Class: Jkr::Blktrace

Inherits:
Object
  • Object
show all
Defined in:
lib/jkr/blktrace.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input_basename) ⇒ Blktrace

Returns a new instance of Blktrace.



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# File 'lib/jkr/blktrace.rb', line 14

def initialize(input_basename)
  input_basename = Pathname.new(input_basename).relative_path_from(Pathname.new(`pwd`.strip)).to_s
  if Dir.glob(input_basename + ".blktrace.*").size > 0
    @input_basename = input_basename
    puts "multi file: #{input_basename}"
  else
    if File.exists?(input_basename)
      @input_singlefile = input_basename
      puts "single file: #{input_basename}"
    else
      raise ArgumentError.new("No such blktrace data: #{input_basename}")
    end
  end
end

Class Method Details

.each(input_basename, &block) ⇒ Object 



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# File 'lib/jkr/blktrace.rb', line 9

def each(input_basename, &block)
  self.new(input_basename).each(&block)
end

.open(input_basename) ⇒ Object 



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# File 'lib/jkr/blktrace.rb', line 5

def open(input_basename)
  self.new(input_basename)
end

Instance Method Details

#each(option = {}, &block) ⇒ Object 



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# File 'lib/jkr/blktrace.rb', line 55

def each(option = {}, &block)
  self.map(option, &block)
  true
end

#map(option = {}, &block) ⇒ Object 



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# File 'lib/jkr/blktrace.rb', line 60

def map(option = {}, &block)
  if ! option.include?(:cache)
    option[:cache] = true
  end
  if option[:limit]
    limit = "| head -n #{option[:limit]}"
  else
    limit = ""
  end

  if @input_basename
    cache_file_path = @input_basename + ".cache"
  else
    cache_file_path = @input_singlefile + ".cache"
  end

  if option[:cache] && File.exists?(cache_file_path)
    records = Marshal.load(File.open(cache_file_path))
  else
    records = []
    issues = []
    if @input_basename
      cmd = "blkparse -f \"bt\\t%c\\t%s\\t%T.%t\\t%a\\t%d\\t%S\\t%n\\n\" -i #{@input_basename} #{limit} | grep '^bt'|sort -k4,4"
    elsif
      cmd = "cat #{@input_singlefile}|blkparse -f \"bt\\t%c\\t%s\\t%T.%t\\t%a\\t%d\\t%S\\t%n\\n\" -i - #{limit} | grep '^bt'|sort -k4,4"
    end
    IO.popen(cmd, "r") do |io|
      while line = io.gets
        _, cpu, seqno, time, action, rwbs, pos_sec, sz_sec = line.split("\t")
        cpu = cpu.to_i
        seqno = seqno.to_i
        time = time.to_f
        pos_sec = pos_sec.to_i
        sz_sec = sz_sec.to_i
        
        record = [cpu, seqno, time, action, rwbs, pos_sec, sz_sec]
        if action == "D"
          issues.push(record)
        elsif action == "C"
          # check pos and sz
          del_idx = nil
          issues.each_with_index do |rec, idx|
            if pos_sec == rec[5] && sz_sec == rec[6]
              del_idx = idx
              rt = time - rec[2]
              record.push(rt) # append response time
              records.push(record)
              break
            end
          end
          if del_idx.nil?
            puts("Unmatched complete record: #{record.inspect}")
            # raise StandardError.new("Unmatched complete record: #{record.inspect}")
            next
          end
          issues.delete_at(del_idx)
        else
          raise NotImplementedError.new("Action #{action} handler is not implemented.")
        end
      end
    end
    File.open(cache_file_path, "w") do |file|
      Marshal.dump(records, file)
    end
  end

  records.map do |*record|
    block.call(*record)
  end
end

#raw_each(option = {}, &block) ⇒ Object 



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# File 'lib/jkr/blktrace.rb', line 29

def raw_each(option = {}, &block)
  if option[:limit]
    limit = "| head -n #{option[:limit]}"
  else
    limit = ""
  end
  if @input_basename
    cmd = "blkparse -f \"bt\\t%c\\t%s\\t%T.%t\\t%a\\t%d\\t%S\\t%n\\n\" -i #{@input_basename} #{limit} | grep '^bt'|sort -k4,4"
  elsif @input_singlefile
    cmd = "cat #{@input_singlefile}|blkparse -f \"bt\\t%c\\t%s\\t%T.%t\\t%a\\t%d\\t%S\\t%n\\n\" -i - #{limit} | grep '^bt'|sort -k4,4"
  end
  IO.popen(cmd, "r") do |io|
    while line = io.gets
      _, cpu, seqno, time, action, rwbs, pos_sec, sz_sec = line.split("\t")
      cpu = cpu.to_i
      seqno = seqno.to_i
      time = time.to_f
      pos_sec = pos_sec.to_i
      sz_sec = sz_sec.to_i
      record = [cpu, seqno, time, action, rwbs, pos_sec, sz_sec]

      block.call(record)
    end
  end
end