3#ifndef DUNE_COLLECTIVECOMMUNICATION_HH
4#define DUNE_COLLECTIVECOMMUNICATION_HH
77 template<
typename Communicator>
119 int sum (T* inout,
int len)
const
139 int prod (T* inout,
int len)
const
159 int min (T* inout,
int len)
const
179 int max (T* inout,
int len)
const
214 int gather (T* in, T* out,
int len,
int root)
const
216 for (
int i=0; i<len; i++)
241 int gatherv (T* in,
int sendlen, T* out,
int* recvlen,
int* displ,
int root)
const
243 for (
int i=*displ; i<sendlen; i++)
262 int scatter (T* send, T* recv,
int len,
int root)
const
264 for (
int i=0; i<len; i++)
288 int scatterv (T* send,
int* sendlen,
int* displ, T* recv,
int recvlen,
int root)
const
290 for (
int i=*displ; i<*sendlen; i++)
311 for(T* end=sbuf+count; sbuf < end; ++sbuf, ++rbuf)
333 int allgatherv (T* in,
int sendlen, T* out,
int* recvlen,
int* displ)
const
335 for (
int i=*displ; i<sendlen; i++)
352 template<
typename BinaryFunction,
typename Type>
371 template<
typename BinaryFunction,
typename Type>
374 std::copy(in, in+len, out);
A few common exception classes.
Various helper classes derived from from std::binary_function for stl-style functional programming.
Dune namespace.
Definition alignment.hh:11
Definition collectivecommunication.hh:42
Collective communication interface and sequential default implementation.
Definition collectivecommunication.hh:79
int barrier() const
Wait until all processes have arrived at this point in the program.
Definition collectivecommunication.hh:187
T min(T &in) const
Compute the minimum of the argument over all processes and return the result in every process....
Definition collectivecommunication.hh:148
void allreduce(Type *in, Type *out, int len) const
Compute something over all processes for each component of an array and return the result in every pr...
Definition collectivecommunication.hh:372
T max(T &in) const
Compute the maximum of the argument over all processes and return the result in every process....
Definition collectivecommunication.hh:168
int scatterv(T *send, int *sendlen, int *displ, T *recv, int recvlen, int root) const
Scatter arrays of variable length from a root to all other tasks.
Definition collectivecommunication.hh:288
T prod(T &in) const
Compute the product of the argument over all processes and return the result in every process....
Definition collectivecommunication.hh:128
CollectiveCommunication()
Construct default object.
Definition collectivecommunication.hh:82
int broadcast(T *inout, int len, int root) const
Distribute an array from the process with rank root to all other processes.
Definition collectivecommunication.hh:196
int max(T *inout, int len) const
Compute the maximum over all processes for each component of an array and return the result in every ...
Definition collectivecommunication.hh:179
int scatter(T *send, T *recv, int len, int root) const
Scatter array from a root to all other task.
Definition collectivecommunication.hh:262
int rank() const
Return rank, is between 0 and size()-1.
Definition collectivecommunication.hh:93
int gather(T *in, T *out, int len, int root) const
Gather arrays on root task.
Definition collectivecommunication.hh:214
int allgather(T *sbuf, int count, T *rbuf) const
Gathers data from all tasks and distribute it to all.
Definition collectivecommunication.hh:309
int sum(T *inout, int len) const
Compute the sum over all processes for each component of an array and return the result in every proc...
Definition collectivecommunication.hh:119
int allreduce(Type *inout, int len) const
Compute something over all processes for each component of an array and return the result in every pr...
Definition collectivecommunication.hh:353
int allgatherv(T *in, int sendlen, T *out, int *recvlen, int *displ) const
Gathers data of variable length from all tasks and distribute it to all.
Definition collectivecommunication.hh:333
int gatherv(T *in, int sendlen, T *out, int *recvlen, int *displ, int root) const
Gather arrays of variable size on root task.
Definition collectivecommunication.hh:241
int prod(T *inout, int len) const
Compute the product over all processes for each component of an array and return the result in every ...
Definition collectivecommunication.hh:139
int size() const
Number of processes in set, is greater than 0.
Definition collectivecommunication.hh:99
T sum(T &in) const
Compute the sum of the argument over all processes and return the result in every process....
Definition collectivecommunication.hh:108
CollectiveCommunication(const Communicator &)
Constructor with a given communicator.
Definition collectivecommunication.hh:89
int min(T *inout, int len) const
Compute the minimum over all processes for each component of an array and return the result in every ...
Definition collectivecommunication.hh:159