1 files changed, 123 insertions, 0 deletions
diff --git a/decoder/feed.rb b/decoder/feed.rb
new file mode 100755
index 00000000..4ac20730
--- /dev/null
+++ b/decoder/feed.rb
@@ -0,0 +1,123 @@
+#!/usr/bin/env ruby
+
+require 'trollop'
+require 'zipf'
+require 'nanomsg'
+require 'tempfile'
+
+conf = Trollop::options do
+  opt :conf,          "dtrain configuration",        :type => :string, :required => true, :short => '-c'
+  opt :input,         "input as bitext (f ||| e)",   :type => :string, :required => true, :short => '-i'
+  opt :slaves,        "number of parallel learners", :type => :int,    :default => 1,     :short => '-p'
+end
+
+dtrain_conf   = conf[:conf]
+input         = conf[:input]
+epochs        = conf[:epochs]
+learning_rate = conf[:learning_rate]
+num_slaves    = conf[:slaves]
+dtrain_dir    = File.expand_path File.dirname(__FILE__)
+
+if not conf[:dtrain_binary]
+  dtrain_bin = "#{dtrain_dir}/dtrain_net"
+else
+  dtrain_bin = conf[:dtrain_binary]
+end
+
+socks      = []
+slave_pids = []
+#port       = 60666 # last port = port+slaves
+#master_ip  = Socket.ip_address_list[0].ip_address
+
+`mkdir work`
+
+socks_files = []
+num_slaves.times { |i|
+  socks << NanoMsg::PairSocket.new
+  #addr = "tcp://#{master_ip}:#{port}"
+  socks_files << Tempfile.new('downpour')
+  url = "ipc://#{socks_files.last.path}"
+  socks.last.bind url
+  STDERR.write "listening on #{url}\n"
+  slave_pids << Kernel.fork {
+    `LD_LIBRARY_PATH=/scratch/simianer/downpour/nanomsg-0.5-beta/lib \
+      #{dtrain_bin} -c #{dtrain_conf} -a #{url} 2>work/out.#{i}`
+  }
+  #port += 1
+}
+
+threads = []
+socks.each_with_index { |n,i|
+  threads << Thread.new {
+    n.recv
+    STDERR.write "got hello from slave ##{i}\n"
+  }
+}
+threads.each { |thr| thr.join } # timeout?
+threads.clear
+
+inf = ReadFile.new input
+buf = []
+j = 0
+m = Mutex.new
+n = Mutex.new
+w = SparseVector.new
+ready = num_slaves.times.map { true }
+cma = 1
+epochs.times { |epoch|
+STDERR.write "---\nepoch #{epoch}\n"
+inf.rewind
+i = 0
+while true # round-robin
+  d = inf.gets
+  break if !d
+  d.strip!
+  while !ready[j]
+    j += 1
+    j = 0 if j==num_slaves
+  end
+  STDERR.write "sending source ##{i} to slave ##{j}\n"
+  socks[j].send d
+  n.synchronize {
+    ready[j] = false
+  }
+  threads << Thread.new {
+    me = j
+    moment = cma
+    update = SparseVector::from_kv socks[me].recv
+    STDERR.write "T update from slave ##{me}\n"
+    update *= learning_rate
+    update -= w
+    update /= moment
+    m.synchronize { w += update }
+    STDERR.write "T sending new weights to slave ##{me}\n"
+    socks[me].send w.to_kv
+    STDERR.write "T sent new weights to slave ##{me}\n"
+    n.synchronize {
+      ready[me] = true
+    }
+  }
+  sleep 1
+  i += 1
+  cma += 1
+  j += 1
+  j = 0 if j==num_slaves
+  threads.delete_if { |thr| !thr.status }
+end
+wf = WriteFile.new "weights.#{epoch}.gz"
+wf.write w.to_kv(" ", "\n")
+wf.close
+}
+
+threads.each { |thr| thr.join }
+
+socks.each { |n|
+  Thread.new {
+    n.send "shutdown"
+  }
+}
+
+slave_pids.each { |pid| Process.wait(pid) }
+
+socks_files.each { |f| f.unlink }
+