Changeset 97c25dd for src/comm/mpi/comm_info.cpp

Timestamp:

Dec 8, 2011, 12:53:58 PM (14 years ago)

Author:

Julian Iseringhausen <isering@…>

Children:

76e019

Parents:

1610dc

Message:

Work on a red-black communication routine to half the communication amount.

git-svn-id: ​https://svn.version.fz-juelich.de/scafacos/trunk@1247 5161e1c8-67bf-11de-9fd5-51895aff932f

File:

• src/comm/mpi/comm_info.cpp (modified) (3 diffs)

src/comm/mpi/comm_info.cpp

@@ -20 +20 @@
 
 #include "base/index.hpp"
+#include "base/timer.hpp"
 #include "comm/mpi/comm_info.hpp"
 #include "grid/grid.hpp"
@@ -129 +130 @@
 MPI_Datatype VMG::MPI::CommInfo::GetDatatypeSubarray(const Index& begin, const Index& end, const Index& size_total)
 {
-  std::map<Key, MPI_Datatype>::iterator iter = datatypes.find(Key(begin, end, size_total));
-
-  if (iter != datatypes.end())
+  const Key k = Key(begin, end, size_total);
+
+  std::map<Key, MPI_Datatype>::const_iterator iter = datatypes.lower_bound(k);
+
+  if (iter != datatypes.end() && !(datatypes.key_comp()(k, iter->first)))
     return iter->second;
 
@@ -143 +146 @@
   MPI_Type_commit(&dt);
 
+  datatypes.insert(std::make_pair(k, dt));
+
   return dt;
 }