Joey's Notes

Joey

0%

MPI常用函数及数据类型

发表于 更新于 分类于

其他MPI中会用到的函数数据类型：

  • MPI_Barrier - int MPI_Barrier( MPI_Comm comm )阻塞执行到当前位置的处理程序，直到communicator中所有处理程序都到达该位置
  • MPI_Wtime - double MPI_Wtime( void )返回调用这个函数的进程节点从创建开始经过的时间
  • MPI_Type_size - int MPI_Type_size(MPI_Datatype datatype, int *size)返回datatype所占有的字节数
  • MPI_Send - int MPI_Send(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)MPI发送数据函数，buf为发送缓冲区的起始地址，count为将发送的数据的个数，datatype为发送数据的数据类型，dest为目的进程的标识号，tag为消息标志，comm为通信域，该函数的返回值为MPI_SUCCESS时表示发送成功
  • MPI_Irecv = int MPI_Irecv(void *buf, int count, MPI_Datatype datatype, int source, int tag, MPI_Comm comm, MPI_Status *status)MPI接受数据函数，buf为接受缓冲区的起始地址，count为最多可接受的数据个数，datatype为接收数据的数据类型，source为接受数据的来源即发送数据的进程的进程标识号，tag为消息标识，与相应的发送操作的表示相匹配，comm为本进程和发送进程所在的通信域，status为返回状态
  • MPI_Bcast - int MPI_Bcast( void *buffer, int count, MPI_Datatype datatype, int root, MPI_Comm comm )从进程rank号为root的进程向通信域中的其他进程发送一条广播消息
  • MPI_Datatype - MPI数据类型枚举
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
typedef enum _MPI_Datatype {
  MPI_DATATYPE_NULL          = 0x0c000000,
  MPI_CHAR                   = 0x4c000101,
  MPI_UNSIGNED_CHAR          = 0x4c000102,
  MPI_SHORT                  = 0x4c000203,
  MPI_UNSIGNED_SHORT         = 0x4c000204,
  MPI_INT                    = 0x4c000405,
  MPI_UNSIGNED               = 0x4c000406,
  MPI_LONG                   = 0x4c000407,
  MPI_UNSIGNED_LONG          = 0x4c000408,
  MPI_LONG_LONG_INT          = 0x4c000809,
  MPI_LONG_LONG              = MPI_LONG_LONG_INT,
  MPI_FLOAT                  = 0x4c00040a,
  MPI_DOUBLE                 = 0x4c00080b,
  MPI_LONG_DOUBLE            = 0x4c00080c,
  MPI_BYTE                   = 0x4c00010d,
  MPI_WCHAR                  = 0x4c00020e,
  MPI_PACKED                 = 0x4c00010f,
  MPI_LB                     = 0x4c000010,
  MPI_UB                     = 0x4c000011,
  MPI_C_COMPLEX              = 0x4c000812,
  MPI_C_FLOAT_COMPLEX        = 0x4c000813,
  MPI_C_DOUBLE_COMPLEX       = 0x4c001614,
  MPI_C_LONG_DOUBLE_COMPLEX  = 0x4c001615,
  MPI_2INT                   = 0x4c000816,
  MPI_C_BOOL                 = 0x4c000117,
  MPI_SIGNED_CHAR            = 0x4c000118,
  MPI_UNSIGNED_LONG_LONG     = 0x4c000819,
  MPI_CHARACTER              = 0x4c00011a,
  MPI_INTEGER                = 0x4c00041b,
  MPI_REAL                   = 0x4c00041c,
  MPI_LOGICAL                = 0x4c00041d,
  MPI_COMPLEX                = 0x4c00081e,
  MPI_DOUBLE_PRECISION       = 0x4c00081f,
  MPI_2INTEGER               = 0x4c000820,
  MPI_2REAL                  = 0x4c000821,
  MPI_DOUBLE_COMPLEX         = 0x4c001022,
  MPI_2DOUBLE_PRECISION      = 0x4c001023,
  MPI_2COMPLEX               = 0x4c001024,
  MPI_2DOUBLE_COMPLEX        = 0x4c002025,
  MPI_REAL2                  = MPI_DATATYPE_NULL,
  MPI_REAL4                  = 0x4c000427,
  MPI_COMPLEX8               = 0x4c000828,
  MPI_REAL8                  = 0x4c000829,
  MPI_COMPLEX16              = 0x4c00102a,
  MPI_REAL16                 = MPI_DATATYPE_NULL,
  MPI_COMPLEX32              = MPI_DATATYPE_NULL,
  MPI_INTEGER1               = 0x4c00012d,
  MPI_COMPLEX4               = MPI_DATATYPE_NULL,
  MPI_INTEGER2               = 0x4c00022f,
  MPI_INTEGER4               = 0x4c000430,
  MPI_INTEGER8               = 0x4c000831,
  MPI_INTEGER16              = MPI_DATATYPE_NULL,
  MPI_INT8_T                 = 0x4c000133,
  MPI_INT16_T                = 0x4c000234,
  MPI_INT32_T                = 0x4c000435,
  MPI_INT64_T                = 0x4c000836,
  MPI_UINT8_T                = 0x4c000137,
  MPI_UINT16_T               = 0x4c000238,
  MPI_UINT32_T               = 0x4c000439,
  MPI_UINT64_T               = 0x4c00083a,
  MPI_AINT                   = 0x4c00083b (_WIN64), 0x4c00043b,
  MPI_OFFSET                 = 0x4c00083c,
  MPI_FLOAT_INT              = 0x8c000000,
  MPI_DOUBLE_INT             = 0x8c000001,
  MPI_LONG_INT               = 0x8c000002,
  MPI_SHORT_INT              = 0x8c000003,
  MPI_LONG_DOUBLE_INT        = 0x8c000004
} MPI_Datatype;