如何解决在MPI中跨多个流程创建局部结构时出现分段错误
我对分布式并行编码非常陌生。 我试图在多个进程中创建结构（CountMin Sketch）的本地实例，然后在进程中独立初始化和更新这些本地草图，但是我遇到了分段错误。
结构是
struct CM_type{
long long count;
int depth;
int width;
int ** counts;
unsigned int *hasha,*hashb;
};
并且初始化和更新功能是
std::vector<CM_type> CM_Init(int width,int depth,int seed,std::vector<KmerPairs>
&all_kmers_from_procs1)
{
int j;
prng_type * prng;
prng=prng_Init(-abs(seed),2);
#pragma omp parallel shared (width,depth,prng) //private(j)
{
#pragma omp for
for(int i = 0; i < size; i++) //size is the number of processes
{
std::vector<CM_type> cm_loc;
cm_loc[i].depth=depth;
cm_loc[i].width=width;
cm_loc[i].count=0;
cm_loc[i].counts=(int **)calloc(sizeof(int *),cm_loc[i].width);
cm_loc[i].counts[0]=(int *)calloc(sizeof(int),cm_loc[i].depth*cm_loc[i].width);
cm_loc[i].hasha=(unsigned int *)calloc(sizeof(unsigned int),cm_loc[i].depth);
cm_loc[i].hashb=(unsigned int *)calloc(sizeof(unsigned int),cm_loc[i].depth);
if (cm_loc[i].counts && cm_loc[i].hasha && cm_loc[i].hashb && cm_loc[i].counts[i])
{
for (j=0;j<depth;j++)
{
cm_loc[i].hasha[j]=prng_int(prng) & MOD;
cm_loc[i].hashb[j]=prng_int(prng) & MOD;
// pick the hash functions
cm_loc[i].counts[j]=(int *) cm_loc[i].counts[0]+(j*cm_loc[i].width);
}
}
for (size_t it=0; it<all_kmers_from_procs1.size(); it++)
{
KmerPairs k_entry1; //KmerPairs is another structure which has two members
k_entry1.seq = all_kmers_from_procs1[it].seq;
k_entry1.k_count = all_kmers_from_procs1[it].k_count;
int loc = 0;
__sync_add_and_fetch(&cm_loc[i].count,all_kmers_from_procs1[it].k_count);
for(int b = 0; b < cm_loc[i].depth; b++)
{
cm_loc[i].counts[b][hash31(cm_loc[i].hasha[b],cm_loc[i].hashb[b],all_kmers_from_procs1[it].seq) %cm_loc[i].width]+= all_kmers_from_procs1[it].k_count;
printf("\nthe CM count is %d %d and the count is %llu \n",cm_loc[i].counts[b][hash31(cm_loc[i].hasha[b],all_kmers_from_procs1[it].seq) %cm_loc[i].width],cm_loc[i].count);
}
}
}
}
}
我的每个过程都有一个称为KmerPairs的结构，该结构具有2个成员（kmer序列和一个计数，该数字显示该特定kmer在该过程中存在多少次）。我想通过散列kmer序列（已转换为二进制）来创建本地最小计数草图，并由kmer的count成员增加最小计数草图中的计数。但是我遇到了这样的分段错误错误：
CountMin Sketch Started
[compute-2-9-ib:29987:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29949:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29950:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29951:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29952:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29953:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29954:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29955:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29956:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29960:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29963:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29965:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29970:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29973:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29976:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29979:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29981:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29983:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29985:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
[compute-2-9-ib:29948:0] Caught signal 11 (Segmentation fault: address not mapped to object at
address (nil))
那是我20个进程的20个分段错误。任何指导将不胜感激。我很乐意提供更多信息。谢谢。
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