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View Code? Open in Web Editor NEWA lightweight graph computation platform in C/C++
A lightweight graph computation platform in C/C++
for (; ! pmsgs->done(); pmsgs->next()){ Neighbor myneighbor; memcpy(&myneighbor,&pmsgs->getValue(),sizeof(Neighbor)); }
如果改成
for (; ! pmsgs->done(); pmsgs->next()){ Neighbor myneighbor; memcpy(&myneighbor,&pmsgs->getValue(),sizeof(Neighbor)); memset(&myneighbor,0,sizeof(Neighbor)); }
则没用问题,但没有意义了
bin/setenv的换行符是用\r\n结尾的,直接下载下来并拷贝到虚拟机上,在我的电脑上出现了无法正确配置环境变量的问题
void loadGraph() {
unsigned long long last_vertex;
unsigned long long from;
unsigned long long to;
double weight = 0;
double value = INF; //init value as INF
int outdegree = 0;
const char *line= getEdgeLine();
// Note: modify this if an edge weight is to be read
// modify the 'weight' variable
sscanf(line, "%lld %lld %lf", &from, &to, &weight);
addEdge(from, to, &weight);
last_vertex = from;
++outdegree;
for (int64_t i = 1; i < m_total_edge; ++i) {
line= getEdgeLine();
// Note: modify this if an edge weight is to be read
// modify the 'weight' variable
sscanf(line, "%lld %lld %lf", &from, &to, &weight);
if (last_vertex != from) {
addVertex(last_vertex, &value, outdegree);
last_vertex = from;
outdegree = 1;
} else {
++outdegree;
}
addEdge(from, to, &weight);
}
addVertex(last_vertex, &value, outdegree);
}
};
定义 INF = 1000000
在compute()函数中打印每个节点的value值,发现只有一部分是预先设置的INF, 另一部分节点的value为0。
没能发现我所写代码的逻辑问题, 所以提出这个可能的issue。
For example, if I have a graph like this:
7
8
0 1
0 2
1 2
3 1
3 2
4 5
4 6
5 6
It will be divided into 4 part as default. So the input for the third worker will be:
2
0
So there will be no edge in this input, and this will be invalid input of the program according to the code in loadGraph() function. But obviously it should not be invalid input because it is possible to have a graph like this. When I run the program, it will show me "Sender: connect: Connection refused".
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