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MPI 3: minor edits #13483

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Mar 3, 2022
Merged

MPI 3: minor edits #13483

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2 changes: 1 addition & 1 deletion examples/step-76/step-76.cc
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Expand Up @@ -510,7 +510,7 @@ namespace Euler_DG
EulerOperator<dim, degree, n_points_1d>::EulerOperator(TimerOutput &timer)
: timer(timer)
{
#if DEAL_II_MPI_VERSION_GTE(3, 0)
#ifdef DEAL_II_WITH_MPI
if (group_size == 1)
{
this->subcommunicator = MPI_COMM_SELF;
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3 changes: 1 addition & 2 deletions source/base/mpi.cc
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Expand Up @@ -285,7 +285,6 @@ namespace Utilities

# ifdef DEBUG
MPI_Count size64;
// this function is only available starting with MPI 3.0:
ierr = MPI_Type_size_x(result, &size64);
AssertThrowMPI(ierr);

Expand Down Expand Up @@ -367,7 +366,7 @@ namespace Utilities
// So we need to run a different algorithm, specifically one that
// requires more memory -- MPI_Reduce_scatter_block will require memory
// proportional to the number of processes involved; that function is
// also only available for MPI 2.2 or later:
// available for MPI 2.2 or later:
static CollectiveMutex mutex;
CollectiveMutex::ScopedLock lock(mutex, mpi_comm);

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