From fb205d034960c42c37475318d39631ff6e2c7357 Mon Sep 17 00:00:00 2001
From: Chris Dyer <cdyer@cs.cmu.edu>
Date: Thu, 14 Apr 2011 22:22:22 -0400
Subject: mpi optimizations

---
 training/mpi_batch_optimize.cc | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/training/mpi_batch_optimize.cc b/training/mpi_batch_optimize.cc
index 11be8bbe..5a6bf301 100644
--- a/training/mpi_batch_optimize.cc
+++ b/training/mpi_batch_optimize.cc
@@ -4,6 +4,7 @@
 #include <cassert>
 #include <cmath>
 
+#include "config.h"
 #ifdef HAVE_MPI
 #include <boost/mpi/timer.hpp>
 #include <boost/mpi.hpp>
@@ -333,20 +334,23 @@ int main(int argc, char** argv) {
   TrainingObserver observer;
   while (!converged) {
     observer.Reset();
+#ifdef HAVE_MPI
+    world.barrier();
+#endif
     if (rank == 0) {
       cerr << "Starting decoding... (~" << corpus.size() << " sentences / proc)\n";
     }
     decoder->SetWeights(lambdas);
     for (int i = 0; i < corpus.size(); ++i)
       decoder->Decode(corpus[i], &observer);
-
+    cerr << "  process " << rank << '/' << size << " done\n";
     fill(gradient.begin(), gradient.end(), 0);
     fill(rcv_grad.begin(), rcv_grad.end(), 0);
     observer.SetLocalGradientAndObjective(&gradient, &objective);
 
     double to = 0;
 #ifdef HAVE_MPI
-    mpi::reduce(world, &gradient[0], &rcv_grad[0], gradient.size(), plus<double>(), 0);
+    mpi::reduce(world, &gradient[0], gradient.size(), &rcv_grad[0], plus<double>(), 0);
     mpi::reduce(world, objective, to, plus<double>(), 0);
     swap(gradient, rcv_grad);
     objective = to;
@@ -398,9 +402,8 @@ int main(int argc, char** argv) {
     }  // rank == 0
     int cint = converged;
 #ifdef HAVE_MPI
-    mpi::broadcast(world, lambdas, 0);
+    mpi::broadcast(world, &lambdas[0], lambdas.size(), 0);
     mpi::broadcast(world, cint, 0);
-    world.barrier();
 #endif
     converged = cint;
   }
-- 
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