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require File.join(File.dirname(__FILE__), '..', 'lib', 'ffi-rzmq')
if ARGV.length < 3
puts "usage: ruby local_lat.rb <connect-to> <message-size> <roundtrip-count>"
exit
end
link = ARGV[0]
message_size = ARGV[1].to_i
roundtrip_count = ARGV[2].to_i
def assert(rc)
raise "Last API call failed at #{caller(1)}" unless rc >= 0
end
begin
ctx = ZMQ::Context.new
s1 = ctx.socket(ZMQ::REQ)
s2 = ctx.socket(ZMQ::REP)
rescue ContextError => e
STDERR.puts "Failed to allocate context or socket!"
raise
end
assert(s1.setsockopt(ZMQ::LINGER, 100))
assert(s2.setsockopt(ZMQ::LINGER, 100))
assert(s1.connect(link))
assert(s2.bind(link))
poller = ZMQ::Poller.new
poller.register_readable(s2)
poller.register_readable(s1)
start_time = Time.now
# kick it off
message = ZMQ::Message.new("a" * message_size)
assert(s1.sendmsg(message, ZMQ::DONTWAIT))
i = roundtrip_count
until i.zero?
i -= 1
assert(poller.poll_nonblock)
poller.readables.each do |socket|
received_message = ''
assert(socket.recv_string(received_message, ZMQ::DONTWAIT))
assert(socket.sendmsg(ZMQ::Message.new(received_message), ZMQ::DONTWAIT))
end
end
elapsed_usecs = (Time.now.to_f - start_time.to_f) * 1_000_000
latency = elapsed_usecs / roundtrip_count / 2
puts "mean latency: %.3f [us]" % latency
puts "received all messages in %.3f seconds" % (elapsed_usecs / 1_000_000)
assert(s1.close)
assert(s2.close)
ctx.terminate
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