Fortran FORTRAN MPI_REDUCE(SENDBUF, RECVBUF,COUNT, DATATYPE, OP, ROOT, COMM, IERROR) <type> SENDBUF(*), RECVBUF(*)INTEGERCOUNT, DATATYPE, OP, ROOT, COMM, IERROR 備註 MPI_Reduce函式會實作,並假設指定的作業具有關聯性。 所有預先定義的作業都是設計成關聯和通通。 用戶可以定義設計為關聯的作...
Fortran 顯示其他 2 個 結合值和散布結果。 語法 c++ 複製 int MPIAPI MPI_Reduce_scatter( _In_ void *sendbuf, _Out_ void *recvbuf, _In_ int *recvcounts, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm ); 參數 sendbuf [in] 傳送緩衝區的起始位址。 recvbuf [out] 接收緩衝區的...
这个是错误的写法,但是很多情况下照算不误。 这个是正确的写法。 就是我们平时用的是c++,对应的整数是MPI_INT,但是一不小心写成了MPI_INTEGETR(Fortran的写法),在很多环境下居然还能正常运行,只有在这个环境出错了,说明这个环境检测的比较严格。当然了,在其它环境能运行不代表结果就对了,即使结果撞大运碰巧正确了(...
FORTRAN Copy MPI_REDUCE(SENDBUF, RECVBUF, COUNT, DATATYPE, OP, ROOT, COMM, IERROR) <type> SENDBUF(*), RECVBUF(*) INTEGER COUNT, DATATYPE, OP, ROOT, COMM, IERROR Remarks The MPI_Reduce function is implemented with the assumption that the specified operation is associative. All prede...
Intel® Fortran Compiler 0 Kudos Reply Juergen_R_R Valued Contributor II 09-18-2018 03:15 AM 1,520 Views I think there is also a dedicated MPI forum here on Intel. Maybe you should post this issue there. View solution in original post Translate 0...
Using 64-bit integers as default (ILP64 model) in my little Fortran program i obtain wrong results when i use MPI_IN_PLACE in MPI_REDUCE calls (both for integer and real(8)): my code is as follows: [fortran] program test include "mpif.h...
程序计算是一个很普遍的存在,但是语言的计算精度却是一个困扰人的问题,比说说,计算0.1+0.2,0.3...
MPI其实是一套标准,对C,C++,Fortran,Java,Python等都规定了一系列的接口,MPI的内部有一系列的函数,比如获取当前有多少进程MPI_Comm_size, 进程间同步MPI_Barrier等函数。对每种支持的语言,MPI都定了一个函数接口,也保证了不同的实现下,MPI的程序写出来都是一样的。MPI是一个在学术界和工业界都应用非常广泛的...
课程推荐等。 ytk-learn 分布式机器学习库 项目背景 LR(Logistic Regression), GBDT(Gradient Boosting ...
Our open-source library is written in C++, is callable from C++, C, Fortran, or scripting languages such as Python, and can run on any parallel platform that supports MPI.doi:10.1016/j.parco.2011.02.004Steven J. PlimptonSandia National LaboratoriesKaren D. Devine...