group, mpjdevComm
Modifier and Type | Method and Description |
---|---|
void |
Allgather(java.lang.Object sendbuf,
int sendoffset,
int sendcount,
Datatype sendtype,
java.lang.Object recvbuf,
int recvoffset,
int recvcount,
Datatype recvtype)
Similar to Gather, but all processes receive the result.
|
void |
Allgatherv(java.lang.Object sendbuf,
int sendoffset,
int sendcount,
Datatype sendtype,
java.lang.Object recvbuf,
int recvoffset,
int[] recvcount,
int[] displs,
Datatype recvtype)
Similar to Gatherv, but all processes receive the result.
|
void |
Allreduce(java.lang.Object sendbuf,
int sendoffset,
java.lang.Object recvbuf,
int recvoffset,
int count,
Datatype datatype,
Op op)
Same as reduce except that the result appears in receive buffer of
all process in the group.
|
void |
Alltoall(java.lang.Object sendbuf,
int sendoffset,
int sendcount,
Datatype sendtype,
java.lang.Object recvbuf,
int recvoffset,
int recvcount,
Datatype recvtype)
Extension of Allgather to the case where each process sends
distinct data to each of the receivers.
|
void |
Alltoallv(java.lang.Object sendbuf,
int sendoffset,
int[] sendcount,
int[] sdispls,
Datatype sendtype,
java.lang.Object recvbuf,
int recvoffset,
int[] recvcount,
int[] rdispls,
Datatype recvtype)
Adds flexibility to Alltoall: location of data for send is
specified by sdispls and location to place data on receive side is
specified by rdispls.
|
void |
Barrier()
Broadcast a message from the process with rank root to all
processes of the group.
|
void |
Bcast(java.lang.Object buf,
int offset,
int count,
Datatype type,
int root)
Broadcast a message from the process with rank root to all
processes of the group.
|
java.lang.Object |
clone()
Clone the communicator This method will be called only by intracommunicator
....
|
static int |
Compare(Comm comm1,
Comm comm2)
Compare two communicators.
|
Cartcomm |
Create_cart(int[] dims,
boolean[] periods,
boolean reorder)
Create a Cartesian topology communicator whose group is a subset of the
group of this communicator.
|
Graphcomm |
Create_graph(int[] index,
int[] edges,
boolean reorder)
Create a graph topology communicator whose group is a subset of the group
of this communicator.
|
Intracomm |
Create(Group group)
Create a new communicator.
|
void |
Gather(java.lang.Object sendbuf,
int sendoffset,
int sendcount,
Datatype sendtype,
java.lang.Object recvbuf,
int recvoffset,
int recvcount,
Datatype recvtype,
int root)
Each process sends the contents of its send buffer to the root process.
|
void |
Gatherv(java.lang.Object sendbuf,
int sendoffset,
int sendcount,
Datatype sendtype,
java.lang.Object recvbuf,
int recvoffset,
int[] recvcount,
int[] displs,
Datatype recvtype,
int root)
Extends functionality of Gather by allowing varying counts of data
from each process.
|
void |
Reduce_scatter(java.lang.Object sendbuf,
int sendoffset,
java.lang.Object recvbuf,
int recvoffset,
int[] recvcounts,
Datatype datatype,
Op op)
Combine elements in input buffer of each process using the reduce
operation, and scatter the combined values over the output buffers of the
processes.
|
void |
Reduce(java.lang.Object sendbuf,
int sendoffset,
java.lang.Object recvbuf,
int recvoffset,
int count,
Datatype datatype,
Op op,
int root)
Combine elements in input buffer of each process using the reduce
operation, and return the combined value in the output buffer of the root
process.
|
void |
Scan(java.lang.Object sendbuf,
int sendoffset,
java.lang.Object recvbuf,
int recvoffset,
int count,
Datatype datatype,
Op op)
Perform a prefix reduction on data distributed across the group.
|
void |
Scatter(java.lang.Object sendbuf,
int sendoffset,
int sendcount,
Datatype sendtype,
java.lang.Object recvbuf,
int recvoffset,
int recvcount,
Datatype recvtype,
int root)
Inverse of the operation Gather.
|
void |
Scatterv(java.lang.Object sendbuf,
int sendoffset,
int[] sendcount,
int[] displs,
Datatype sendtype,
java.lang.Object recvbuf,
int recvoffset,
int recvcount,
Datatype recvtype,
int root)
Inverse of the operation Gatherv.
