Class: RWB::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/rwb.rb,
lib/rwb/report.rb,
lib/rwb/warmup.rb,
lib/rwb/results.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(urls, max_runs = 100, max_threads = 10) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/rwb.rb', line 61

def initialize(urls, max_runs=100, max_threads=10)
  @urls = urls
  @max_runs = max_runs
  @max_threads = max_threads
  @results_mean = nil
  @results_std_dev = nil
  @sla_levels = [0.5, 0.9]
  @http = Net::HTTP
  @new_results = RunResults.new
end

Instance Attribute Details

#sla_levels ⇒ Object

Returns the value of attribute sla_levels.



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# File 'lib/rwb.rb', line 59

def sla_levels
  @sla_levels
end

Instance Method Details

#add_proxy(proxy_addr, proxy_port = 80, proxy_user = nil, proxy_pass = nil) ⇒ Object 



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# File 'lib/rwb.rb', line 72

def add_proxy(proxy_addr, proxy_port = 80, proxy_user = nil, 
              proxy_pass = nil)
  @http = Net::HTTP::Proxy(proxy_addr, proxy_port, proxy_user,
                           proxy_pass)
end

#adjust_scale(scale, max) ⇒ Object 



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# File 'lib/rwb/results.rb', line 110

def adjust_scale(scale, max)
  if scale/2 > max
    scale = scale/2
    scale = adjust_scale(scale, max)
  end
  scale
end

#get_times(results, levels) ⇒ Object 



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# File 'lib/rwb/report.rb', line 70

def get_times(results, levels)
  times = Array.new
  times.push(make_milli(results[0]))
  levels.each do |num|
    times.push(make_milli(results[(results.length*num - 1).round]))
  end
  unless times.last == make_milli(results.last)
    times.push(make_milli(results.last))
  end
  times
end

#graph_quartiles_overall ⇒ Object 



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# File 'lib/rwb/report.rb', line 39

def graph_quartiles_overall
  results = @new_results.times_by_url
  puts results_quartile(results.sort)
end

#graph_quartiles_urls(scale = nil) ⇒ Object 



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# File 'lib/rwb/report.rb', line 31

def graph_quartiles_urls(scale = nil)
  @urls.urls.keys.sort.each do |key|
    url = @urls.urls[key].to_base
    results = @new_results.times_by_url(url)
    puts "#{url}:\n\t" + results_quartile(results.sort, scale)
  end
end

#make_milli(num) ⇒ Object 



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# File 'lib/rwb/report.rb', line 82

def make_milli(num)
  (num * 1000).to_i
end

#print_times(results, levels) ⇒ Object 



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# File 'lib/rwb/report.rb', line 60

def print_times(results, levels)
  times = get_times(results, levels)
  puts  "\tShortest time:\t#{times.shift} msecs"
  levels.each_with_index do |num, index|
    percent = num.to_f * 100.0
    puts "\t#{percent}%ile time:\t#{times[index]} msecs"
  end
  puts  "\tLongest time:\t#{times[-1]} msecs"
end

#rand_warmup(num_requests) ⇒ Object 



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# File 'lib/rwb/warmup.rb', line 18

def rand_warmup(num_requests)
  $stderr.puts "warming up with #{num_requests} requests"
  checkpoint = num_requests/10
  for run in 1..num_requests
    if run % checkpoint == 0
      $stderr.print "#{run} "
    end
    url = URI.parse(@urls.get_url.to_url)
    @http.start(url.host, url.port) do |http|
      http.request( Net::HTTP::Get.new(url) )
    end
  end
  $stderr.puts
end

#report_by_time(sla_levels = @sla_levels, granularity = 0.2) ⇒ Object 



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# File 'lib/rwb/report.rb', line 44

def report_by_time(sla_levels = @sla_levels, granularity = 0.2)
  start = 0.0
  stop = granularity
  results = @new_results.times_by_url
  puts "Results by time:"
  while stop <= 1.0
    first = (results.length * start).to_i
    last = (results.length * stop).to_i
    these_results = results.slice(first..last)
    puts "results for requests #{first} - #{last}"
    print_times(these_results.sort, sla_levels)
    start = stop
    stop += granularity
  end
end

#report_full(sla_levels = @sla_levels) ⇒ Object 



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# File 'lib/rwb/report.rb', line 4

def report_full(sla_levels = @sla_levels)
  report_header
  report_overall(sla_levels)
  report_urls(sla_levels)
  report_by_time(sla_levels)
end

#report_header ⇒ Object 



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# File 'lib/rwb/report.rb', line 86

def report_header
print <<EOF
Concurrency Level:       #{@max_threads}
Total Requests:          #{@max_runs}
Total time for testing:  #{@total_time} secs
Requests per second:     #{@max_runs/@total_time}
Mean time per request:   #{results_mean}  msecs
Standard deviation:      #{results_std_dev}
EOF
end

#report_overall(sla_levels = @sla_levels) ⇒ Object 



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# File 'lib/rwb/report.rb', line 11

def report_overall(sla_levels = @sla_levels)
  results = @new_results.times_by_url
  
  puts "Overall results:"
  print_times(results.sort, sla_levels)
end

#report_urls(sla_levels = @sla_levels) ⇒ Object 



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# File 'lib/rwb/report.rb', line 18

def report_urls(sla_levels = @sla_levels)
  @urls.urls.keys.sort.each do |key|
    url = @urls.urls[key].to_base
    results = @new_results.times_by_url(url)
    puts "Results for #{url}:"
    if results.length > 0
      print_times(results.sort, sla_levels)
    else
      puts "no results for url"
    end
  end
end

#results_mean ⇒ Object 



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# File 'lib/rwb/results.rb', line 84

def results_mean
  if @results_mean
    return @results_mean
  end
  @results_mean = @new_results.times_by_url.inject(0) do |sum, time|
    sum += time
  end
  @results_mean = @results_mean/@new_results.times_by_url.length
  make_milli(@results_mean)
end

#results_quartile(times, scale = nil) ⇒ Object 



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# File 'lib/rwb/results.rb', line 118

def results_quartile(times, scale = nil)
  times = times.map { |t| make_milli(t) }
  size = results_mean + results_std_dev * 2
  min = times[0]
  first  = times[(times.length*0.25).to_int - 1]
  second = times[(times.length*0.5).to_int - 1]
  third  = times[(times.length*0.75).to_int - 1]
  max = times[-1]
  
  len = max.to_s.length
  unless scale
    scale = (max/((10**len).to_f)).ceil * (10**len)
    scale = adjust_scale(scale, max)
  end
  step = scale/50
  step = 1 if step == 0
  scale = 50 if scale < 50
  line = Array.new
  char = ' '
  for i in 0..49 do
    case i
    when max/step
      line[i] = ']'
    when third/step
      line[i] = '|'
      char = ' '
    when second/step
      line[i] = '+'
    when first/step
      line[i] = '|'
      char = '-'
    when min/step
      line[i] = '['
    when 0
      line[i] = ':'
    when 49
      line[i] = ':'
    else
      line[i] = char
    end
  end
  return '0' + line.join('')  + scale.to_s
end

#results_std_dev ⇒ Object 



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# File 'lib/rwb/results.rb', line 95

def results_std_dev
  if @results_std_dev
    return @results_std_dev
  end
  unless @results_mean
    results_mean
  end
  @results_std_dev = @new_results.times_by_url.inject(0) do |std_dev, time|
    std_dev += (time - @results_mean) ** 2
  end
  @results_std_dev = 
    Math.sqrt(@results_std_dev/@new_results.times_by_url.length)
  make_milli(@results_std_dev)
end

#run ⇒ Object 



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# File 'lib/rwb.rb', line 78

def run
  threads = []
  @steps = []
  0.step(@max_runs, @max_runs/10) {|i| @steps.push(i) }
  @requests = (1..@max_runs).to_a
  total_start_time = Time.now
  for t in 1..@max_threads
    threads << Thread.new { run_thread }
  end
  threads.each { |th| th.join }
  total_stop_time = Time.now
  @total_time = total_stop_time - total_start_time
end

#run_test(id) ⇒ Object 



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# File 'lib/rwb.rb', line 101

def run_test(id)
  request = @urls.get_url
#      url = URI.parse request.to_url
  base = request.to_base
  time = nil
  response_code = nil
  
#      @http.start(url.host, url.port) do |http|
#        start_time = Time.now
#        response = http.request( Net::HTTP::Get.new(url) )
#        stop_time = Time.now
#        time = stop_time - start_time
#        response_code = response.code
#      end

  start_time = Time.now
  begin
    open(request.to_url) do |page|
      stop_time = Time.now
      time = stop_time - start_time
      response_code = page.status
    end
  rescue
    stop_time = Time.now
    time = stop_time - start_time
    response_code = 404
  end
  
  
  result = Result.new(id, Time.now, base, time, response_code)
  
  @new_results.add_result(result)
end

#run_thread ⇒ Object 



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# File 'lib/rwb.rb', line 92

def run_thread
  while req_num = @requests.shift
    run_test(req_num-1)
    if @steps.include?(req_num)
      puts "completed #{req_num} runs"
    end
  end
end

#spec_warmup(urls, num_runs = 1) ⇒ Object 



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# File 'lib/rwb/warmup.rb', line 33

def spec_warmup(urls, num_runs=1)
  $stderr.puts "warming up with #{num_runs} runs"
  for run in 1..num_runs
    $stderr.print "#{run} "
    urls.each do |url|
      url = URI.parse(url)
      @http.start(url.host, url.port) do |http|
        http.request( Net::HTTP::Get.new(url) )
      end
    end
  end
  $stderr.puts
end

#warmup(num_runs = 1) ⇒ Object 



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# File 'lib/rwb/warmup.rb', line 4

def warmup(num_runs = 1)
  $stderr.puts "warming up with #{num_runs} runs"
  for run in 1..num_runs
    $stderr.print "#{run} "
    @urls.urls.values.each do |url|
      url = URI.parse(url.to_url)
      @http.start(url.host, url.port) do |http|
        http.request( Net::HTTP::Get.new(url) )
      end
    end
  end
  $stderr.puts
end