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#
# Copyright (c) 2007-2009 FastMQ Inc.
#
# This file is part of 0MQ.
#
# 0MQ is free software; you can redistribute it and/or modify it under
# the terms of the Lesser GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# 0MQ is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# Lesser GNU General Public License for more details.
#
# You should have received a copy of the Lesser GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
require 'librbzmq'
class AssertionFailure < StandardError
end
def assert(bool, message = 'assertion failure')
raise AssertionFailure.new(message) unless bool
end
if ARGV.length != 4
puts "usage: local_lat <in-interface> <out-interface> <message-size>
<roundtrip-count>"
Process.exit
end
in_interface = ARGV[0]
out_interface = ARGV[1]
message_size = ARGV[2]
roundtrip_count = ARGV[3]
# Print out the test parameters.
puts "message size: #{message_size} [B]"
puts "roundtrip count: #{roundtrip_count}"
# Create 0MQ transport.
rb_zmq = Zmq.new()
# Create the wiring.
context = rb_zmq.context(1,1)
in_socket = rb_zmq.socket(context, ZMQ_SUB)
out_socket = rb_zmq.socket(context, ZMQ_PUB)
# Bind.
rb_zmq.bind(in_socket, in_interface.to_s)
rb_zmq.bind(out_socket, out_interface.to_s)
# Create message data to send.
out_msg = rb_zmq.msg_init_size(message_size.to_i)
# Get initial timestamp.
start_time = Time.now
# The message loop.
for i in 0...roundtrip_count.to_i do
rb_zmq.send(out_socket, out_msg, ZMQ_NOBLOCK)
in_buf = rb_zmq.recv(in_socket, ZMQ_NOBLOCK)
assert(rb_zmq.msg_size(in_buf.msg) == message_size.to_i)
end
# Get final timestamp.
end_time = Time.now
# Compute and print out the latency.
latency = (end_time.to_f - start_time.to_f) *1000000 /
roundtrip_count.to_i / 2
puts "Your average latency is " + "%0.2f" % latency + "[us]"
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