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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <sys/times.h>
#include "mpi.h"
#include "openmx_common.h"
#define asize1 819200 // 819200
static void dtime(double *t);
int main(int argc, char *argv[])
{
int numprocs,myid,ID,count,tag,i,j,k;
double **SndA;
double **SndB;
double **RcvA;
double **RcvB;
double TStime,TEtime;
double sum;
MPI_Status stat;
MPI_Request request;
MPI_Init(&argc,&argv);
MPI_Comm_size(mpi_comm_level1,&numprocs);
MPI_Comm_rank(mpi_comm_level1,&myid);
SndA = (double**)malloc(sizeof(double*)*numprocs);
for (i=0; i<numprocs; i++){
SndA[i] = (double*)malloc(sizeof(double)*asize1);
}
RcvA = (double**)malloc(sizeof(double*)*numprocs);
for (i=0; i<numprocs; i++){
RcvA[i] = (double*)malloc(sizeof(double)*asize1);
}
RcvB = (double**)malloc(sizeof(double*)*numprocs);
for (i=0; i<numprocs; i++){
RcvB[i] = (double*)malloc(sizeof(double)*asize1);
}
printf("numprocs=%2d myid=%2d\n",numprocs,myid);
for (i=0; i<asize1; i++){
SndA[myid][i] = cos((double)myid*(double)i);
}
tag = 999;
MPI_Barrier(mpi_comm_level1);
dtime(&TStime);
/*
for (ID=0; ID<numprocs; ID++){
if (ID!=myid){
MPI_Isend(&SndA[myid][0], asize1, MPI_DOUBLE, ID, tag, mpi_comm_level1, &request);
MPI_Recv( &RcvA[ID][0], asize1, MPI_DOUBLE, ID, tag, mpi_comm_level1, &stat);
MPI_Wait(&request,&stat);
}
}
*/
for (ID=0; ID<numprocs; ID++){
if (ID!=myid){
MPI_Isend(&SndA[myid][0], asize1, MPI_DOUBLE, ID, tag, mpi_comm_level1, &request);
}
}
for (ID=0; ID<numprocs; ID++){
if (ID!=myid){
MPI_Recv( &RcvA[ID][0], asize1/2, MPI_DOUBLE, ID, tag, mpi_comm_level1, &stat);
MPI_Recv( &RcvB[ID][0], asize1/2, MPI_DOUBLE, ID, tag, mpi_comm_level1, &stat);
}
}
MPI_Wait(&request,&stat);
MPI_Barrier(mpi_comm_level1);
dtime(&TEtime);
sum = 0.0;
for (i=0; i<asize1; i++){
sum += RcvA[1][i];
}
printf("myid=%2d elapsed time = %15.10f sum=%15.12f\n",myid,TEtime-TStime,sum);
MPI_Finalize();
}
void dtime(double *t)
{
// real time
struct timeval timev;
gettimeofday(&timev, NULL);
*t = timev.tv_sec + (double)timev.tv_usec*1e-6;
}
|
