Commit 1960b4d1 authored by Peter W. Draper's avatar Peter W. Draper
Browse files

Add simple function to dump the positions and ranks of the top-level cells

Useful to visualize the partition
parent 9c319e94
......@@ -331,4 +331,48 @@ void dumpMETISGraph(const char *prefix, idx_t nvertices, idx_t nvertexweights,
#endif /* HAVE_METIS */
#ifdef HAVE_MPI
* @brief Dump the positions and MPI ranks of the given top-level cells
* to a simple text file.
* Can be used to visualise the partitioning of an MPI run. Note should
* be used immediately after repartitioning when the top-level cells
* have been assigned their nodes. Each time this is called a new file
* with the given prefix, a unique integer and type of .dat is created.
* @param prefix base output filename
* @param cells_top the top-level cells.
* @param nr_cells the number of cells.
void dumpCellRanks(const char *prefix, struct cell *cells_top,
int nr_cells) {
FILE *file = NULL;
/* Name of output file. */
static int nseq = 0;
char fname[200];
sprintf(fname, "%s_%03d.dat", prefix, nseq);
file = fopen(fname, "w");
/* Header. */
fprintf(file, "# %6s %6s %6s %6s %6s %6s %6s\n",
"x", "y", "z", "xw", "yw", "zw", "rank");
/* Output */
for (int i = 0; i < nr_cells; i++) {
struct cell *c = &cells_top[i];
fprintf(file, " %6.3f %6.3f %6.3f %6.3f %6.3f %6.3f %6d\n",
c->loc[0], c->loc[1], c->loc[2], c->width[0],
c->width[1], c->width[2], c->nodeID);
#endif /* HAVE_MPI */
......@@ -37,6 +37,11 @@ int checkSpacehmax(struct space *s);
#include "metis.h"
void dumpMETISGraph(const char *prefix, idx_t nvtxs, idx_t ncon, idx_t *xadj,
idx_t *adjncy, idx_t *vwgt, idx_t *vsize, idx_t *adjwgt);
#ifdef HAVE_MPI
void dumpCellRanks(const char *prefix, struct cell *cells_top,
int nr_cells);
#endif /* SWIFT_DEBUG_H */
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