* Copyright (c) 1991-2000, University of Groningen, The Netherlands.
* Copyright (c) 2001-2004, The GROMACS development team.
* Copyright (c) 2013,2014,2015,2016,2017 by the GROMACS development team.
- * Copyright (c) 2018,2019,2020, by the GROMACS development team, led by
+ * Copyright (c) 2018,2019,2020,2021, by the GROMACS development team, led by
* Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
* and including many others, as listed in the AUTHORS file in the
* top-level source directory and at http://www.gromacs.org.
// For now, we want things to go horribly wrong if this is used too early...
// TODO: Remove when communicators are removed from commrec (#2395)
- cr->nnodes = -1;
- cr->nodeid = -1;
- cr->sim_nodeid = -1;
- cr->mpi_comm_mysim = MPI_COMM_NULL;
- cr->mpi_comm_mygroup = MPI_COMM_NULL;
+ cr->nnodes = -1;
+ cr->sizeOfMyGroupCommunicator = -1;
+ cr->nodeid = -1;
+ cr->sim_nodeid = -1;
+ cr->mpi_comm_mysim = MPI_COMM_NULL;
+ cr->mpi_comm_mygroup = MPI_COMM_NULL;
// TODO cr->duty should not be initialized here
cr->duty = (DUTY_PP | DUTY_PME);
nc->bUse = TRUE;
if (fplog)
{
- fprintf(fplog, "Using two step summing over %d groups of on average %.1f ranks\n\n", ng,
- (real)n / (real)ng);
+ fprintf(fplog,
+ "Using two step summing over %d groups of on average %.1f ranks\n\n",
+ ng,
+ real(n) / real(ng));
}
if (nc->rank_intra > 0)
{
void gmx_barrier(MPI_Comm gmx_unused communicator)
{
+ if (communicator == MPI_COMM_NULL)
+ {
+ return;
+ }
#if !GMX_MPI
GMX_RELEASE_ASSERT(false, "Invalid call to gmx_barrier");
#else
void gmx_bcast(int gmx_unused nbytes, void gmx_unused* b, MPI_Comm gmx_unused communicator)
{
-#if !GMX_MPI
- GMX_RELEASE_ASSERT(false, "Invalid call to gmx_bcast");
-#else
+ // Without MPI we have a single rank, so bcast is a no-op
+#if GMX_MPI
MPI_Bcast(b, nbytes, MPI_BYTE, 0, communicator);
#endif
}
void gmx_sumd(int gmx_unused nr, double gmx_unused r[], const t_commrec gmx_unused* cr)
{
-#if !GMX_MPI
- GMX_RELEASE_ASSERT(false, "Invalid call to gmx_sumd");
-#else
-# if MPI_IN_PLACE_EXISTS
+ // Without MPI we have a single rank, so sum is a no-op
+#if GMX_MPI
+ if (cr->sizeOfMyGroupCommunicator == 1)
+ {
+ return;
+ }
+
if (cr->nc.bUse)
{
if (cr->nc.rank_intra == 0)
{
MPI_Allreduce(MPI_IN_PLACE, r, nr, MPI_DOUBLE, MPI_SUM, cr->mpi_comm_mygroup);
}
-# else
- int i;
-
- if (nr > cr->mpb->dbuf_alloc)
- {
- cr->mpb->dbuf_alloc = nr;
- srenew(cr->mpb->dbuf, cr->mpb->dbuf_alloc);
- }
- if (cr->nc.bUse)
- {
- /* Use two step summing */
- MPI_Allreduce(r, cr->mpb->dbuf, nr, MPI_DOUBLE, MPI_SUM, cr->nc.comm_intra);
- if (cr->nc.rank_intra == 0)
- {
- /* Sum with the buffers reversed */
- MPI_Allreduce(cr->mpb->dbuf, r, nr, MPI_DOUBLE, MPI_SUM, cr->nc.comm_inter);
- }
- MPI_Bcast(r, nr, MPI_DOUBLE, 0, cr->nc.comm_intra);
- }
- else
- {
- MPI_Allreduce(r, cr->mpb->dbuf, nr, MPI_DOUBLE, MPI_SUM, cr->mpi_comm_mygroup);
- for (i = 0; i < nr; i++)
- {
- r[i] = cr->mpb->dbuf[i];
- }
- }
-# endif
#endif
}
void gmx_sumf(int gmx_unused nr, float gmx_unused r[], const t_commrec gmx_unused* cr)
{
-#if !GMX_MPI
- GMX_RELEASE_ASSERT(false, "Invalid call to gmx_sumf");
-#else
-# if MPI_IN_PLACE_EXISTS
+ // Without MPI we have a single rank, so sum is a no-op
+#if GMX_MPI
+ if (cr->sizeOfMyGroupCommunicator == 1)
+ {
+ return;
+ }
+
if (cr->nc.bUse)
{
/* Use two step summing. */
{
