//---------------------------------------------------------------------------//
int
recv(Node &node, int src, int tag, MPI_Comm comm)
{
int intArray[2];
MPI_Status status;
int mpi_error = MPI_Recv(intArray, 2, MPI_INT, src, tag, comm, &status);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
int schema_len = intArray[0];
int data_len = intArray[1];
char schema[schema_len + 1];
char data[data_len + 1];
mpi_error = MPI_Recv(schema, schema_len, MPI_CHAR, src, tag, comm, &status);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
mpi_error = MPI_Recv(data, data_len, MPI_CHAR, src, tag, comm, &status);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
Generator node_gen(schema, data);
/// gen copy
node_gen.walk(node);
return mpi_error;
}
//---------------------------------------------------------------------------//
int
send(Node &node, int dest, int tag, MPI_Comm comm)
{
Schema schema_c;
node.schema().compact_to(schema_c);
std::string schema = schema_c.to_json();
int schema_len = schema.length() + 1;
std::vector<uint8> data;
node.serialize(data);
int data_len = data.size();
int intArray[2] = { schema_len, data_len };
int mpi_error = MPI_Send(intArray, 2, MPI_INT, dest, tag, comm);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
mpi_error = MPI_Send(const_cast <char*> (schema.c_str()), schema_len, MPI_CHAR, dest, tag, comm);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
mpi_error = MPI_Send((char*)&data[0], data_len, MPI_CHAR, dest, tag, comm);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
return mpi_error;
}
//---------------------------------------------------------------------------//
int
recv(Node &node, int src, int tag, MPI_Comm comm)
{
int rcv_counts[2];
MPI_Status status;
int mpi_error = MPI_Recv(rcv_counts, 2, MPI_INT, src, tag, comm, &status);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
int schema_len = rcv_counts[0];
int data_len = rcv_counts[1];
Node recv_buffers;
recv_buffers["schema"].set(DataType::c_char(schema_len+1));
recv_buffers["data"].set(DataType::c_char(data_len+1));
char *schema_ptr = recv_buffers["schema"].value();
char *data_ptr = recv_buffers["data"].value();
mpi_error = MPI_Recv(schema_ptr, schema_len, MPI_CHAR, src, tag, comm, &status);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
mpi_error = MPI_Recv(data_ptr, data_len, MPI_CHAR, src, tag, comm, &status);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
Generator node_gen(schema_ptr, "conduit_json", data_ptr);
/// gen copy
node_gen.walk(node);
return mpi_error;
}
//---------------------------------------------------------------------------//
int
all_gather(Node &send_node,
Node &recv_node,
MPI_Comm mpi_comm)
{
Node n_snd_compact;
send_node.compact_to(n_snd_compact);
int data_len = n_snd_compact.total_bytes();
int m_size = mpi::size(mpi_comm);
recv_node.list_of(n_snd_compact.schema(),
m_size);
int mpi_error = MPI_Allgather( n_snd_compact.data_ptr(), // local data
data_len, // local data len
MPI_CHAR, // send chars
recv_node.data_ptr(), // rcv buffer
data_len, // data len
MPI_CHAR, // rcv chars
mpi_comm); // mpi com
CONDUIT_CHECK_MPI_ERROR(mpi_error);
return mpi_error;
}
//---------------------------------------------------------------------------//
int
wait_all_recv(int count,
ConduitMPIRequest requests[],
MPI_Status statuses[])
{
MPI_Request *justrequests = new MPI_Request[count];
for (int i = 0; i < count; ++i)
{
justrequests[i] = requests[i]._request;
}
int mpi_error = MPI_Waitall(count, justrequests, statuses);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
for (int i = 0; i < count; ++i)
{
requests[i]._recvData->update(*(requests[i]._externalData));
requests[i]._request = justrequests[i];
delete requests[i]._externalData;
requests[i]._externalData = 0;
}
delete [] justrequests;
return mpi_error;
}
//---------------------------------------------------------------------------//
int
wait_send(ConduitMPIRequest* request,
MPI_Status *status)
{
int mpi_error = MPI_Wait(&(request->_request), status);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
delete request->_externalData;
request->_externalData = 0;
return mpi_error;
}
//---------------------------------------------------------------------------//
int
isend(Node &node,
int dest,
int tag,
MPI_Comm mpi_comm,
ConduitMPIRequest* request)
{
request->_externalData = new Node();
node.compact_to(*(request->_externalData));
int mpi_error = MPI_Isend((char*)request->_externalData->data_ptr(),
request->_externalData->total_bytes(),
MPI_CHAR,
dest,
tag,
mpi_comm,
&(request->_request));
CONDUIT_CHECK_MPI_ERROR(mpi_error);
return mpi_error;
}
//---------------------------------------------------------------------------//
int
reduce(Node &send_node,
Node& recv_node,
MPI_Datatype mpi_datatype,
MPI_Op mpi_op,
int root,
MPI_Comm mpi_comm)
{
int rank;
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
Schema schema_c;
send_node.schema().compact_to(schema_c);
std::string schema = schema_c.to_json();
std::vector<uint8> data;
