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Scripts/steps/nnet2/train_tanh.sh
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#!/bin/bash
# Copyright 2012 Johns Hopkins University (Author: Daniel Povey). Apache 2.0.
# This script trains a fairly vanilla network with tanh nonlinearities.
# Begin configuration section.
cmd=run.pl
num_epochs=15 # Number of epochs during which we reduce
# the learning rate; number of iteration is worked out from this.
num_epochs_extra=5 # Number of epochs after we stop reducing
# the learning rate.
num_iters_final=20 # Maximum number of final iterations to give to the
# optimization over the validation set.
initial_learning_rate=0.04
final_learning_rate=0.004
bias_stddev=0.0
shrink_interval=5 # shrink every $shrink_interval iters except while we are
# still adding layers, when we do it every iter.
shrink=true
num_frames_shrink=2000 # note: must be <= --num-frames-diagnostic option to get_egs.sh, if
# given.
softmax_learning_rate_factor=0.5 # Train this layer half as fast as the other layers.
hidden_layer_dim=300 # You may want this larger, e.g. 1024 or 2048.
minibatch_size=128 # by default use a smallish minibatch size for neural net
# training; this controls instability which would otherwise
# be a problem with multi-threaded update. Note: it also
# interacts with the "preconditioned" update which generally
# works better with larger minibatch size, so it's not
# completely cost free.
samples_per_iter=200000 # each iteration of training, see this many samples
# per job. This option is passed to get_egs.sh
num_jobs_nnet=16 # Number of neural net jobs to run in parallel. This option
# is passed to get_egs.sh.
get_egs_stage=0
spk_vecs_dir=
shuffle_buffer_size=5000 # This "buffer_size" variable controls randomization of the samples
# on each iter. You could set it to 0 or to a large value for complete
# randomization, but this would both consume memory and cause spikes in
# disk I/O. Smaller is easier on disk and memory but less random. It's
# not a huge deal though, as samples are anyway randomized right at the start.
add_layers_period=2 # by default, add new layers every 2 iterations.
num_hidden_layers=3
stage=-5
io_opts="-tc 5" # for jobs with a lot of I/O, limits the number running at one time.
splice_width=4 # meaning +- 4 frames on each side for second LDA
randprune=4.0 # speeds up LDA.
alpha=4.0
max_change=10.0
mix_up=0 # Number of components to mix up to (should be > #tree leaves, if
# specified.)
num_threads=16
parallel_opts="-pe smp $num_threads" # using a smallish #threads by default, out of stability concerns.
# note: parallel_opts doesn't automatically get adjusted if you adjust num-threads.
cleanup=true
egs_dir=
lda_opts=
egs_opts=
# End configuration section.
echo "$0 $@" # Print the command line for logging
if [ -f path.sh ]; then . ./path.sh; fi
. parse_options.sh || exit 1;
if [ $# != 4 ]; then
echo "Usage: $0 [opts] <data> <lang> <ali-dir> <exp-dir>"
echo " e.g.: $0 data/train data/lang exp/tri3_ali exp/tri4_nnet"
echo ""
echo "Main options (for others, see top of script file)"
echo " --config <config-file> # config file containing options"
echo " --cmd (utils/run.pl|utils/queue.pl <queue opts>) # how to run jobs."
echo " --num-epochs <#epochs|15> # Number of epochs of main training"
echo " # while reducing learning rate (determines #iterations, together"
echo " # with --samples-per-iter and --num-jobs-nnet)"
echo " --num-epochs-extra <#epochs-extra|5> # Number of extra epochs of training"
echo " # after learning rate fully reduced"
echo " --initial-learning-rate <initial-learning-rate|0.02> # Learning rate at start of training, e.g. 0.02 for small"
echo " # data, 0.01 for large data"
echo " --final-learning-rate <final-learning-rate|0.004> # Learning rate at end of training, e.g. 0.004 for small"
echo " # data, 0.001 for large data"
echo " --num-hidden-layers <#hidden-layers|2> # Number of hidden layers, e.g. 2 for 3 hours of data, 4 for 100hrs"
echo " --initial-num-hidden-layers <#hidden-layers|1> # Number of hidden layers to start with."
echo " --add-layers-period <#iters|2> # Number of iterations between adding hidden layers"
echo " --mix-up <#pseudo-gaussians|0> # Can be used to have multiple targets in final output layer,"
echo " # per context-dependent state. Try a number several times #states."
echo " --num-jobs-nnet <num-jobs|8> # Number of parallel jobs to use for main neural net"
echo " # training (will affect results as well as speed; try 8, 16)"
echo " # Note: if you increase this, you may want to also increase"
echo " # the learning rate."
echo " --num-threads <num-threads|16> # Number of parallel threads per job (will affect results"
echo " # as well as speed; may interact with batch size; if you increase"
echo " # this, you may want to decrease the batch size."