|
Intracomm |
Split(int color,
int key)
Partition the group associated with this communicator and create a new
communicator within each subgroup.
|
Abort, Attr_delete, Attr_get, Bsend_init, Bsend, bsend, Create_intercomm, Free, Group, Ibsend, ibsend, Iprobe, Irecv, irecv, Irsend, irsend, Isend, isend, Issend, issend, Pack_size, Pack, Probe, Rank, Recv_init, Recv, recv, Rsend_init, Rsend, rsend, Send_init, Send, send, Sendrecv_replace, sendrecv, Sendrecv, Size, Ssend_init, Ssend, ssend, Test_inter, Topo_test, Unpack
public static int Compare(Comm comm1, Comm comm2) throws MPIException
comm1 | first communicator |
comm2 | second communicator |
returns: | result |
Java binding of the MPI operation MPI_COMM_COMPARE.
MPI.IDENT(0) results if the comm1 and comm2 are references to the same object (ie, if comm1 == comm2). MPI.CONGRUENT(3) results if the underlying groups are identical but the communicators differ by context. MPI.SIMILAR(1) results if the underlying groups are similar but the communicators differ by context. MPI.UNEQUAL(2) results otherwise.
MPIException
public Intracomm Split(int color, int key) throws MPIException
color | control of subset assignment |
key | control of rank assignment |
returns: | new communicator |
Java binding of the MPI operation MPI_COMM_SPLIT.
MPIException
public java.lang.Object clone() throws MPIException
clone
in class Comm
MPIException
public Intracomm Create(Group group) throws MPIException
group | group which is a subset of the group of this communicator |
returns: | new communicator |
Java binding of the MPI operation MPI_COMM_CREATE.
MPIException
public void Barrier() throws MPIException
buf | buffer array |
offset | initial offset in buffer |
count | number of items in buffer |
datatype | datatype of each item in buffer |
buf | buffer array |
offset | initial offset in buffer |
count | number of items in buffer |
datatype | datatype of each item in buffer |
root | rank of broadcast root |
Java binding of the MPI operation MPI_BCST.
MPIException
public void Gather(java.lang.Object sendbuf, int sendoffset, int sendcount, Datatype sendtype, java.lang.Object recvbuf, int recvoffset, int recvcount, Datatype recvtype, int root) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
sendcount | number of items to send |
sendtype | datatype of each item in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcount | number of items to receive |
recvtype | datatype of each item in receive buffer |
root | rank of receiving process |
Java binding of the MPI operation MPI_GATHER.
MPIException
public void Gatherv(java.lang.Object sendbuf, int sendoffset, int sendcount, Datatype sendtype, java.lang.Object recvbuf, int recvoffset, int[] recvcount, int[] displs, Datatype recvtype, int root) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
sendcount | number of items to send |
sendtype | datatype of each item in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcounts | number of elements received from each process |
displs | displacements at which to place incoming data |
recvtype | datatype of each item in receive buffer |
root | rank of receiving process |
Java binding of the MPI operation MPI_GATHERV.
The sizes of arrays recvcounts and displs should be the size of the group. Entry i of displs specifies the displacement relative to element recvoffset of recvbuf at which to place incoming data.
MPIException
public void Scatter(java.lang.Object sendbuf, int sendoffset, int sendcount, Datatype sendtype, java.lang.Object recvbuf, int recvoffset, int recvcount, Datatype recvtype, int root) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
sendcount | number of items to send |
sendtype | datatype of each item in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcount | number of items to receive |
recvtype | datatype of each item in receive buffer |
root | rank of sending process |
Java binding of the MPI operation MPI_SCATTER.
MPIException
public void Scatterv(java.lang.Object sendbuf, int sendoffset, int[] sendcount, int[] displs, Datatype sendtype, java.lang.Object recvbuf, int recvoffset, int recvcount, Datatype recvtype, int root) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
sendcounts | number of items sent to each process |
displs | displacements from which to take outgoing data |
sendtype | datatype of each item in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcount | number of items to receive |
recvtype | datatype of each item in receive buffer |
root | rank of sending process |
Java binding of the MPI operation MPI_SCATTERV.
MPIException
public void Allgather(java.lang.Object sendbuf, int sendoffset, int sendcount, Datatype sendtype, java.lang.Object recvbuf, int recvoffset, int recvcount, Datatype recvtype) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
sendcount | number of items to send |
sendtype | datatype of each item in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcount | number of items to receive |
recvtype | datatype of each item in receive buffer |
Java binding of the MPI operation MPI_ALLGATHER.