send_node.serialize(data);
int data_len = data.size();
int datasize = 0;
MPI_Type_size(mpi_datatype, &datasize);
char recvdata[data_len+1];
int mpi_error = MPI_Reduce(&data[0],
recvdata,
(data_len / datasize) + 1,
mpi_datatype, mpi_op, root, mpi_comm);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
if (rank == root)
{
Generator node_gen(schema, recvdata);
node_gen.walk(recv_node);
}
return mpi_error;
}
//--------------------------------------------------------------------------//
int
all_reduce(Node &send_node,
Node &recv_node,
MPI_Datatype mpi_datatype,
MPI_Op mpi_op,
MPI_Comm mpi_comm)
{
Schema schema_c;
send_node.schema().compact_to(schema_c);
std::string schema = schema_c.to_json();
std::vector<uint8> data;
send_node.serialize(data);
int data_len = data.size();
int data_size = 0;
MPI_Type_size(mpi_datatype, &data_size);
Node recv_buffer;
recv_buffer.set(DataType::c_char(data_len+1));
char *recv_ptr = recv_buffer.value();
int mpi_error = MPI_Allreduce(&data[0],
recv_ptr,
(data_len / data_size) + 1,
mpi_datatype,
mpi_op,
mpi_comm);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
Generator node_gen(schema, "conduit_json", recv_ptr);
node_gen.walk(recv_node);
return mpi_error;
}
//--------------------------------------------------------------------------//
int
all_reduce(Node &send_node,
Node &recv_node,
MPI_Datatype mpi_datatype,
MPI_Op mpi_op,
MPI_Comm mpi_comm)
{
Schema schema_c;
send_node.schema().compact_to(schema_c);
std::string schema = schema_c.to_json();
std::vector<uint8> data;
send_node.serialize(data);
int data_len = data.size();
int datasize = 0;
MPI_Type_size(mpi_datatype, &datasize);
char recvdata[data_len+1];
int mpi_error = MPI_Allreduce(&data[0],
recvdata,
(data_len / datasize) + 1,
mpi_datatype,
mpi_op,
mpi_comm);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
Generator node_gen(schema, recvdata);
node_gen.walk(recv_node);
return mpi_error;
}
//---------------------------------------------------------------------------//
int
all_gatherv(Node &send_node,
Node &recv_node,
MPI_Comm mpi_comm)
{
Node n_snd_compact;
send_node.compact_to(n_snd_compact);
int m_size = mpi::size(mpi_comm);
std::string schema_str = n_snd_compact.schema().to_json();
int schema_len = schema_str.length() + 1;
int data_len = n_snd_compact.total_bytes();
// to do the conduit gatherv, first need a gather to get the
// schema and data buffer sizes
int snd_sizes[] = {schema_len, data_len};
Node n_rcv_sizes;
Schema s;
s["schema_len"].set(DataType::c_int());
s["data_len"].set(DataType::c_int());
n_rcv_sizes.list_of(s,m_size);
int mpi_error = MPI_Allgather( snd_sizes, // local data
2, // two ints per rank
MPI_INT, // send ints
n_rcv_sizes.data_ptr(), // rcv buffer
2, // two ints per rank
MPI_INT, // rcv ints
mpi_comm); // mpi com
CONDUIT_CHECK_MPI_ERROR(mpi_error);
Node n_rcv_tmp;
int *schema_rcv_counts = NULL;
int *schema_rcv_displs = NULL;
char *schema_rcv_buff = NULL;
int *data_rcv_counts = NULL;
int *data_rcv_displs = NULL;
char *data_rcv_buff = NULL;
// alloc data for the mpi gather counts and displ arrays
n_rcv_tmp["schemas/counts"].set(DataType::c_int(m_size));
n_rcv_tmp["schemas/displs"].set(DataType::c_int(m_size));
n_rcv_tmp["data/counts"].set(DataType::c_int(m_size));
n_rcv_tmp["data/displs"].set(DataType::c_int(m_size));
// get pointers to counts and displs
schema_rcv_counts = n_rcv_tmp["schemas/counts"].value();
schema_rcv_displs = n_rcv_tmp["schemas/displs"].value();
data_rcv_counts = n_rcv_tmp["data/counts"].value();
data_rcv_displs = n_rcv_tmp["data/displs"].value();
int schema_curr_displ = 0;
int data_curr_displ = 0;
int i=0;
NodeIterator itr = n_rcv_sizes.children();
while(itr.has_next())
{
Node &curr = itr.next();
int schema_curr_count = curr["schema_len"].value();
int data_curr_count = curr["data_len"].value();
schema_rcv_counts[i] = schema_curr_count;
schema_rcv_displs[i] = schema_curr_displ;
schema_curr_displ += schema_curr_count;
data_rcv_counts[i] = data_curr_count;
data_rcv_displs[i] = data_curr_displ;
data_curr_displ += data_curr_count;
i++;
}
n_rcv_tmp["schemas/data"].set(DataType::c_char(schema_curr_displ));
schema_rcv_buff = n_rcv_tmp["schemas/data"].value();
mpi_error = MPI_Allgatherv( const_cast <char*>(schema_str.c_str()),
schema_len,
MPI_CHAR,
schema_rcv_buff,
schema_rcv_counts,
schema_rcv_displs,
MPI_CHAR,
mpi_comm);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
// build all schemas from JSON, compact them.
Schema rcv_schema;
//TODO: should we make it easer to create a compact schema?
Schema s_tmp;
for(int i=0; i < m_size; i++)
{
Schema &s = s_tmp.append();
s.set(&schema_rcv_buff[schema_rcv_displs[i]]);
}
s_tmp.compact_to(rcv_schema);
// allocate data to hold the gather result
recv_node.set(rcv_schema);
data_rcv_buff = (char*)recv_node.data_ptr();
mpi_error = MPI_Allgatherv( n_snd_compact.data_ptr(),
data_len,
MPI_CHAR,
data_rcv_buff,
data_rcv_counts,
data_rcv_displs,
MPI_CHAR,
mpi_comm);
CONDUIT_CHECK_MPI_ERROR(mpi_error);
return mpi_error;
}