echo " --parallel-opts <opts|\"-pe smp 16\"> # extra options to pass to e.g. queue.pl for processes that"
echo " # use multiple threads."
echo " --io-opts <opts|\"-tc 10\"> # Options given to e.g. queue.pl for jobs that do a lot of I/O."
echo " --minibatch-size <minibatch-size|128> # Size of minibatch to process (note: product with --num-threads"
echo " # should not get too large, e.g. >2k)."
echo " --samples-per-iter <#samples|400000> # Number of samples of data to process per iteration, per"
echo " # process."
echo " --splice-width <width|4> # Number of frames on each side to append for feature input"
echo " # (note: we splice processed, typically 40-dimensional frames"
echo " --lda-dim <dim|250> # Dimension to reduce spliced features to with LDA"
echo " --num-iters-final <#iters|10> # Number of final iterations to give to nnet-combine-fast to "
echo " # interpolate parameters (the weights are learned with a validation set)"
echo " --num-utts-subset <#utts|300> # Number of utterances in subsets used for validation and diagnostics"
echo " # (the validation subset is held out from training)"
echo " --num-frames-diagnostic <#frames|4000> # Number of frames used in computing (train,valid) diagnostics"
echo " --num-valid-frames-combine <#frames|10000> # Number of frames used in getting combination weights at the"
echo " # very end."
echo " --stage <stage|-9> # Used to run a partially-completed training process from somewhere in"
echo " # the middle."
exit 1;
fi
data=$1
lang=$2
alidir=$3
dir=$4
# Check some files.
for f in $data/feats.scp $lang/L.fst $alidir/ali.1.gz $alidir/final.mdl $alidir/tree; do
[ ! -f $f ] && echo "$0: no such file $f" && exit 1;
done
# Set some variables.
num_leaves=`gmm-info $alidir/final.mdl 2>/dev/null | awk '/number of pdfs/{print $NF}'` || exit 1;
nj=`cat $alidir/num_jobs` || exit 1; # number of jobs in alignment dir...
# in this dir we'll have just one job.
sdata=$data/split$nj
utils/split_data.sh $data $nj
mkdir -p $dir/log
echo $nj > $dir/num_jobs
splice_opts=`cat $alidir/splice_opts 2>/dev/null`
cp $alidir/splice_opts $dir 2>/dev/null
cp $alidir/tree $dir
# Get list of validation utterances.
awk '{print $1}' $data/utt2spk | utils/shuffle_list.pl | head -$num_utts_subset \
> $dir/valid_uttlist || exit 1;
awk '{print $1}' $data/utt2spk | utils/filter_scp.pl --exclude $dir/valid_uttlist | \
head -$num_utts_subset > $dir/train_subset_uttlist || exit 1;
if [ $stage -le -4 ]; then
echo "$0: calling get_lda.sh"
steps/nnet2/get_lda.sh $lda_opts --splice-width $splice_width --cmd "$cmd" $data $lang $alidir $dir || exit 1;
fi
# these files will have been written by get_lda.sh
feat_dim=`cat $dir/feat_dim` || exit 1;
lda_dim=`cat $dir/lda_dim` || exit 1;
if [ $stage -le -3 ] && [ -z "$egs_dir" ]; then
echo "$0: calling get_egs.sh"
[ ! -z $spk_vecs_dir ] && spk_vecs_opt="--spk-vecs-dir $spk_vecs_dir";
steps/nnet2/get_egs.sh $spk_vecs_opt --samples-per-iter $samples_per_iter --num-jobs-nnet $num_jobs_nnet \
--splice-width $splice_width --stage $get_egs_stage --cmd "$cmd" $egs_opts \
$data $lang $alidir $dir || exit 1;
fi
if [ -z $egs_dir ]; then
egs_dir=$dir/egs
fi
iters_per_epoch=`cat $egs_dir/iters_per_epoch` || exit 1;
! [ $num_jobs_nnet -eq `cat $egs_dir/num_jobs_nnet` ] && \
echo "$0: Warning: using --num-jobs-nnet=`cat $egs_dir/num_jobs_nnet` from $egs_dir"
num_jobs_nnet=`cat $egs_dir/num_jobs_nnet`
if ! [ $num_hidden_layers -ge 1 ]; then
echo "Invalid num-hidden-layers $num_hidden_layers"
exit 1
fi
if [ $stage -le -2 ]; then
echo "$0: initializing neural net";
