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#!/usr/bin/env ruby
# Automate benchmarking with ab with various concurrency levels.
require 'optparse'
options = {
:address => '0.0.0.0',
:port => 3000,
:requests => 1000,
:start => 1,
:end => 100,
:step => 10
}
OptionParser.new do |opts|
opts.banner = "Usage: #{$PROGRAM_NAME} [options]"
opts.on("-n", "--requests NUM", "Number of requests") { |num| options[:requests] = num }
opts.on("-a", "--address HOST", "Address (default: 0.0.0.0)") { |host| options[:address] = host }
opts.on("-p", "--port PORT", "use PORT (default: 3000)") { |port| options[:port] = port.to_i }
opts.on("-s", "--start N", "First concurrency level") { |n| options[:start] = n.to_i }
opts.on("-e", "--end N", "Last concurrency level") { |n| options[:end] = n.to_i }
opts.on("-S", "--step N", "Concurrency level step") { |n| options[:step] = n.to_i }
opts.on("-u", "--uri PATH", "Path to send to") { |u| options[:uri] = u }
opts.on("-k", "--keep-alive", "Use Keep-Alive") { options[:keep_alive] = true }
opts.on_tail("-h", "--help", "Show this message") { puts opts; exit }
end.parse!(ARGV)
puts 'request concurrency req/s failures'
puts '=' * 42
c = options[:start]
until c >= options[:end]
sleep 0.5
out = `nice -n20 ab #{'-k' if options[:keep_alive]} -c #{c} -n #{options[:requests]} #{options[:address]}:#{options[:port]}/#{options[:uri]} 2> /dev/null`
r = if requests = out.match(/^Requests.+?(\d+\.\d+)/)
requests[1].to_i
else
0
end
f = if requests = out.match(/^Failed requests.+?(\d+)/)
requests[1].to_i
else
0
end
puts "#{options[:requests].to_s.ljust(9)} #{c.to_s.ljust(13)} #{r.to_s.ljust(8)} #{f}"
c += options[:step]
end
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