client.cc

#include <msgpack/rpc/client.h>
#include <stdlib.h>
#include <sys/time.h>

int main(int argc, char* argv[])
{
	int num = atoi(argv[1]);

	msgpack::rpc::client c("127.0.0.1", 19701);
	c.start(4);

	struct timeval start_time;
	gettimeofday(&start_time, NULL);

	num -= 1;
	for(int i=0; i < num; ++i) {
		c.notify("check");
	}
	c.call("check").join();

	struct timeval end_time;
	gettimeofday(&end_time, NULL);

	double time = (end_time.tv_sec - start_time.tv_sec)
		+ (double)(end_time.tv_usec - start_time.tv_usec) / 1000 / 1000;

	std::cout << num/time << std::endl;
}

client.rb

require 'rubygems'
require 'msgpack/rpc'

num = ARGV[0].to_i
c = MessagePack::RPC::Client.new('127.0.0.1', 19701)

start = Time.now
(num-1).times do
  c.notify(:check)
end
c.call(:check)  # added
finish = Time.now

p num / (finish - start)

result-cc.txt

$ g++ -Wall -g -lmsgpack -lmsgpack-rpc -lmpio server.cc -o server
$ g++ -Wall -g -lmsgpack -lmsgpack-rpc -lmpio client.cc -o client
$ ./server &
$ ./client 100000
166137

# MacBook Pro 2.53 GHz Intel Core 2 Duo
# Mac OS X 10.6.4

result-rb.txt

$ ruby server.rb &
$ ruby client.rb 100000
158192.8053912108
$ ruby --version
ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]

# MacBook Pro 2.53 GHz Intel Core 2 Duo
# Mac OS X 10.6.4

server.cc

#include <msgpack/rpc/server.h>

class myserver : public msgpack::rpc::dispatcher {
	void dispatch(msgpack::rpc::request req)
	{
		req.result_nil();
	}
};

int main(void)
{
	msgpack::rpc::server svr;

	std::auto_ptr<msgpack::rpc::dispatcher> dp(new myserver);
	svr.serve(dp.get());

	svr.listen("0.0.0.0", 19701);

	svr.run(4);
}

server.rb

require 'rubygems'
require 'msgpack/rpc'

class MyServer
  def check
    nil
  end
end

svr = MessagePack::RPC::Server.new
svr.listen('0.0.0.0', 19701, MyServer.new)
svr.run