From 01739cab52552013a68843d2f64b02e868dcd281 Mon Sep 17 00:00:00 2001
From: "trevor.cohn" <trevor.cohn@ec762483-ff6d-05da-a07a-a48fb63a330f>
Date: Fri, 23 Jul 2010 19:26:17 +0000
Subject: Parallelised VB-EM

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@384 ec762483-ff6d-05da-a07a-a48fb63a330f
---
 .../prjava/src/phrase/Trainer.java                 | 83 +++++++++++++++-------
 1 file changed, 56 insertions(+), 27 deletions(-)

(limited to 'gi/posterior-regularisation/prjava/src/phrase/Trainer.java')

diff --git a/gi/posterior-regularisation/prjava/src/phrase/Trainer.java b/gi/posterior-regularisation/prjava/src/phrase/Trainer.java
index f205ce67..6f302b20 100644
--- a/gi/posterior-regularisation/prjava/src/phrase/Trainer.java
+++ b/gi/posterior-regularisation/prjava/src/phrase/Trainer.java
@@ -4,11 +4,12 @@ import io.FileUtil;
 import joptsimple.OptionParser;
 import joptsimple.OptionSet;
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.PrintStream;
 import java.util.List;
 import java.util.Random;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 import phrase.Corpus.Edge;
 
@@ -18,7 +19,6 @@ public class Trainer
 {
 	public static void main(String[] args) 
 	{
-		
         OptionParser parser = new OptionParser();
         parser.accepts("help");
         parser.accepts("in").withRequiredArg().ofType(File.class);
@@ -68,6 +68,10 @@ public class Trainer
 		if (options.has("seed"))
 			F.rng = new Random((Long) options.valueOf("seed"));
 		
+		ExecutorService threadPool = null;
+		if (threads > 0)
+			threadPool = Executors.newFixedThreadPool(threads);			
+		
 		if (tags <= 1 || scale_phrase < 0 || scale_context < 0 || threshold < 0)
 		{
 			System.err.println("Invalid arguments. Try again!");
@@ -114,26 +118,30 @@ public class Trainer
  			agree = new Agree(tags, corpus);
  		else
  		{
- 			cluster = new PhraseCluster(tags, corpus);
- 			if (threads > 0) cluster.useThreadPool(threads);
- 			
- 			if (vb)	{
- 				//cluster.initialiseVB(alphaEmit, alphaPi);
+ 			if (vb)	
+ 			{
  				vbModel=new VB(tags,corpus);
  				vbModel.alpha=alphaPi;
  				vbModel.lambda=alphaEmit;
- 			}
- 			if (options.has("no-parameter-cache")) 
- 				cluster.cacheLambda = false;
- 			if (options.has("start"))
+ 	 			if (threadPool != null) vbModel.useThreadPool(threadPool);
+ 			} 
+ 			else 
  			{
- 				try {
-					System.err.println("Reading starting parameters from " + options.valueOf("start"));
-					cluster.loadParameters(FileUtil.reader((File)options.valueOf("start")));
-				} catch (IOException e) {
-					System.err.println("Failed to open input file: " + options.valueOf("start"));
-					e.printStackTrace();
-				}
+ 				cluster = new PhraseCluster(tags, corpus);
+ 	 			if (threadPool != null) cluster.useThreadPool(threadPool);
+ 				
+	 			if (options.has("no-parameter-cache")) 
+	 				cluster.cacheLambda = false;
+	 			if (options.has("start"))
+	 			{
+	 				try {
+						System.err.println("Reading starting parameters from " + options.valueOf("start"));
+						cluster.loadParameters(FileUtil.reader((File)options.valueOf("start")));
+					} catch (IOException e) {
+						System.err.println("Failed to open input file: " + options.valueOf("start"));
+						e.printStackTrace();
+					}
+	 			}
  			}
  		}
 				
@@ -143,9 +151,8 @@ public class Trainer
 			double o;
 			if (agree != null)
 				o = agree.EM();
-			else if(agree2sides!=null){
+			else if(agree2sides!=null)
 				o = agree2sides.EM();
-			}
 			else
 			{
 				if (i < skip)
@@ -173,11 +180,25 @@ public class Trainer
 			last = o;
 		}
 		
-		if (cluster == null)
-			cluster = agree.model1;
+		double pl1lmax = 0, cl1lmax = 0;
+		if (cluster != null)
+		{
+			pl1lmax = cluster.phrase_l1lmax();
+			cl1lmax = cluster.context_l1lmax();
+		}
+		else if (agree != null)
+		{
+			// fairly arbitrary choice of model1 cf model2
+			pl1lmax = agree.model1.phrase_l1lmax();
+			cl1lmax = agree.model1.context_l1lmax();
+		}
+		else if (agree2sides != null)
+		{
+			// fairly arbitrary choice of model1 cf model2
+			pl1lmax = agree2sides.model1.phrase_l1lmax();
+			cl1lmax = agree2sides.model1.context_l1lmax();
+		}
 
-		double pl1lmax = cluster.phrase_l1lmax();
-		double cl1lmax = cluster.context_l1lmax();
 		System.out.println("\nFinal posterior phrase l1lmax " + pl1lmax + " context l1lmax " + cl1lmax);
 		
 		if (options.has("out"))
@@ -194,11 +215,18 @@ public class Trainer
 					System.out.println("Reading testing concordance from " + infile);
 					test = corpus.readEdges(FileUtil.reader(infile));
 				}
-				if(vb){
+				if(vb) {
+					assert !options.has("test");
 					vbModel.displayPosterior(ps);
-				}else{
+				} else if (cluster != null) 
 					cluster.displayPosterior(ps, test);
+				else if (agree != null) 
+					agree.displayPosterior(ps, test);
+				else if (agree2sides != null) {
+					assert !options.has("test");
+					agree2sides.displayPosterior(ps);
 				}
+				
 				ps.close();
 			} catch (IOException e) {
 				System.err.println("Failed to open either testing file or output file");
@@ -209,6 +237,7 @@ public class Trainer
 
 		if (options.has("parameters"))
 		{
+			assert !vb;
 			File outfile = (File) options.valueOf("parameters");
 			PrintStream ps;
 			try {
@@ -222,7 +251,7 @@ public class Trainer
 			}
 		}
 		
-		if (cluster.pool != null)
+		if (cluster != null && cluster.pool != null)
 			cluster.pool.shutdown();
 	}
 }
-- 
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