本文整理汇总了C++中mpi::communicator::isend方法的典型用法代码示例。如果您正苦于以下问题：C++ communicator::isend方法的具体用法？C++ communicator::isend怎么用？C++ communicator::isend使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类mpi::communicator的用法示例。
在下文中一共展示了communicator::isend方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: mandel_mpi
void mandel_mpi (mpi::communicator world,
int2D* matrix, /* to fill */
int nr, /* row size */
int nc, /* column size */
real base_x, /* lower left corner */
real base_y, /* lower left corner */
real ext_x, /* extent */
real ext_y) /* extent */
{
int r, c; /* row and column indices */
real dx, dy; /* per-step deltas */
#if GRAPHICS
int gfxCount = 0; /* number of times graphics called */
#endif
int row_count = 0;
int i;
mpi::status status;
int source;
const int WORK_REQUEST_TAG = 0;
const int WORK_RESPONSE_TAG = 1;
const int NO_MORE_WORK = -1;
int processed_rows = 0;
dx = ext_x / (nr - 1);
dy = ext_y / (nc - 1);
if (world.size () > 1) {
if (world.rank () == 0) {
// control process
// send out work
while (row_count < nr) {
status = world.recv (mpi::any_source, WORK_REQUEST_TAG);
source = status.source ();
// send next row
world.isend (source, WORK_RESPONSE_TAG, row_count);
row_count++;
}
// send out no more work
for (i = 1; i < world.size (); i++) {
status = world.recv (mpi::any_source, WORK_REQUEST_TAG);
source = status.source ();
world.isend (source, WORK_RESPONSE_TAG, NO_MORE_WORK);
}
// receive results
for (r = 0; r < nr; r++) {
world.recv (mpi::any_source, r + 1, matrix[r], nc);
}
}
else {
// work process
while (true) {
// request next row
world.send (0, WORK_REQUEST_TAG);
world.recv (0, WORK_RESPONSE_TAG, r);
if (r != NO_MORE_WORK) {
for (c = 0; c < nc; c++) {
matrix[r][c] = mandel_calc_mpi (base_x + (r * dx), base_y + (c * dy));
}
processed_rows++;
// send results
world.isend (0, r + 1, matrix[r], nc);
}
else {
break;
}
}
#if defined(TEST_OUTPUT) || defined(TEST_TIME)
printf ("processed rows: %d\n", processed_rows);
#endif
}
// broadcast matrix
for (r = 0; r < nr; r++) {
broadcast (world, matrix[r], nc, 0);
}
}
else {
for (r = 0; r < nr; r++) {
for (c = 0; c < nc; c++) {
matrix[r][c] = mandel_calc_mpi (base_x + (r * dx), base_y + (c * dy));
}
}
}
#if GRAPHICS
gfx_mandel(gfxCount++, matrix, nr, nc);
#endif
/* return */
}