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グリッドのノード間で天気データ構造体をMPI_Neighbor_alltoallで交換したいと考えています。私のプログラムはコンパイルされて実行されますが、交換されたデータは正しくありません。MPIデカルトトポロジ：MPI_Neighbor_alltoallが間違ったデータを送信します
私weatherdata構造体
typedef struct s_weatherdata{
// coordinates
float lon;
float lat;
// main
int pressure;
int humidity;
int temp;
// wind
int speed;
int deg;
}weatherdata;
カートスニペットの作成マイ
// Create Dimensions
MPI_Dims_create(size, ndims, dims);
// Create Cartesian
MPI_Cart_create(mycomm, ndims, dims, periods, 1, &cart_comm);
// Get the name of the processor
char processor_name[MPI_MAX_PROCESSOR_NAME];
int len;
MPI_Get_processor_name(processor_name, &len);
// Get coordinates
MPI_Cart_coords(cart_comm, rank, ndims, coord);
MPIのweatherdata構造体を作成
// create a type for weatherdata
const int nitems = 7;
int blocklengths[7] = {1,1,1,1,1,1,1};
MPI_Datatype types[7] = {MPI_FLOAT, MPI_FLOAT, MPI_INT, MPI_INT, MPI_INT, MPI_INT, MPI_INT};
MPI_Datatype tmp_mpi_weatherdata, mpi_weatherdata;
MPI_Aint offsets[7];
MPI_Aint lb, extent;
offsets[0] = offsetof(weatherdata, lon);
offsets[1] = offsetof(weatherdata, lat);
offsets[2] = offsetof(weatherdata, pressure);
offsets[3] = offsetof(weatherdata, humidity);
offsets[4] = offsetof(weatherdata, temp);
offsets[5] = offsetof(weatherdata, speed);
offsets[6] = offsetof(weatherdata, deg);
MPI_Type_create_struct(nitems, blocklengths, offsets, types, &tmp_mpi_weatherdata);
MPI_Type_get_extent(tmp_mpi_weatherdata, &lb, &extent);
MPI_Type_create_resized(tmp_mpi_weatherdata, lb, extent, &mpi_weatherdata);
MPI_Type_commit(&mpi_weatherdata);
weatherdata **recvdata = malloc(4*sizeof(weatherdata *));
weatherdata *data0 = malloc(4*(sizeof(weatherdata)));
weatherdata *data1 = data0+sizeof(weatherdata);
weatherdata *data2 = data1+sizeof(weatherdata);
weatherdata *data3 = data2+sizeof(weatherdata);
recvdata[0]=data0;
recvdata[1]=data1;
recvdata[2]=data2;
recvdata[3]=data3;
MPI_Neighbor_alltoall(my_data , 1, mpi_weatherdata, data0, 1, mpi_weatherdata, cart_comm);
printf("data0: %i %i\n", recvdata[0]->speed, recvdata[0]->deg);
printf("data1: %i %i\n", recvdata[1]->speed, recvdata[1]->deg);
printf("data2: %i %i\n", recvdata[2]->speed, recvdata[2]->deg);
printf("data3: %i %i\n", recvdata[3]->speed, recvdata[3]->deg);
私が必要とするのはweatherdata構造体から '速度'と 'deg'です。あなたがMPI_Neighbor_alltoallを使用したい場合、あなたなら、代わりの
weatherdata **recvdata = malloc(4*sizeof(weatherdata *));
あなたは
weatherdata recvdata[4];
を持っている必要があり
出力
mpicc -o prog_weather weather.c tools_weather.c jsmn/libjsmn.a -lm
mpirun -np 80 prog_weather 5.0 47.0 14.0 55.0 1
dims: [9] [8]
Process rank: 40, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [5][0]
data0: 64 0
data1: 0 0
data2: 32660 1
data3: 0 29807328
Process rank: 41, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [5][1]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 42, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [5][2]
data0: 64 0
data1: 0 0
data2: 32606 1
data3: 0 32248544
Process rank: 43, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [5][3]
data0: 64 0
data1: 0 0
data2: 32741 1
data3: 0 8250080
Process rank: 44, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [5][4]
data0: 64 0
data1: 0 0
data2: 32643 1
data3: 0 14066400
Process rank: 45, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [5][5]
data0: 64 0
data1: 0 0
data2: 32646 1
data3: 0 31564512
Process rank: 46, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [5][6]
data0: 64 0
data1: 32583 28214128
data2: 0 25712112
data3: 0 0
Process rank: 47, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [5][7]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 48, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [6][0]
data0: 64 0
data1: 32712 1938112176
data2: 0 25453888
data3: 0 25409520
Process rank: 49, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [6][1]
data0: 64 0
data1: 32739 172736176
data2: 0 12830016
data3: 0 12785648
Process rank: 50, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [6][2]
data0: 64 0
data1: 32557 36845344
data2: 32557 1
data3: 0 33977056
Process rank: 51, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [6][3]
data0: 64 0
data1: 32722 -1205793104
data2: 0 37106912
data3: 0 37062544
Process rank: 52, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [6][4]
data0: 64 0
data1: 32745 1562607280
data2: 0 35345632
data3: 0 35301264
Process rank: 53, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [6][5]
data0: 64 0
data1: 32547 -746242384
data2: 0 29332800
data3: 0 29288432
Process rank: 54, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [6][6]
data0: 64 0
data1: 32763 1657695920
data2: 0 18199776
data3: 0 18155408
Process rank: 55, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [6][7]
data0: 64 0
data1: 32675 99397296
data2: 0 14841152
data3: 0 14796784
Process rank: 56, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [7][0]
data0: 64 0
data1: 32549 434941616
data2: 0 40248640
data3: 0 40204272
Process rank: 57, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [7][1]
data0: 64 0
data1: 32676 28069552
data2: 0 34342256
data3: 0 34297888
Process rank: 58, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [7][2]
data0: 64 0
data1: 32620 -1602105680
data2: 0 37168352
data3: 0 37123984
Process rank: 59, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [7][3]
data0: 64 0
data1: 32563 17697648
data2: 32563 1
data3: 0 14828256
Process rank: 60, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [7][4]
data0: 64 0
data1: 32643 19327824
data2: 32643 1
data3: 0 16458464
Process rank: 61, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [7][5]
data0: 64 0
data1: 32668 25882288
data2: 0 39998784
data3: 0 39954416
Process rank: 62, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [7][6]
data0: 64 0
data1: 32542 29244144
data2: 32543 1
data3: 0 26374880
Process rank: 63, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [7][7]
data0: 64 0
data1: 32621 478269104
data2: 0 28558656
data3: 0 28514288
Process rank: 64, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [8][0]
data0: 64 0
data1: 0 33
data2: 0 17102144
data3: 0 17057776
Process rank: 65, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [8][1]
data0: 64 0
data1: 0 33
data2: 0 20526400
data3: 0 20482032
