Question

我正在尝试使用已定义的库编写MPI程序。我有一名经理和多名工人。 main函数创建派生数据类型，管理器将其发送给worker。我在MPI_Isend函数中收到以下错误。我使用gdb跟踪错误。错误是：

Program received signal SIGSEGV, Segmentation fault.
__memmove_ssse3_back () at ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:2577
2577   ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S: No such file or directory

该程序包含一个main.cpp文件：

MPI_Aint extent ;
MPI_Datatype string_type; 
MPI_Datatype old_types[2] = {MPI_CHAR, MPI_INT};
int blocklen[2] = {NBR_ELEMENT,2} ;
MPI_Aint disp[2], base,member ;

base_string* str_data = new base_string(NBR_ELEMENT);
disp[0] = reinterpret_cast<const unsigned char*>(str_data->get_data()) - reinterpret_cast<const unsigned char*>(str_data) ;
disp[1] = reinterpret_cast<const unsigned char*>(str_data->get_length()) - reinterpret_cast<const unsigned char*>(str_data) ;

MPI_Type_create_struct(2, blocklen, disp, types, &string_type);
MPI_Type_commit(&string_type);

base_string在另一个有3个元素的库中。它的类包含以下功能：

inline const char*   get_data( void ) const;
inline       void    set_data( char* data, int32_t length = -1 );
inline       int32_t get_length( void ) const;

char*   _data;
int32_t _length;
int32_t _nb_blocks;

在manager.cpp包含MPI_Isend，我收到错误：

base_string* str_dna = new base_string(NBR_ELEMENT);
str_dna->set_data(data,NBR_ELEMENT);
MPI_Request request;
MPI_Status stat;
printf("SENDING data %s \n",str_dna->get_data());
MPI_Isend(str_dna, 1,string_type, 1, 0,MPI_COMM_WORLD,&request);

MPI_Isend中的分段错误

0 个答案: