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|
require File.join(File.dirname(__FILE__), '..', 'lib', 'ffi-rzmq')
require 'thread'
# Within a single process, we start up five threads. Main thread has a PUB (publisher)
# socket and the secondary threads have SUB (subscription) sockets. We measure the
# *throughput* between these sockets. A high-water mark (HWM) is *not* set, so the
# publisher queue is free to grow to the size of memory without dropping packets.
#
# This example also illustrates how a single context can be shared amongst several
# threads. Sharing a single context also allows a user to specify the "inproc"
# transport in addition to "tcp" and "ipc".
#
# % ruby throughput_measurement.rb tcp://127.0.0.1:5555 1024 1_000_000
#
# % ruby throughput_measurement.rb inproc://lm_sock 1024 1_000_000
#
if ARGV.length < 3
puts "usage: ruby throughput_measurement.rb <connect-to> <message-size> <roundtrip-count>"
exit
end
link = ARGV[0]
message_size = ARGV[1].to_i
count = ARGV[2].to_i
def assert(rc)
raise "Last API call failed at #{caller(1)}" unless rc >= 0
end
begin
master_context = ZMQ::Context.new
rescue ContextError => e
STDERR.puts "Failed to allocate context or socket!"
raise
end
class Receiver
def initialize context, link, size, count, stats
@context = context
@link = link
@size = size
@count = count
@stats = stats
begin
@socket = @context.socket(ZMQ::SUB)
rescue ContextError => e
STDERR.puts "Failed to allocate SUB socket!"
raise
end
assert(@socket.setsockopt(ZMQ::LINGER, 100))
assert(@socket.setsockopt(ZMQ::SUBSCRIBE, ""))
assert(@socket.connect(@link))
end
def run
msg = ZMQ::Message.new
assert(@socket.recvmsg(msg))
elapsed = elapsed_microseconds do
(@count - 1).times do
assert(@socket.recvmsg(msg))
end
end
@stats.record_elapsed(elapsed)
assert(@socket.close)
end
def elapsed_microseconds(&blk)
start = Time.now
yield
((Time.now - start) * 1_000_000)
end
end
class Transmitter
def initialize context, link, size, count
@context = context
@link = link
@size = size
@count = count
begin
@socket = @context.socket(ZMQ::PUB)
rescue ContextError => e
STDERR.puts "Failed to allocate PUB socket!"
raise
end
assert(@socket.setsockopt(ZMQ::LINGER, 100))
assert(@socket.bind(@link))
end
def run
sleep 1
contents = "#{'0' * @size}"
i = 0
while i < @count
msg = ZMQ::Message.new(contents)
assert(@socket.sendmsg(msg))
i += 1
end
end
def close
assert(@socket.close)
end
end
class Stats
def initialize size, count
@size = size
@count = count
@mutex = Mutex.new
@elapsed = []
end
def record_elapsed(elapsed)
@mutex.synchronize do
@elapsed << elapsed
end
end
def output
@elapsed.each do |elapsed|
throughput = @count * 1000000 / elapsed
megabits = throughput * @size * 8 / 1000000
puts "message size: %i [B]" % @size
puts "message count: %i" % @count
puts "mean throughput: %i [msg/s]" % throughput
puts "mean throughput: %.3f [Mb/s]" % megabits
puts
end
end
end
threads = []
stats = Stats.new message_size, count
transmitter = Transmitter.new(master_context, link, message_size, count)
threads << Thread.new do
transmitter.run
end
1.times do
threads << Thread.new do
receiver = Receiver.new(master_context, link, message_size, count, stats)
receiver.run
end
end
threads.each {|t| t.join}
transmitter.close
stats.output
master_context.terminate
|
