run_lstm_1b.sh
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#!/bin/bash
# Copyright 2012 Johns Hopkins University (author: Daniel Povey) Tony Robinson
# 2017 Hainan Xu
# 2017 Ke Li
# rnnlm/train_rnnlm.sh: best iteration (out of 10) was 3, linking it to final iteration.
# rnnlm/train_rnnlm.sh: train/dev perplexity was 80.6 / 179.5.
# Train objf: -332.70 -5.03 -4.65 -4.39 -4.20 -4.04 -3.91 -3.80 -3.70 -3.62
# Dev objf: -10.07 -5.52 -5.25 -5.19 -5.21 -5.24 -5.29 -5.32 -5.35 -5.39
# Begin configuration section.
dir=exp/rnnlm_lstm_1b
embedding_dim=800
embedding_l2=0.005 # embedding layer l2 regularize
comp_l2=0.005 # component-level l2 regularize
output_l2=0.005 # output-layer l2 regularize
epochs=160
stage=-10
train_stage=-10
. ./cmd.sh
. ./utils/parse_options.sh
[ -z "$cmd" ] && cmd=$train_cmd
text=data/train/text
wordlist=data/lang/words.txt
dev_sents=3000
text_dir=data/rnnlm/text
mkdir -p $dir/config
set -e
for f in $text $wordlist; do
[ ! -f $f ] && \
echo "$0: expected file $f to exist; search for local/prepare_data.sh and utils/prepare_lang.sh in run.sh" && exit 1
done
if [ $stage -le 0 ]; then
mkdir -p $text_dir
cat $text | cut -d ' ' -f2- | head -n $dev_sents> $text_dir/dev.txt
cat $text | cut -d ' ' -f2- | tail -n +$[$dev_sents+1] > $text_dir/hub.txt
fi
if [ $stage -le 1 ]; then
cp $wordlist $dir/config/
n=`cat $dir/config/words.txt | wc -l`
echo "<brk> $n" >> $dir/config/words.txt
# words that are not present in words.txt but are in the training or dev data, will be
# mapped to <unk> during training.
echo "<unk>" >$dir/config/oov.txt
cat > $dir/config/data_weights.txt <<EOF
hub 1 1.0
EOF
rnnlm/get_unigram_probs.py --vocab-file=$dir/config/words.txt \
--unk-word="<unk>" \
--data-weights-file=$dir/config/data_weights.txt \
$text_dir | awk 'NF==2' >$dir/config/unigram_probs.txt
# choose features
rnnlm/choose_features.py --unigram-probs=$dir/config/unigram_probs.txt \
--use-constant-feature=true \
--top-word-features 10000 \
--min-frequency 1.0e-03 \
--special-words='<s>,</s>,<brk>,<unk>' \
$dir/config/words.txt > $dir/config/features.txt
lstm_opts="l2-regularize=$comp_l2"
output_opts="l2-regularize=$output_l2"
cat >$dir/config/xconfig <<EOF
input dim=$embedding_dim name=input
lstm-layer name=lstm1 cell-dim=$embedding_dim $lstm_opts
lstm-layer name=lstm2 cell-dim=$embedding_dim $lstm_opts
output-layer name=output $output_opts include-log-softmax=false dim=$embedding_dim
EOF
rnnlm/validate_config_dir.sh $text_dir $dir/config
fi
if [ $stage -le 2 ]; then
# the --unigram-factor option is set larger than the default (100)
# in order to reduce the size of the sampling LM, because rnnlm-get-egs
# was taking up too much CPU (as much as 10 cores).
rnnlm/prepare_rnnlm_dir.sh --unigram-factor 100.0 \
$text_dir $dir/config $dir
fi
if [ $stage -le 3 ]; then
rnnlm/train_rnnlm.sh --embedding_l2 $embedding_l2 \
--stage $train_stage \
--num-epochs $epochs --cmd "$cmd" $dir
fi
exit 0