# Get spk-vec dim (in case we're using them).
if [ ! -z "$spk_vecs_dir" ]; then
spk_vec_dim=$[$(copy-vector --print-args=false "ark:cat $spk_vecs_dir/vecs.1|" ark,t:- | head -n 1 | wc -w) - 3];
! [ $spk_vec_dim -gt 0 ] && echo "Error getting spk-vec dim" && exit 1;
ext_lda_dim=$[$lda_dim + $spk_vec_dim]
extend-transform-dim --new-dimension=$ext_lda_dim $dir/lda.mat $dir/lda_ext.mat || exit 1;
lda_mat=$dir/lda_ext.mat
ext_feat_dim=$[$feat_dim + $spk_vec_dim]
else
spk_vec_dim=0
lda_mat=$dir/lda.mat
ext_lda_dim=$lda_dim
ext_feat_dim=$feat_dim
fi
stddev=`perl -e "print 1.0/sqrt($hidden_layer_dim);"`
cat >$dir/nnet.config <<EOF
SpliceComponent input-dim=$ext_feat_dim left-context=$splice_width right-context=$splice_width const-component-dim=$spk_vec_dim
FixedAffineComponent matrix=$lda_mat
AffineComponentPreconditioned input-dim=$ext_lda_dim output-dim=$hidden_layer_dim alpha=$alpha max-change=$max_change learning-rate=$initial_learning_rate param-stddev=$stddev bias-stddev=$bias_stddev
TanhComponent dim=$hidden_layer_dim
AffineComponentPreconditioned input-dim=$hidden_layer_dim output-dim=$num_leaves alpha=$alpha max-change=$max_change learning-rate=$initial_learning_rate param-stddev=0 bias-stddev=0
SoftmaxComponent dim=$num_leaves
EOF
# to hidden.config it will write the part of the config corresponding to a
# single hidden layer; we need this to add new layers.
cat >$dir/hidden.config <<EOF
AffineComponentPreconditioned input-dim=$hidden_layer_dim output-dim=$hidden_layer_dim alpha=$alpha max-change=$max_change learning-rate=$initial_learning_rate param-stddev=$stddev bias-stddev=$bias_stddev
TanhComponent dim=$hidden_layer_dim
EOF
$cmd $dir/log/nnet_init.log \
nnet-am-init $alidir/tree $lang/topo "nnet-init $dir/nnet.config -|" \
$dir/0.mdl || exit 1;
fi
if [ $stage -le -1 ]; then
echo "Training transition probabilities and setting priors"
$cmd $dir/log/train_trans.log \
nnet-train-transitions $dir/0.mdl "ark:gunzip -c $alidir/ali.*.gz|" $dir/0.mdl \
|| exit 1;
fi
num_iters_reduce=$[$num_epochs * $iters_per_epoch];
num_iters_extra=$[$num_epochs_extra * $iters_per_epoch];
num_iters=$[$num_iters_reduce+$num_iters_extra]
echo "$0: Will train for $num_epochs + $num_epochs_extra epochs, equalling "
echo "$0: $num_iters_reduce + $num_iters_extra = $num_iters iterations, "
echo "$0: (while reducing learning rate) + (with constant learning rate)."
# This is when we decide to mix up from: halfway between when we've finished
# adding the hidden layers and the end of training.
finish_add_layers_iter=$[($num_hidden_layers-$initial_num_hidden_layers+1)*$add_layers_period]
mix_up_iter=$[($num_iters + $finish_add_layers_iter)/2]
x=0
while [ $x -lt $num_iters ]; do
if [ $x -ge 0 ] && [ $stage -le $x ]; then
# Set off jobs doing some diagnostics, in the background.
$cmd $dir/log/compute_prob_valid.$x.log \
nnet-compute-prob $dir/$x.mdl ark:$egs_dir/valid_diagnostic.egs &
$cmd $dir/log/compute_prob_train.$x.log \
nnet-compute-prob $dir/$x.mdl ark:$egs_dir/train_diagnostic.egs &
if [ $x -gt 0 ] && [ ! -f $dir/log/mix_up.$[$x-1].log ]; then
$cmd $dir/log/progress.$x.log \
nnet-show-progress $dir/$[$x-1].mdl $dir/$x.mdl ark:$egs_dir/train_diagnostic.egs &
fi
echo "Training neural net (pass $x)"
if [ $x -gt 0 ] && \
[ $x -le $[($num_hidden_layers-1)*$add_layers_period] ] && \
[ $[($x-1) % $add_layers_period] -eq 0 ]; then
mdl="nnet-init --srand=$x $dir/hidden.config - | nnet-insert $dir/$x.mdl - - |"
else
mdl=$dir/$x.mdl
fi
$cmd $parallel_opts JOB=1:$num_jobs_nnet $dir/log/train.$x.JOB.log \
nnet-shuffle-egs --buffer-size=$shuffle_buffer_size --srand=$x \
ark:$egs_dir/egs.JOB.$[$x%$iters_per_epoch].ark ark:- \| \
nnet-train-parallel --num-threads=$num_threads \
--minibatch-size=$minibatch_size --srand=$x "$mdl" \
ark:- $dir/$[$x+1].JOB.mdl \
|| exit 1;
nnets_list=
for n in `seq 1 $num_jobs_nnet`; do
nnets_list="$nnets_list $dir/$[$x+1].$n.mdl"
done
learning_rate=`perl -e '($x,$n,$i,$f)=@ARGV; print ($x >= $n ? $f : $i*exp($x*log($f/$i)/$n));' $[$x+1] $num_iters_reduce $initial_learning_rate $final_learning_rate`;
softmax_learning_rate=`perl -e "print $learning_rate * $softmax_learning_rate_factor;"`;
