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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* File : SendRecv.java
* Author : Sang Lim
* Revision : $Revision: 1.1.1.1 $
* Updated : $Date: 2005/03/19 16:06:39 $
*/
import mpjdev.*;
import mpjbuf.*;
import java.io.*;
public class SendRecv {
public static void main(String[] args) throws Exception {
Comm.init(args);
Buffer wb = new Buffer(500);
int id = Comm.WORLD.id();
int size = Comm.WORLD.size();
if (id == 0) {
float[] fArray0 = new float[50];
for (int i = 0; i < fArray0.length; i++)
fArray0[i] = i;
wb.putSectionHeader(Buffer.FLOAT);
wb.write(fArray0, 0, fArray0.length);
int[] indexes = new int[30];
indexes[0] = 10;
indexes[1] = 2;
indexes[5] = 4;
indexes[6] = 3;
int srcOff = 7, rank = 2, exts = 5, strs = 0;
wb.strGather(fArray0, srcOff, rank, exts, strs, indexes);
indexes[0] = 0;
indexes[1] = 1;
for (int i = 2; i < 30; i++)
indexes[i] = indexes[i - 1] + 2;
wb.gather(fArray0, 24, 2, indexes);
indexes[0] = 0;
indexes[1] = 0;
for (int i = 2; i < 30; i++)
indexes[i] = indexes[i - 1] + 2;
wb.gather(fArray0, 24, 2, indexes);
wb.commit();
Comm.WORLD.send(wb, 1, 99);
}
else if (id == 1) {
Buffer rb = new Buffer(500);
Comm.WORLD.recv(rb, 0, 99);
rb.commit();
float[] rArray0 = new float[50];
int numEls = rb.getSectionHeader(Buffer.FLOAT);
System.out.println("numEls (as read by getSectionHeader()" + numEls);
rb.read(rArray0, 0, rArray0.length);
System.out.println("******* WRITE SECTION OF MESSAGE *******");
for (int i = 0; i < rArray0.length; i++)
System.out.println("First section of message[" + i + "] = " + rArray0[i]);
rb.read(rArray0, 0, 12);
System.out.println("\n\n******* READ SECTION OF MESSAGE *******");
for (int i = 0; i < 12; i++)
System.out.println("First section of message[" + i + "] = " +
rArray0[i]);
rb.read(rArray0, 0, 24);
System.out.println("\n\n******* ODD GATHER SECTION OF MESSAGE *******");
for (int i = 0; i < 24; i++)
System.out.println("First section of message[" + i + "] = " +
rArray0[i]);
System.out.println("\n\n******* EVEN GATHER SECTION OF MESSAGE *******");
rb.read(rArray0, 0, 24);
for (int i = 0; i < 24; i++)
System.out.println("Second section of message[" + i + "] = " +
rArray0[i]);
System.out.println("\n\n******* STRGATHER SECTION OF MESSAGE *******");
rb.commit(); // Rewind buffer
rb.getSectionHeader(Buffer.FLOAT);
rb.read(rArray0, 0, 50);
for (int i = 0; i < 50; i++)
rArray0[i] = 0;
int[] indexes = new int[30];
for (int i = 0; i < 50; i++)
rArray0[i] = 0;
indexes[0] = 10;
indexes[1] = 2;
indexes[5] = 4;
indexes[6] = 3;
int dstOff = 7, rank = 2, exts = 5, strs = 0;
rb.strScatter(rArray0, dstOff, rank, exts, strs, indexes);
System.out.println("\n\n******* STRSCATTERED MESSAGE *******");
for (int i = 0; i < 50; i++)
System.out.println("StrScatter of message[" + i + "] = " +
rArray0[i]);
indexes[0] = 0;
indexes[1] = 1;
for (int i = 2; i < 30; i++)
indexes[i] = indexes[i - 1] + 2;
rb.scatter(rArray0, 24, 2, indexes);
indexes[0] = 0;
indexes[1] = 0;
for (int i = 2; i < 30; i++)
indexes[i] = indexes[i - 1] + 2;
rb.scatter(rArray0, 24, 2, indexes);
System.out.println("\n\n******* SCATTERED MESSAGE *******");
for (int i = 0; i < 50; i++)
System.out.println("Scattered message[" + i + "] = " + rArray0[i]);
}
//Comm.WORLD.barrier();
Comm.finish();
}
}
|