MPI_Allreduce(MPI_IN_PLACE, r, nr, MPI_FLOAT, MPI_SUM, cr->mpi_comm_mygroup);
}
-# else
- int i;
-
- if (nr > cr->mpb->fbuf_alloc)
- {
- cr->mpb->fbuf_alloc = nr;
- srenew(cr->mpb->fbuf, cr->mpb->fbuf_alloc);
- }
- if (cr->nc.bUse)
- {
- /* Use two step summing */
- MPI_Allreduce(r, cr->mpb->fbuf, nr, MPI_FLOAT, MPI_SUM, cr->nc.comm_intra);
- if (cr->nc.rank_intra == 0)
- {
- /* Sum with the buffers reversed */
- MPI_Allreduce(cr->mpb->fbuf, r, nr, MPI_FLOAT, MPI_SUM, cr->nc.comm_inter);
- }
- MPI_Bcast(r, nr, MPI_FLOAT, 0, cr->nc.comm_intra);
- }
- else
- {
- MPI_Allreduce(r, cr->mpb->fbuf, nr, MPI_FLOAT, MPI_SUM, cr->mpi_comm_mygroup);
- for (i = 0; i < nr; i++)
- {
- r[i] = cr->mpb->fbuf[i];
- }
- }
-# endif
#endif
}
void gmx_sumi(int gmx_unused nr, int gmx_unused r[], const t_commrec gmx_unused* cr)
{
-#if !GMX_MPI
- GMX_RELEASE_ASSERT(false, "Invalid call to gmx_sumi");
-#else
-# if MPI_IN_PLACE_EXISTS
+ // Without MPI we have a single rank, so sum is a no-op
+#if GMX_MPI
+ if (cr->sizeOfMyGroupCommunicator == 1)
+ {
+ return;
+ }
+
if (cr->nc.bUse)
{
/* Use two step summing */
{
MPI_Allreduce(MPI_IN_PLACE, r, nr, MPI_INT, MPI_SUM, cr->mpi_comm_mygroup);
}
-# else
- int i;
-
- if (nr > cr->mpb->ibuf_alloc)
- {
- cr->mpb->ibuf_alloc = nr;
- srenew(cr->mpb->ibuf, cr->mpb->ibuf_alloc);
- }
- if (cr->nc.bUse)
- {
- /* Use two step summing */
- MPI_Allreduce(r, cr->mpb->ibuf, nr, MPI_INT, MPI_SUM, cr->nc.comm_intra);
- if (cr->nc.rank_intra == 0)
- {
- /* Sum with the buffers reversed */
- MPI_Allreduce(cr->mpb->ibuf, r, nr, MPI_INT, MPI_SUM, cr->nc.comm_inter);
- }
- MPI_Bcast(r, nr, MPI_INT, 0, cr->nc.comm_intra);
- }
- else
- {
- MPI_Allreduce(r, cr->mpb->ibuf, nr, MPI_INT, MPI_SUM, cr->mpi_comm_mygroup);
- for (i = 0; i < nr; i++)
- {
- r[i] = cr->mpb->ibuf[i];
- }
- }
-# endif
-#endif
-}
-
-void gmx_sumli(int gmx_unused nr, int64_t gmx_unused r[], const t_commrec gmx_unused* cr)
-{
-#if !GMX_MPI
- GMX_RELEASE_ASSERT(false, "Invalid call to gmx_sumli");
-#else
-# if MPI_IN_PLACE_EXISTS
- if (cr->nc.bUse)
- {
- /* Use two step summing */
- if (cr->nc.rank_intra == 0)
- {
- MPI_Reduce(MPI_IN_PLACE, r, nr, MPI_INT64_T, MPI_SUM, 0, cr->nc.comm_intra);
- /* Sum with the buffers reversed */
- MPI_Allreduce(MPI_IN_PLACE, r, nr, MPI_INT64_T, MPI_SUM, cr->nc.comm_inter);
- }
- else
- {
- /* This is here because of the silly MPI specification
- that MPI_IN_PLACE should be put in sendbuf instead of recvbuf */
- MPI_Reduce(r, nullptr, nr, MPI_INT64_T, MPI_SUM, 0, cr->nc.comm_intra);
- }
- MPI_Bcast(r, nr, MPI_INT64_T, 0, cr->nc.comm_intra);
- }
- else
- {
- MPI_Allreduce(MPI_IN_PLACE, r, nr, MPI_INT64_T, MPI_SUM, cr->mpi_comm_mygroup);
- }
-# else
- int i;
-
- if (nr > cr->mpb->libuf_alloc)
- {
- cr->mpb->libuf_alloc = nr;
- srenew(cr->mpb->libuf, cr->mpb->libuf_alloc);
- }
- if (cr->nc.bUse)
- {
- /* Use two step summing */
- MPI_Allreduce(r, cr->mpb->libuf, nr, MPI_INT64_T, MPI_SUM, cr->nc.comm_intra);
- if (cr->nc.rank_intra == 0)
- {
- /* Sum with the buffers reversed */
- MPI_Allreduce(cr->mpb->libuf, r, nr, MPI_INT64_T, MPI_SUM, cr->nc.comm_inter);
- }
- MPI_Bcast(r, nr, MPI_INT64_T, 0, cr->nc.comm_intra);
- }
- else
- {
- MPI_Allreduce(r, cr->mpb->libuf, nr, MPI_INT64_T, MPI_SUM, cr->mpi_comm_mygroup);
- for (i = 0; i < nr; i++)
- {
- r[i] = cr->mpb->libuf[i];
- }
- }
-# endif
#endif
}
biod.pnpi.spb.ru / alexxy / gromacs.git / blobdiff