nnet-am-info $dir/$[$x+1].1.mdl > $dir/foo 2>/dev/null || exit 1
nu=`cat $dir/foo | grep num-updatable-components | awk '{print $2}'`
na=`cat $dir/foo | grep -v Fixed | grep AffineComponent | wc -l`
# na is number of last updatable AffineComponent layer [one-based, counting only
# updatable components.]
lr_string="$learning_rate"
for n in `seq 2 $nu`; do
if [ $n -eq $na ] || [ $n -eq $[$na-1] ]; then lr=$softmax_learning_rate;
else lr=$learning_rate; fi
lr_string="$lr_string:$lr"
done
$cmd $dir/log/average.$x.log \
nnet-am-average $nnets_list - \| \
nnet-am-copy --learning-rates=$lr_string - $dir/$[$x+1].mdl || exit 1;
if $shrink && [ $[$x % $shrink_interval] -eq 0 ]; then
mb=$[($num_frames_shrink+$num_threads-1)/$num_threads]
$cmd $parallel_opts $dir/log/shrink.$x.log \
nnet-subset-egs --n=$num_frames_shrink --randomize-order=true --srand=$x \
ark:$egs_dir/train_diagnostic.egs ark:- \| \
nnet-combine-fast --num-threads=$num_threads --verbose=3 --minibatch-size=$mb \
$dir/$[$x+1].mdl ark:- $dir/$[$x+1].mdl || exit 1;
else
# On other iters, do nnet-am-fix which is much faster and has roughly
# the same effect.
nnet-am-fix $dir/$[$x+1].mdl $dir/$[$x+1].mdl 2>$dir/log/fix.$x.log
fi
if [ "$mix_up" -gt 0 ] && [ $x -eq $mix_up_iter ]; then
# mix up.
echo Mixing up from $num_leaves to $mix_up components
$cmd $dir/log/mix_up.$x.log \
nnet-am-mixup --min-count=10 --num-mixtures=$mix_up \
$dir/$[$x+1].mdl $dir/$[$x+1].mdl || exit 1;
fi
rm $nnets_list
fi
x=$[$x+1]
done
# Now do combination.
# At the end, final.mdl will be a combination of the last e.g. 10 models.
nnets_list=()
if [ $num_iters_final -gt $num_iters_extra ]; then
echo "Setting num_iters_final=$num_iters_extra"
fi
start=$[$num_iters-$num_iters_final+1]
for x in `seq $start $num_iters`; do
idx=$[$x-$start]
if [ $x -gt $mix_up_iter ]; then
nnets_list[$idx]=$dir/$x.mdl # "nnet-am-copy --remove-dropout=true $dir/$x.mdl - |"
fi
done
if [ $stage -le $num_iters ]; then
num_egs=`nnet-copy-egs ark:$egs_dir/combine.egs ark:/dev/null 2>&1 | tail -n 1 | awk '{print $NF}'`
mb=$[($num_egs+$num_threads-1)/$num_threads]
$cmd $parallel_opts $dir/log/combine.log \
nnet-combine-fast --num-threads=$num_threads --verbose=3 --minibatch-size=$mb \
"${nnets_list[@]}" ark:$egs_dir/combine.egs $dir/final.mdl || exit 1;
fi
# Compute the probability of the final, combined model with
# the same subset we used for the previous compute_probs, as the
# different subsets will lead to different probs.
$cmd $dir/log/compute_prob_valid.final.log \
nnet-compute-prob $dir/final.mdl ark:$egs_dir/valid_diagnostic.egs &
$cmd $dir/log/compute_prob_train.final.log \
nnet-compute-prob $dir/final.mdl ark:$egs_dir/train_diagnostic.egs &
sleep 2
echo Done
if $cleanup; then
echo Cleaning up data
if [ $egs_dir == "$dir/egs" ]; then
echo Removing training examples
rm $dir/egs/egs*
fi
echo Removing most of the models
for x in `seq 0 $num_iters`; do
if [ $[$x%10] -ne 0 ] && [ $x -lt $[$num_iters-$num_iters_final+1] ]; then
# delete all but every 10th model; don't delete the ones which combine to form the final model.
rm $dir/$x.mdl
fi
done
fi
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