Class: AutoPerf

Inherits:
Object
  • Object
show all
Defined in:
lib/autograph/autoperf.rb

Constant Summary collapse

COLUMN_NAMES = 
['rate', 'conn/s', 'req/s', 'replies/s avg', 'errors', 'net io (KB/s)', 'reply time']

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ AutoPerf

Returns a new instance of AutoPerf.



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# File 'lib/autograph/autoperf.rb', line 4

def initialize(opts = {})
  conf = Configuration.new(opts)

  if conf['use_test_data']
    reports = load_test_data(conf)
  else
    reports = run_tests(conf)
  end

  graphs = generate_graphs(reports, conf)
  HtmlReport.new(reports, graphs, conf)
end

Instance Method Details

#benchmark(conf) ⇒ Object 



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# File 'lib/autograph/autoperf.rb', line 35

def benchmark(conf)
  raise "You must specify a host." if conf['host'].nil?
  httperf_opt = conf.keys.grep(/httperf/).collect {|k| "--#{k.gsub(/httperf_/, '')} #{conf[k]}"}.join(" ")
  httperf_cmd = "httperf --hog --server #{conf['host']} --port #{conf['port']} #{httperf_opt}"

  res = Hash.new("")
  IO.popen("#{httperf_cmd} 2>&1") do |pipe|
    puts "\n#{httperf_cmd}"

    while((line = pipe.gets))
      res['output'] += line

      case line
      when /^Total: .*replies (\d+)/ then res['replies'] = $1
      when /^Connection rate: (\d+\.\d)/ then res['conn/s'] = $1
      when /^Request rate: (\d+\.\d)/ then res['req/s'] = $1
      when /^Reply time .* response (\d+\.\d)/ then res['reply time'] = $1
      when /^Net I\/O: (\d+\.\d)/ then res['net io (KB/s)'] = $1
      when /^Errors: total (\d+)/ then res['errors'] = $1
      when /^Reply rate .*min (\d+\.\d) avg (\d+\.\d) max (\d+\.\d) stddev (\d+\.\d)/ then
        res['replies/s min'] = $1
        res['replies/s avg'] = $2
        res['replies/s max'] = $3
        res['replies/s stddev'] = $4
      end
    end
  end

  return res
end

#generate_graphs(reports, configuration) ⇒ Object 



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# File 'lib/autograph/autoperf.rb', line 17

def generate_graphs(reports, configuration)
  graphs = {}
  graphs[:request_rate]     = Graph.new(:title => "Demanded vs. Achieved Request Rate (r/s)")
  graphs[:response_time]    = Graph.new(:title => "Demanded Request Rate (r/s) vs. Response Time")
  graphs[:max_request_rate] = Graph.new(:title => "Maximum Achieved Request Rate")

  reports.each do |uri, report|
    graphs[:request_rate].series  << GraphSeries.new(report.column('rate'), report.column('conn/s').map{|x| x.to_f}, "Request rate for '#{uri}'", uri)
    graphs[:response_time].series << GraphSeries.new(report.column('rate'), report.column('reply time'), "Response time for '#{uri}'", uri)
  end

  reports.keys.each_with_index do |key, index|
    graphs[:max_request_rate].series << GraphSeries.new([index], [reports[key].max('conn/s')], "Max Request Rate for '#{key}'")
  end

  graphs
end

#load_test_data(configuration) ⇒ Object 



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# File 'lib/autograph/autoperf.rb', line 90

def load_test_data(configuration)
  reports = {}
  configuration['host'] = "127.0.0.1"
  configuration['uris'] = ['/', '/page1', '/page2']
  configuration['uris'].each do |uri|
    reports[uri] = Table.new(COLUMN_NAMES)
    times = [130.7, 132.7, 180.4, 438.3, 591.9, 686.9, 739.4, 661.3, 727.1, 546.5, 711.1, 893.7, 870.0]
    conns = [5.0, 21.5, 28.8, 30.6, 26.3, 24.7, 23.0, 25.8, 28.0, 27.4, 27.9, 22.2, 22.7]
    1.upto(10) do |i|
      reports[uri] << {'rate' => i*10 - 10,
                       'errors' => 0,
                       'conn/s' => conns[((i + rand * 10) % conns.length).to_i],
                       'req/s' => 0,
                       'replies/s avg' => 0,
                       'net io (KB/s)' => 100,
                       'reply time' => times[((i + rand * 10) % times.length).to_i]}
    end
  end
  reports
end

#run_tests(configuration) ⇒ Object 



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# File 'lib/autograph/autoperf.rb', line 82

def run_tests(configuration)
  reports = {}
  configuration['uris'].uniq.each do |uri|
    reports[uri] = vary_rate(uri, configuration)
  end
  reports
end

#vary_rate(uri, configuration) ⇒ Object 



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# File 'lib/autograph/autoperf.rb', line 66

def vary_rate(uri, configuration)
  puts "Config is #{configuration.inspect}" if configuration['verbose']
  results = {}
  report = Table.new(COLUMN_NAMES)

  (configuration['low_rate']..configuration['high_rate']).step(configuration['rate_step']) do |rate|
    results[rate] = benchmark(configuration.merge({'httperf_rate' => rate, 'httperf_uri' => "'#{uri}'"}))
    report << results[rate].merge({'rate' => rate})

    puts report.to_s
    puts results[rate]['output'] if results[rate]['errors'].to_i > 0
  end

  report
end