Class: Pwrake::GraphGroup

Inherits:
Object
  • Object
show all
Defined in:
lib/pwrake/misc/mcgp.rb

Instance Method Summary collapse

Constructor Details

#initialize(loc_list, weight_list, vertex_depth, grviz) ⇒ GraphGroup

Returns a new instance of GraphGroup.



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# File 'lib/pwrake/misc/mcgp.rb', line 176

def initialize(loc_list, weight_list, vertex_depth, grviz)
  if loc_list.size != weight_list.size
    raise ArgumentError, "array size mismatch"
  end
  @n_part = loc_list.size
  a = [loc_list, weight_list].transpose
  a.sort_by!{|x| x[1]}
  b = a.transpose
  @loc_list = b[0]
  @tpwgts = normalize(b[1])

  b = @tpwgts[0]
  a = @tpwgts[-1]-b
  if a/b > 1e-3
    @host_wgts = @tpwgts.map{|x| (((x-b)/a*0.45+1)*1000).to_i}
  else
    @host_wgts = @tpwgts.map{|x| 1000}
  end

  @vertex_name2id = {}
  @vertex_id2name = []
  @edges = []
  @file_sizes = []
  @loc_files = {}
  @count = 0

  @vertex_depth = vertex_depth
  @grviz = grviz

  @loc_list.each do |loc|
    push_vertex(loc)
    @vertex_depth[loc] = 0
  end
end

Instance Method Details

#average(a) ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 171

def average(a)
  s = summation(a).to_f
  (a.empty?) ? nil : s/a.size
end

#count_partition ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 370

def count_partition
  locs = Array.new(@n_part,nil)
  @n_part.times do |i|
    i_part = @part[i]
    locs[i_part] ||= []
    locs[i_part] << @vertex_id2name[i]
  end
  # p locs
  sum = []
  @vertex_id2name.each_with_index do |name,idx|
    y = @vertex_depth[name]
    x = @part[idx]
    sum[y] ||= Array.new(@n_part,0)
    sum[y][x] += 1
  end
  s = "partition count: \n"
  s += sum.each_with_index.map do |row,idx|
    " d=#{idx} "+row.inspect
  end.join("\n")
  #puts s
  Log.info s
  Log.info "@part[0:#{@n_part-1}]=#{@part[0...@n_part].inspect}"
  sum[0].each{|i| raise RuntimeError,"Unequal partitioning" if i!=1}
end

#count_partition2(part) ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 396

def count_partition2(part)
  sum = Array.new(0,0)
  part.each do |x|
    sum[x] ||= 0
    sum[x] += 1
  end
  s = sum.each_with_index.map do |x,i|
    "#{i}:#{x}"
  end
  puts "n_nodes=[ "+s.join(", ")+" ]"
  puts "@part[0:#{@n_part-1}]=#{part[0...@n_part].inspect}"
end

#make_loc_list ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 409

def make_loc_list
  rest = []
  loc_list = []
  @n_part.times do |i|
    i_part = @part[i]
    loc = @loc_list[i]
    if loc_list[i_part]
      rest << loc
    else
      loc_list[i_part] = loc
    end
  end
  @n_part.times do |i|
    unless loc_list[i]
      loc_list[i] = rest.pop
    end
  end
  loc_list
end

#normalize(a) ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 166

def normalize(a)
  s = summation(a).to_f
  (s==0) ? a : a.map{|x| x/s}
end

#part_graph ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 244

def part_graph
  @xadj = [0]
  @adjcny = []
  @adjwgt = []
  @vwgt = []

  depth_hist = []
  @vertex_id2name.each do |name|
    depth = @vertex_depth[name]
    # puts "name=#{name}, depth=#{depth}"
    depth_hist[depth] = (depth_hist[depth] || 0) + 1
  end

  map_depth = []
  ubv = []
  c = 0
  depth_hist.each do |x|
    if x and x>=@n_part
      map_depth << c
      c += 1
      ubv << 1 + 0.5*@n_part/x
      #ubv << ((x >= @n_part) ? 1.05 : 1.5)
    else
      map_depth << nil
    end
  end
  ubv[0] = 1.0005

  Pwrake::Log.info "loc_list=#{@loc_list}"
  Pwrake::Log.info "partition_weights=#{@tpwgts}"
  Pwrake::Log.info "ncon=#{c}"
  Pwrake::Log.info "depth_hist=#{depth_hist.inspect}"
  Pwrake::Log.info "ubvec=#{ubv.inspect}"

  if @file_sizes.empty?
    @edge_weight = 1
  else
    @edge_weight = average(@file_sizes).to_i*3
  end
  Pwrake::Log.info "default_edge_weight=#{@edge_weight}"

  @vertex_id2name.size.times do |i|
    if edg = @edges[i]
      edg.sort_by!{|x| x[0]}
      @adjcny.concat(edg.map{|x| x[0]})
      @adjwgt.concat(edg.map{|x| x[1] || @edge_weight})
      # @adjwgt.concat(edg.map{|x| x[1] ? 0 : @edge_weight})
    end
    @xadj.push(@adjcny.size)
  end