MPIException
public void Allgatherv(java.lang.Object sendbuf, int sendoffset, int sendcount, Datatype sendtype, java.lang.Object recvbuf, int recvoffset, int[] recvcount, int[] displs, Datatype recvtype) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
sendcount | number of items to send |
sendtype | datatype of each item in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcounts | number of elements received from each process |
displs | displacements at which to place incoming data |
recvtype | datatype of each item in receive buffer |
Java binding of the MPI operation MPI_ALLGATHERV.
MPIException
public void Alltoall(java.lang.Object sendbuf, int sendoffset, int sendcount, Datatype sendtype, java.lang.Object recvbuf, int recvoffset, int recvcount, Datatype recvtype) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
sendcount | number of items sent to each process |
sendtype | datatype send buffer items |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcount | number of items received from any process |
recvtype | datatype of receive buffer items |
Java binding of the MPI operation MPI_ALLTOALL.
MPIException
public void Alltoallv(java.lang.Object sendbuf, int sendoffset, int[] sendcount, int[] sdispls, Datatype sendtype, java.lang.Object recvbuf, int recvoffset, int[] recvcount, int[] rdispls, Datatype recvtype) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
sendcounts | number of items sent to each process |
sdispls | displacements from which to take outgoing data |
sendtype | datatype send buffer items |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcounts | number of elements received from each process |
rdispls | displacements at which to place incoming data |
recvtype | datatype of each item in receive buffer |
Java binding of the MPI operation MPI_ALLTOALLV.
MPIException
public void Reduce(java.lang.Object sendbuf, int sendoffset, java.lang.Object recvbuf, int recvoffset, int count, Datatype datatype, Op op, int root) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
count | number of items in send buffer |
datatype | data type of each item in send buffer |
op | reduce operation |
root | rank of root process |
Java binding of the MPI operation MPI_REDUCE.
The predefined operations are available in Java as MPI.MAX, MPI.MIN, MPI.SUM, MPI.PROD, MPI.LAND, MPI.BAND, MPI.LOR, MPI.BOR, MPI.LXOR, MPI.BXOR, MPI.MINLOC and MPI.MAXLOC.
MPIException
public void Allreduce(java.lang.Object sendbuf, int sendoffset, java.lang.Object recvbuf, int recvoffset, int count, Datatype datatype, Op op) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
count | number of items in send buffer |
datatype | data type of each item in send buffer |
op | reduce operation |
Java binding of the MPI operation MPI_ALLREDUCE.
MPIException
public void Reduce_scatter(java.lang.Object sendbuf, int sendoffset, java.lang.Object recvbuf, int recvoffset, int[] recvcounts, Datatype datatype, Op op) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
recvcounts | numbers of result elements distributed to each process |
datatype | data type of each item in send buffer |
op | reduce operation |
Java binding of the MPI operation MPI_REDUCE_SCATTER.
MPIException
public void Scan(java.lang.Object sendbuf, int sendoffset, java.lang.Object recvbuf, int recvoffset, int count, Datatype datatype, Op op) throws MPIException
sendbuf | send buffer array |
sendoffset | initial offset in send buffer |
recvbuf | receive buffer array |
recvoffset | initial offset in receive buffer |
count | number of items in input buffer |
datatype | data type of each item in input buffer |
op | reduce operation |
Java binding of the MPI operation MPI_SCAN.
MPIException
public Cartcomm Create_cart(int[] dims, boolean[] periods, boolean reorder) throws MPIException
dims | the number of processes in each dimension |
periods | true if grid is periodic, false if not, in each dimension |
reorder | true if ranking may be reordered, false if not |
returns: | new Cartesian topology communicator |
Java binding of the MPI operation MPI_CART_CREATE.
The number of dimensions of the Cartesian grid is taken to be the size of the dims argument. The array periods must be the same size.
MPIException
public Graphcomm Create_graph(int[] index, int[] edges, boolean reorder)
index | node degrees |
edges | graph edges |
reorder | true if ranking may be reordered, false if not |
returns: | new graph topology communicator |
Java binding of the MPI operation MPI_GRAPH_CREATE.
The number of nodes in the graph, nnodes, is taken to be size of the index argument. The size of array edges must be index [nnodes} - 1].