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#!/usr/bin/env ruby
require 'trollop'
require 'zipf'
conf = Trollop::options do
opt :conf, "dtrain configuration", :type => :string, :short => '-c'
opt :input, "input as bitext (f ||| e)", :type => :string, :short => '-i'
opt :epochs, "number of epochs", :type => :int, :default => 10
opt :randomize, "randomize shards once", :type => :bool, :default => false, :short => '-z'
opt :reshard, "randomize after each epoch", :type => :bool, :default => false, :short => '-y'
opt :shards, "number of shards", :type => :int, :short => '-s'
opt :weights, "input weights for first epoch", :type => :string, :default => '', :short => '-w'
opt :lplp_args, "arguments for lplp.rb", :type => :string, :default => "l2 select_k 100000", :short => '-l'
opt :per_shard_decoder_configs, "give custom decoder config per shard", :type => :string, :short => '-o'
opt :processes_at_once, "jobs to run at oce", :type => :int, :default => 9999, :short => '-p'
opt :qsub, "use qsub", :type => :bool, :default => false, :short => '-q'
opt :qsub_args, "extra args for qsub", :type => :string, :default => "h_vmem=5G", :short => 'r'
opt :dtrain_binary, "path to dtrain binary", :type => :string, :short => '-d'
end
dtrain_dir = File.expand_path File.dirname(__FILE__)
if not conf[:dtrain_binary]
dtrain_bin = "#{dtrain_dir}/dtrain"
else
dtrain_bin = conf[:dtrain_binary]
end
lplp_rb = "#{dtrain_dir}/lplp.rb"
lplp_args = conf[:lplp_args]
dtrain_conf = conf[:conf]
epochs = conf[:epochs]
rand = conf[:randomize]
reshard = conf[:reshard]
predefined_shards = false
per_shard_decoder_configs = false
if conf[:shards] == 0
predefined_shards = true
num_shards = 0
per_shard_decoder_configs = true if conf[:per_shard_decoder_configs]
else
num_shards = conf[:shards]
end
input = conf[:input]
use_qsub = conf[:qsub]
shards_at_once = conf[:processes_at_once]
first_input_weights = conf[:weights]
`mkdir work`
def make_shards input, num_shards, epoch, rand
lc = `wc -l #{input}`.split.first.to_i
index = (0..lc-1).to_a
index.reverse!
index.shuffle! if rand
shard_sz = (lc / num_shards.to_f).round 0
leftover = lc - (num_shards*shard_sz)
leftover = [0, leftover].max
in_f = File.new input, 'r'
in_lines = in_f.readlines
shard_in_files = []
in_fns = []
real_num_shards = 0
0.upto(num_shards-1) { |shard|
break if index.size==0
real_num_shards += 1
in_fn = "work/shard.#{shard}.#{epoch}"
shard_in = File.new in_fn, 'w+'
in_fns << in_fn
0.upto(shard_sz-1) { |i|
j = index.pop
break if !j
shard_in.write in_lines[j]
}
shard_in_files << shard_in
}
while leftover > 0
j = index.pop
shard_in_files[-1].write in_lines[j]
leftover -= 1
end
shard_in_files.each do |f| f.close end
in_f.close
return in_fns, real_num_shards
end
input_files = []
if predefined_shards
input_files = File.new(input).readlines.map { |i| i.strip }
if per_shard_decoder_configs
decoder_configs = ReadFile.readlines_strip(conf[:per_shard_decoder_configs]
).map { |i| i.strip }
end
num_shards = input_files.size
else
input_files, num_shards = make_shards input, num_shards, 0, rand
end
0.upto(epochs-1) { |epoch|
puts "epoch #{epoch+1}"
pids = []
input_weights = ''
input_weights = "--input_weights work/weights.#{epoch-1}" if epoch>0
weights_files = []
shard = 0
remaining_shards = num_shards
while remaining_shards > 0
shards_at_once.times {
break if remaining_shards==0
qsub_str_start = qsub_str_end = local_end = ''
if use_qsub
qsub_str_start = "qsub -l #{conf[:qsub_args]} -cwd -sync y -b y -j y\
-o work/out.#{shard}.#{epoch}\
-N dtrain.#{shard}.#{epoch} \""
qsub_str_end = "\""
local_end = ''
else
local_end = "2>work/out.#{shard}.#{epoch}"
end
if per_shard_decoder_configs
cdec_conf = "--decoder_conf #{decoder_configs[shard]}"
else
cdec_conf = ""
end
if first_input_weights != '' && epoch == 0
input_weights = "--input_weights #{first_input_weights}"
end
pids << Kernel.fork {
`#{qsub_str_start}#{dtrain_bin} -c #{dtrain_conf} #{cdec_conf}\
#{input_weights}\
--bitext #{input_files[shard]}\
--output work/weights.#{shard}.#{epoch}#{qsub_str_end} #{local_end}`
}
weights_files << "work/weights.#{shard}.#{epoch}"
shard += 1
remaining_shards -= 1
}
pids.each { |pid| Process.wait(pid) }
pids.clear
end
`cat work/weights.*.#{epoch} > work/weights_cat`
`ruby #{lplp_rb} #{lplp_args} #{num_shards} < work/weights_cat\
> work/weights.#{epoch}`
if rand and reshard and epoch+1!=epochs
input_files, num_shards = make_shards input, num_shards, epoch+1, rand
end
}
`rm work/weights_cat`
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