  @vertex_id2name.each_with_index do |name,i|
    w = Array.new(c,0)
    if i < @n_part
      w[0] = @host_wgts[i]
      # puts "name=#{name}, w=#{w.inspect}"
    else
      depth = @vertex_depth[name]
      if depth and (j = map_depth[depth])
        w[j] = 1
      end
    end
    @vwgt.concat(w)
  end

  #  puts "@vertex_id2name[#{i}]=#{@vertex_id2name[i]}, depth=#{depth}, edges="+@edges[i].map{|x| @vertex_id2name[x[0]]}.join("|")

  t1 = Pwrake.clock
  if false
    puts "@vertex_id2name.size=#{@vertex_id2name.size}"
    if $debug2
      @vertex_id2name.each_with_index{|x,i|
        puts "#{i} #{x} #{@edges[i].inspect}"
      }
    end
    puts "@edges.size=#{@edges.size}"
    puts "ncon=#{c}"
    puts "@n_part=#{@n_part}"
    puts "@xadj.size=#{@xadj.size}"
    puts "@adjcny.size/2=#{@adjcny.size/2}"
    puts "@adjwgt.size/2=#{@adjwgt.size/2}"
    puts "@vwgt.size=#{@vwgt.size}"
    puts "@vwgt.size/ncon=#{@vwgt.size/c}"
    puts "depth_hist=#{depth_hist.inspect}"
    puts "ubv=#{ubv.inspect}"
    if $debug
      puts "@xadj=#{@xadj.inspect}"
      puts "@adjcny=#{@adjcny.inspect}"
      puts "@adjwgt=#{@adjwgt.inspect}"
      puts "@vwgt=#{@vwgt.inspect}"
    end
    #exit
  end
  if defined? RbMetis
    hw = normalize(@host_wgts)
    tpw = []
    s = "tpwgts=[\n"
    @tpwgts.each_with_index do |x,i|
      a = [hw[i]]+[x]*(c-1)
      tpw.concat(a)
      s += " ["+a.map{|x|"%.5f"%x}.join(", ")+"]\n"
    end
    s += "]"
    Log.info s
    options = RbMetis.default_options
    options[RbMetis::OPTION_NCUTS] = 30
    options[RbMetis::OPTION_NSEPS] = 30
    options[RbMetis::OPTION_NITER] = 10
    @part = RbMetis.part_graph_recursive(
              @xadj, @adjcny, @n_part,
              ncon:c, vwgt:@vwgt, adjwgt:@adjwgt,
              tpwgts:tpw, ubvec:ubv, options:options)
  else
    puts "tpw=#{tpw.inspect}"
    @part = Metis.mc_part_graph_recursive2(
              c,@xadj,@adjcny,@vwgt,nil,@tpwgts)
  end
  t2 = Pwrake.clock
  Pwrake::Log.info "Time for Graph Partitioning: #{t2-t1} sec"
  count_partition
  if $debug
    puts "Time for Graph Partitioning: #{t2-t1} sec"
    p @part
  end
end

#push_edge(name, target, weight) ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 232

def push_edge(name, target, weight)
  if target and (weight.nil? or weight>0)
    push_vertex(name)
    push_vertex(target)
    v1 = @vertex_name2id[name]
    v2 = @vertex_name2id[target]
    (@edges[v1] ||= []).push [v2, weight]
    (@edges[v2] ||= []).push [v1, weight]
    @grviz.push_edge(name, target) if @grviz
  end
end

#push_loc_edge(locs, name, target, fsz) ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 211

def push_loc_edge(locs, name, target, fsz)
  locs.each do |loc|
    if @loc_list.include?(loc)
      push_edge(loc, target, fsz)
      @loc_files[loc] ||= []
      @loc_files[loc] << name
    end
  end
  @file_sizes << fsz
  #p [object_id,target,fsz]
end

#push_vertex(name) ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 223

def push_vertex(name)
  if !@vertex_name2id.has_key?(name)
    @vertex_name2id[name] = @count
    @vertex_id2name[@count] = name
    @grviz.push_vertex(name) if @grviz
    @count += 1
  end
end

#set_group ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 430

def set_group
  loc_list = make_loc_list()
  @vertex_id2name.each_with_index do |name,idx|
    if idx >= @n_part
      i_part = @part[idx]
      tw = Rake.application[name].wrapper
      tw.group_id = loc_list[i_part]
      #puts "task=#{task.inspect}, i_part=#{i_part}, host=#{host}"
    end
  end
  @loc_files.each do |gid,files|
    files.each do |f|
      tw = Rake.application[f].wrapper
      tw.group_id = gid
      # puts "gid=#{gid}, task=#{f}"
    end
  end
end

#set_node ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 450

def set_node
  loc_list = make_loc_list()
  @vertex_id2name.each_with_index do |name,idx|
    if idx >= @n_part
      i_part = @part[idx]
      tw = Rake.application[name].wrapper
      host = loc_list[i_part]
      tw.suggest_location = [host]
      #puts "task=#{task.inspect}, i_part=#{i_part}, host=#{host}"
    end
  end
end

#summation(a) ⇒ Object 



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# File 'lib/pwrake/misc/mcgp.rb', line 160

def summation(a)
  s = 0
  a.each{|x| s+=x}
  s
end