Process rank: 66, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [8][2]
data0: 64 0
data1: 32618 22001504
data2: 0 19498480
data3: 0 0
Process rank: 67, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [8][3]
data0: 64 0
data1: 32633 27649920
data2: 0 25146896
data3: 0 0
Process rank: 68, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [8][4]
data0: 64 0
data1: 32624 33851264
data2: 0 31348208
data3: 0 0
Process rank: 69, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [8][5]
data0: 64 0
data1: 0 33
data2: 32756 -1639239568
data3: 0 0
Process rank: 70, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [8][6]
data0: 64 0
data1: 0 33
data2: 32558 1921785968
data3: 0 0
Process rank: 71, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [8][7]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 37767920
Process rank: 0, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [0][0]
lb: 0
extent: 28
offsets: 0
offsets: 4
offsets: 8
offsets: 12
offsets: 16
offsets: 20
offsets: 24
data0: 0 0
data1: 32553 13450944
data2: 32553 1
data3: 0 10580704
Process rank: 1, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [0][1]
data0: 0 0
data1: 0 0
data2: 32684 1
data3: 0 30442208
Process rank: 2, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [0][2]
data0: 0 0
data1: 0 0
data2: 32631 1
data3: 0 7869152
Process rank: 3, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [0][3]
data0: 0 0
data1: 0 0
data2: 32594 1
data3: 0 24773344
Process rank: 4, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [0][4]
data0: 0 0
data1: 0 0
data2: 32514 1
data3: 0 16143072
Process rank: 5, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [0][5]
data0: 0 0
data1: 0 0
data2: 32584 1
data3: 0 17621728
Process rank: 6, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [0][6]
data0: 0 0
data1: 0 0
data2: 32632 1
data3: 0 40121056
Process rank: 7, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [0][7]
data0: 0 0
data1: 0 0
data2: 32550 1
data3: 0 39789280
Process rank: 8, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [1][0]
data0: 64 0
data1: 0 0
data2: 32669 1
data3: 0 38523616
Process rank: 9, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [1][1]
data0: 64 0
data1: 0 0
data2: 32654 1
data3: 0 11518688
Process rank: 10, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [1][2]
data0: 64 0
data1: 0 0
data2: 32666 1
data3: 0 21218016
Process rank: 11, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [1][3]
data0: 64 0
data1: 0 0
data2: 32607 1
data3: 0 18789088
Process rank: 12, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [1][4]
data0: 64 0
data1: 0 0
data2: 32626 1
data3: 0 25527008
Process rank: 13, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [1][5]
data0: 64 0
data1: 0 0
data2: 32634 1
data3: 0 17969888
Process rank: 14, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [1][6]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 15, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [1][7]
data0: 64 0
data1: 0 0
data2: 32509 1
data3: 0 34927328
Process rank: 16, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [2][0]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 17, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [2][1]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 18, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [2][2]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 19, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [2][3]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 20, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [2][4]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 21, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [2][5]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 22, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [2][6]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 23, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [2][7]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 24, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [3][0]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 25, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [3][1]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 26, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [3][2]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 27, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [3][3]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 28, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [3][4]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 29, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [3][5]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 30, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [3][6]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 31, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [3][7]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 32, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [4][0]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 33, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [4][1]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 34, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [4][2]
data0: 64 0
data1: 0 0
data2: 32617 1
data3: 0 28934880
Process rank: 35, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [4][3]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 36, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [4][4]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 37, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [4][5]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 38, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [4][6]
data0: 64 0
data1: 0 0
data2: 0 0
data3: 0 0
Process rank: 39, Total Processes in Comm: 72, Process Name: HP-250-G5-Notebook-PC, Coordinates [4][7]
data0: 64 0
data1: 0 0
data2: 32678 1
data3: 0 39498464
'MPI_Type_create_resized'呼び出しは、' MPI_Type_get_extent'があなたに与える下限と範囲を単純に使用しているので役に立たない。これは問題ではありません。特定の場合にはパディングがありません（エクステントは '28 'です。これは最後のフィールドのオフセット+' sizeof int'と同じです）。示されているように、出力は読みにくく、理解しにくいです。少なくとも、ランクのデカルト座標を表示してください。 –
私は全く新しい質問を出しました。これは私のプログラムの中核的な問題を記述しています。 https://stackoverflow.com/questions/45091962/mpi-cartesian-topology-mpi-neighbor-alltoall-wrong-data-received – AlKappa