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From: Gaurav.Jain_at_[hidden]
Date: 2007-05-02 08:48:41


Christopher Kohlhoff <chris <at>> writes:

> I'm sure I've outlined this in another email somewhere, but I can't
> it right now. Anyway, the basic idea is as follows:
> - Create an io_service for each CPU.
> - Create an io_service::work object for each io_service to keep it
> running when it would otherwise have nothing else to do.
> - Spawn a thread for each io_service to call io_service::run().

> - Create a tcp::acceptor on one of the io_services.
> - Create your tcp::socket objects on any of the io_services, using
> sort of load balancing scheme to choose the io_service to use (e.g.
> round robin).
> - Ensure that all communication between io_services uses message
> passing, i.e. use io_service::post().
> The core of the work would probably happen in a handle_accept
> function(), e.g. using the Daytime.3 tutorial program as a starting
> point:
> void start_accept()
> {
> // ------> Load balance here <------
> tcp_connection::pointer new_connection =
> tcp_connection::create(choose_io_service());
> acceptor_.async_accept(new_connection->socket(),
> boost::bind(&tcp_server::handle_accept, this, new_connection,
> asio::placeholders::error));
> }
> void handle_accept(tcp_connection::pointer new_connection,
> const asio::error_code& error)
> {
> if (!error)
> {
> // ------> Use message passing here <------
> new_connection->socket().io_service().post(
> boost::bind(&tcp_connection::start, new_connection));
> start_accept();
> }
> }

Chris in one of your replies I get to know that to achieve the above one
can use a pool of io service object. Could you explain a bit about this?
What is this io service::work object. How I can use thread pool in
achieving the above? What should I have in my worker object structure of
the thread pool?


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