(MPI_Request, inter_comm_size - 1);
+ MPI_Request *srequest_array = xbt_new(MPI_Request, inter_comm_size - 1);
+
+ src = ((inter_rank - 1 + inter_comm_size) % inter_comm_size) * num_core;
+ dst = ((inter_rank + 1) % inter_comm_size) * num_core;
// post all inter Irecv
for (i = 0; i < inter_comm_size - 1; i++) {
recv_offset =
((inter_rank - i - 1 +
- inter_comm_size) % inter_comm_size) * NUM_CORE * sextent * scount;
- rrequest_array[i] = smpi_mpi_irecv((char *)rbuf+recv_offset, rcount * NUM_CORE, rtype, src, tag+i, comm);
+ inter_comm_size) % inter_comm_size) * num_core * sextent * scount;
+ rrequest_array[i] = smpi_mpi_irecv((char *)rbuf + recv_offset, rcount * num_core,
+ rtype, src, tag + i, comm);
}
// send first message
send_offset =
((inter_rank +
- inter_comm_size) % inter_comm_size) * NUM_CORE * sextent * scount;
- smpi_mpi_isend((char *) rbuf + send_offset, scount * NUM_CORE, stype,
- dst, tag, comm);
+ inter_comm_size) % inter_comm_size) * num_core * sextent * scount;
+ srequest_array[0] = smpi_mpi_isend((char *)rbuf + send_offset, scount * num_core,
+ stype, dst, tag, comm);
// loop : recv-inter , send-inter, send-intra (linear-bcast)
for (i = 0; i < inter_comm_size - 2; i++) {
recv_offset =
((inter_rank - i - 1 +
- inter_comm_size) % inter_comm_size) * NUM_CORE * sextent * scount;
- smpi_mpi_wait(&rrequest_array[i], &status);
- smpi_mpi_isend((char *) rbuf + recv_offset, scount * NUM_CORE, stype,
- dst, tag + i + 1, comm);
+ inter_comm_size) % inter_comm_size) * num_core * sextent * scount;
+ smpi_mpi_wait(&rrequest_array[i], MPI_STATUS_IGNORE);
+ srequest_array[i + 1] = smpi_mpi_isend((char *)rbuf + recv_offset, scount * num_core,
+ stype, dst, tag + i + 1, comm);
if (num_core_in_current_smp > 1) {
- request = smpi_mpi_isend((char *) rbuf + recv_offset, scount * NUM_CORE, stype,
- (rank + 1), tag + i + 1, comm);
+ smpi_mpi_send((char *)rbuf + recv_offset, scount * num_core,
+ stype, (rank + 1), tag + i + 1, comm);
}
}
// recv last message and send_intra
recv_offset =
((inter_rank - i - 1 +
- inter_comm_size) % inter_comm_size) * NUM_CORE * sextent * scount;
- //recv_offset = ((inter_rank + 1) % inter_comm_size) * NUM_CORE * sextent * scount;
+ inter_comm_size) % inter_comm_size) * num_core * sextent * scount;
+ //recv_offset = ((inter_rank + 1) % inter_comm_size) * num_core * sextent * scount;
//i=inter_comm_size-2;
- smpi_mpi_wait(&rrequest_array[i], &status);
+ smpi_mpi_wait(&rrequest_array[i], MPI_STATUS_IGNORE);
if (num_core_in_current_smp > 1) {
- request = smpi_mpi_isend((char *) rbuf + recv_offset, scount * NUM_CORE, stype,
- (rank + 1), tag + i + 1, comm);
+ smpi_mpi_send((char *)rbuf + recv_offset, scount * num_core,
+ stype, (rank + 1), tag + i + 1, comm);
}
+
+ smpi_mpi_waitall(inter_comm_size - 1, srequest_array, MPI_STATUSES_IGNORE);
+ xbt_free(rrequest_array);
+ xbt_free(srequest_array);
}
// last rank of each SMP
else if (intra_rank == (num_core_in_current_smp - 1)) {
for (i = 0; i < inter_comm_size - 1; i++) {
recv_offset =
((inter_rank - i - 1 +
- inter_comm_size) % inter_comm_size) * NUM_CORE * sextent * scount;
- request = smpi_mpi_irecv((char *) rbuf + recv_offset, (rcount * NUM_CORE), rtype,
- rank - 1, tag + i + 1, comm);
- smpi_mpi_wait(&request, &status);
+ inter_comm_size) % inter_comm_size) * num_core * sextent * scount;
+ smpi_mpi_recv((char *) rbuf + recv_offset, (rcount * num_core), rtype,
+ rank - 1, tag + i + 1, comm, MPI_STATUS_IGNORE);
}
}
// intermediate rank of each SMP
for (i = 0; i < inter_comm_size - 1; i++) {
recv_offset =
((inter_rank - i - 1 +
- inter_comm_size) % inter_comm_size) * NUM_CORE * sextent * scount;
- request = smpi_mpi_irecv((char *) rbuf + recv_offset, (rcount * NUM_CORE), rtype,
- rank - 1, tag + i + 1, comm);
- smpi_mpi_wait(&request, &status);
- request = smpi_mpi_isend((char *) rbuf + recv_offset, (scount * NUM_CORE), stype,
- (rank + 1), tag + i + 1, comm);
+ inter_comm_size) % inter_comm_size) * num_core * sextent * scount;
+ smpi_mpi_recv((char *) rbuf + recv_offset, (rcount * num_core), rtype,
+ rank - 1, tag + i + 1, comm, MPI_STATUS_IGNORE);
+ smpi_mpi_send((char *) rbuf + recv_offset, (scount * num_core), stype,
+ (rank + 1), tag + i + 1, comm);
}
}
