1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/***************************************************************************/
/* Demonstrates sprng use with one stream per process */
/* A distinct stream is created on each process, then prints a few */
/* random numbers. */
/***************************************************************************/
#include <stdio.h>
#include <mpi.h> /* MPI header file */
/* Uncomment the following line to get the interface with pointer checking */
/*#define CHECK_POINTERS */
#include "sprng.h" /* SPRNG header file */
#define SEED 985456376
main(int argc, char *argv[])
{
int streamnum, nstreams, *stream;
double rn;
int i, myid, nprocs;
int gtype; /*--- */
/*************************** MPI calls ***********************************/
MPI_Init(&argc, &argv); /* Initialize MPI */
MPI_Comm_rank(MPI_COMM_WORLD, &myid); /* find process id */
MPI_Comm_size(MPI_COMM_WORLD, &nprocs); /* find number of processes */
/************************** Initialization *******************************/
streamnum = myid;
nstreams = nprocs; /* one stream per processor */
/*--- node 0 is reading in a generator type */
if(myid == 0)
{
#include "gen_types_menu.h"
printf("Type in a generator type (integers: 0,1,2,3,4,5): ");
scanf("%d", >ype);
}
MPI_Bcast(>ype,1,MPI_INT,0,MPI_COMM_WORLD );
stream = init_sprng(gtype,streamnum,nstreams,SEED,SPRNG_DEFAULT); /* initialize stream */
printf("\n\nProcess %d, print information about stream:\n", myid);
print_sprng(stream);
/*********************** print random numbers ****************************/
for (i=0;i<3;i++)
{
rn = sprng(stream); /* generate double precision random number */
printf("Process %d, random number %d: %.14f\n", myid, i+1, rn);
}
/*************************** free memory *********************************/
free_sprng(stream); /* free memory used to store stream state */
MPI_Finalize(); /* Terminate MPI */
}
|
