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我正在用C++編寫一個帶有MPI庫的程序。只有一個節點發生死鎖!我不使用發送或接收集體操作,但只使用兩個集體功能(MPI_Allreduce
和MPI_Bcast
)。 如果有節點等待其他節點發送或接收,我實際上並不明白是什麼導致了這種死鎖。具有集體功能的MPI死鎖
void ParaStochSimulator::first_reacsimulator() {
SimulateSingleRun();
}
double ParaStochSimulator::deterMinTau() {
//calcualte minimum tau for this process
l_nLocalMinTau = calc_tau(); //min tau for each node
MPI_Allreduce(&l_nLocalMinTau, &l_nGlobalMinTau, 1, MPI_DOUBLE, MPI_MIN, MPI_COMM_WORLD);
//min tau for all nodes
//check if I have the min value
if (l_nLocalMinTau <= l_nGlobalMinTau && m_nCurrentTime < m_nOutputEndPoint) {
FireTransition(m_nMinTransPos);
CalculateAllHazardValues();
}
return l_nGlobalMinTau;
}
void ParaStochSimulator::SimulateSingleRun() {
//prepare a run
PrepareRun();
while ((m_nCurrentTime < m_nOutputEndPoint) && IsSimulationRunning()) {
deterMinTau();
if (mnprocess_id == 0) { //master
SimulateSingleStep();
std::cout << "current time:*****" << m_nCurrentTime << std::endl;
broad_casting(m_nMinTransPos);
MPI_Bcast(&l_anMarking, l_nMinplacesPos.size(), MPI_DOUBLE, 0, MPI_COMM_WORLD);
//std::cout << "size of mani place :" << l_nMinplacesPos.size() << std::endl;
}
}
MPI_Bcast(&l_anMarking, l_nMinplacesPos.size(), MPI_DOUBLE, 0, MPI_COMM_WORLD);
PostProcessRun();
}
謝謝你的幫助,但不幸的是我已刪除的廣播形成主,仍有死鎖-_- –