mpstat -P ALLから%usrだけを抜き出すやつ

filer_mpstat_usr

#!/usr/bin/env ruby

@current = []
@header = false

def init(time, all)
  @current << time
  @current << all
end

def append(usr)
  @current << usr
end

def flush
  @current.compact!

  if @current.length > 0
    unless @header
      puts (%w(time all) + (@current.length - 2).times.to_a).join("\t")
      @header = true
    end

    puts @current.join("\t")
  end

  @current.clear
end

STDIN.each do |line|
  if line.empty? || line.start_with?("Linux")
    next
  else
    time, core, usr, _ = line.split(/ +/, 4)
    if core == "CPU"
      flush
    elsif core == "all"
      init(time, usr)
    else
      append(usr)
    end
  end
end

flush