Re: [boost] Asio multithreaded server

From: Christopher Kohlhoff (chris_at_[hidden])
Date: 2006-11-16 07:00:44

berserker_r <berserker_r_at_[hidden]> wrote:
> Christopher Kohlhoff wrote:
> > What OS are you using? Is the session's work CPU bound?
>
> I'm on Windows XP,

Great, that confirmed what I suspected was the cause of the
problem.

> sry but I can't understand what you mean with the second
> question...

"CPU bound" means that the thing that the code doesn't perform
any blocking I/O or other operation that might cause the thread
to sleep for a time.

Anyway, I have just committed a fix to CVS head for this. If you
want to patch your own copy with a temporary fix, make the
following change to asio/detail/win_iocp_io_service.hpp:

   // Constructor.
   win_iocp_io_service(asio::io_service& io_service)
     : asio::io_service::service(io_service),
-      iocp_(::CreateIoCompletionPort(INVALID_HANDLE_VALUE, 0, 0, 0)),
+      iocp_(::CreateIoCompletionPort(INVALID_HANDLE_VALUE, 0, 0, ~0)),
       outstanding_work_(0),
       interrupted_(0),
       shutdown_(0)

Cheers,
Chris