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# frozen_string_literal: true
# Copyright, 2017, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require 'async/io'
require 'benchmark'
require 'open3'
# require 'ruby-prof'
RSpec.describe "c10k echo client/server", if: Process.respond_to?(:fork) do
# macOS has a rediculously hard time to do this.
# sudo sysctl -w net.inet.ip.portrange.first=10000
# sudo sysctl -w net.inet.ip.portrange.hifirst=10000
# Probably due to the use of select.
let(:repeats) do
if limit = Async::IO.file_descriptor_limit
if limit > 1024*10
10_000
else
[1, limit - 100].max
end
else
10_000
end
end
let(:server_address) {Async::IO::Address.tcp('0.0.0.0', 10101)}
def echo_server(server_address)
Async do |task|
connections = []
Async::IO::Socket.bind(server_address) do |server|
server.listen(Socket::SOMAXCONN)
while connections.size < repeats
peer, address = server.accept
connections << peer
end
end.wait
Console.logger.info("Releasing #{connections.size} connections...")
while connection = connections.pop
connection.write(".")
connection.close
end
end
end
def echo_client(server_address, data, responses)
Async do |task|
begin
Async::IO::Socket.connect(server_address) do |peer|
responses << peer.read(1)
end
rescue Errno::ECONNREFUSED, Errno::ECONNRESET, Errno::ETIMEDOUT, Errno::EADDRINUSE
Console.logger.warn(data, $!)
# If the connection was refused, it means the server probably can't accept connections any faster than it currently is, so we simply retry.
retry
end
end
end
def fork_server
pid = fork do
# profile = RubyProf::Profile.new(merge_fibers: true)
# profile.start
echo_server(server_address)
# ensure
# result = profile.stop
# printer = RubyProf::FlatPrinter.new(result)
# printer.print(STDOUT)
end
yield
ensure
Process.kill(:KILL, pid)
Process.wait(pid)
end
around(:each) do |example|
duration = Benchmark.realtime do
example.run
end
example.reporter.message "Handled #{repeats} connections in #{duration.round(2)}s: #{(repeats/duration).round(2)}req/s"
end
it "should wait until all clients are connected" do
fork_server do
# profile = RubyProf::Profile.new(merge_fibers: true)
# profile.start
Async do |task|
responses = []
tasks = repeats.times.map do |i|
# puts "Starting client #{i} on #{task}..." if (i % 1000) == 0
echo_client(server_address, "Hello World #{i}", responses)
end
# task.reactor.print_hierarchy
tasks.each(&:wait)
expect(responses.size).to be repeats
end
# ensure
# result = profile.stop
# printer = RubyProf::FlatPrinter.new(result)
# printer.print(STDOUT)
end
end
end
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