1 files changed, 79 insertions, 0 deletions
diff --git a/dtrain/parallelize.rb b/dtrain/parallelize.rb
new file mode 100755
index 00000000..1d277ff6
--- /dev/null
+++ b/dtrain/parallelize.rb
@@ -0,0 +1,79 @@
+#!/usr/bin/env ruby
+
+
+if ARGV.size != 5
+  STDERR.write "Usage: "
+  STDERR.write "ruby parallelize.rb <#shards> <input> <refs> <epochs> <dtrain.ini>\n"
+  exit
+end
+
+dtrain_bin = '/home/pks/bin/dtrain_local'
+ruby       = '/usr/bin/ruby'
+lplp_rb    = '/home/pks/mt/cdec-dtrain/dtrain/hstreaming/lplp.rb'
+lplp_args  = 'l2 select_k 100000'
+gzip       = '/bin/gzip'
+
+num_shards = ARGV[0].to_i
+input      = ARGV[1]
+refs       = ARGV[2]
+epochs     = ARGV[3].to_i
+ini        = ARGV[4]
+
+
+`mkdir work`
+
+def make_shards(input, refs, num_shards)
+  lc = `wc -l #{input}`.split.first.to_i
+  shard_sz = lc / num_shards
+  leftover = lc % num_shards
+  in_f = File.new input, 'r'
+  refs_f = File.new refs, 'r'
+  shard_in_files = []
+  shard_refs_files = []
+  0.upto(num_shards-1) { |shard|
+    shard_in = File.new "work/shard.#{shard}.in", 'w+'
+    shard_refs = File.new "work/shard.#{shard}.refs", 'w+'
+    0.upto(shard_sz-1) { |i|
+      shard_in.write in_f.gets
+      shard_refs.write refs_f.gets
+    }
+    shard_in_files << shard_in
+    shard_refs_files << shard_refs
+  }
+  while leftover > 0
+    shard_in_files[-1].write in_f.gets
+    shard_refs_files[-1].write refs_f.gets
+    leftover -= 1
+  end
+  (shard_in_files + shard_refs_files).each do |f| f.close end
+  in_f.close
+  refs_f.close
+end
+
+make_shards input, refs, num_shards
+
+0.upto(epochs-1) { |epoch|
+  pids = []
+  input_weights = ''
+  if epoch > 0 then input_weights = "--input_weights work/weights.#{epoch-1}" end
+  weights_files = []
+  0.upto(num_shards-1) { |shard|
+    pids << Kernel.fork {
+      `#{dtrain_bin} -c #{ini}\
+        --input work/shard.#{shard}.in\
+        --refs work/shard.#{shard}.refs #{input_weights}\
+        --output work/weights.#{shard}.#{epoch}\
+        &> work/out.#{shard}.#{epoch}`
+    }
+    weights_files << "work/weights.#{shard}.#{epoch}"
+  }
+  pids.each { |pid| Process.wait(pid) }
+  cat = File.new('work/weights_cat', 'w+')
+  weights_files.each { |f| cat.write File.new(f, 'r').read }
+  cat.close
+  `#{ruby} #{lplp_rb} #{lplp_args} #{num_shards} < work/weights_cat &> work/weights.#{epoch}`
+}
+
+`rm work/weights_cat`
+`#{gzip} work/*`
+