Last active
July 10, 2021 05:44
-
-
Save nariaki3551/00e5cbe316cb5a3ac299d389da7714f0 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include <iostream> | |
#include <mpi.h> | |
#include <vector> | |
#include <deque> | |
#include <progresscpp/ProgressBar.hpp> | |
int main( int argc, char *argv[] ) { | |
int size, rank; | |
MPI_Init( &argc, &argv ); | |
MPI_Comm_size( MPI_COMM_WORLD, &size ); | |
MPI_Comm_rank( MPI_COMM_WORLD, &rank ); | |
int n = 1000000; // job数 | |
int N = 100; // rank>0の実行job数の送信間隔 | |
int M = 100; // rank=0の受信確認間隔 | |
int job_tag = 0; // job数送信時に使用するtag | |
int fin_tag = 1; // 全てのjobの完了時に使用するtag | |
int flag; // メッセージパッシング用 | |
MPI_Status *status; // メッセージパッシング用 | |
MPI_Request *request; // メッセージパッシング用 | |
// initialize the bar | |
progresscpp::ProgressBar progressBar(n, 70); | |
/// | |
/// iprobe + receive | |
/// | |
auto iprobeRecv = [&flag, &status, &job_tag, &fin_tag, &progressBar](int source, int tag) { | |
// rank=sourceからメッセージが来ていないかを確認 | |
MPI_Iprobe(source, tag, MPI_COMM_WORLD, &flag, status); | |
if ( flag == 1 ) { | |
// メッセージが来ていたら受信 | |
if ( tag == job_tag ) { | |
int k = 0; | |
MPI_Recv(&k, 1, MPI_INT, source, tag, MPI_COMM_WORLD, status); | |
for ( int i = 0; i < k; i++ ) ++progressBar; | |
} else if ( tag == fin_tag ) { | |
MPI_Recv(NULL, 0, MPI_BYTE, source, fin_tag, MPI_COMM_WORLD, status); | |
} | |
} | |
return flag; | |
}; | |
/// | |
/// main | |
/// | |
std::deque< std::pair<MPI_Request, int> > deq_req; // Isendオブジェクトの保存用 | |
int k = 0; | |
for ( int i = rank; i < n; i += size ) { | |
// 何かしらのjobをした | |
++k; | |
if( rank == 0 ) { | |
if ( k > M ) { | |
// メッセージを受信しているかを確認 | |
for ( int source = 1; source < size; source++ ) { | |
iprobeRecv(source, job_tag); | |
} | |
k = 0; | |
} | |
} else { | |
if ( k > N ) { | |
// 送信済みrequestを削除 | |
for ( auto it = deq_req.begin(); it != deq_req.end(); ) { | |
MPI_Test(&(it->first), &flag, status); | |
if ( flag == 1 ) | |
it = deq_req.erase(it); | |
else | |
++it; | |
} | |
// 前回送信から新たに行ったjob数を送信 | |
auto req_pair = std::make_pair(MPI_Request(), k); | |
deq_req.push_back(req_pair); // 要素をコピーして末尾に追加 | |
MPI_Isend(&(deq_req.back().second), 1, MPI_INT, 0, job_tag, MPI_COMM_WORLD, &(deq_req.back().first) );); | |
k = 0; | |
} | |
} | |
// 進捗バーを表示 | |
if ( rank == 0 ) { | |
++progressBar; | |
progressBar.display(); | |
} | |
} | |
/// | |
/// Post Process | |
/// | |
if ( rank > 0 ) { | |
for ( auto &req_pair : deq_req ) { | |
MPI_Wait(&(req_pair.first), status); | |
} | |
MPI_Send(&k, 1, MPI_INT, 0, job_tag, MPI_COMM_WORLD); | |
MPI_Send(NULL, 0, MPI_BYTE, 0, fin_tag, MPI_COMM_WORLD); | |
} else { | |
for ( int source = 1; source < size; source++ ) { | |
// end_tagを受け取るまでiprob | |
while ( !iprobeRecv(source, fin_tag) ) { | |
iprobeRecv(source, job_tag); | |
} | |
progressBar.display(); | |
} | |
progressBar.display(); | |
std::cout << std::endl; | |
} | |
MPI_Finalize(); | |
return 0; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment