Re: network programming with GHC 7

On Thu, Oct 28, 2010 at 2:16 AM, Kazu Yamamoto wrote:

When I compiled a network server with GHC 7 without the "-threaded" option and ran it, I got the following error.

file descriptor 5496824 out of range for select (0--1024).

I have read the paper "Scalable Event Handling for GHC" and understand that this new IO manger assumes the "-threaded" option.

The unthreaded runtime has a completely different I/O manager from the threaded one. We didn't touch the unthreaded runtime. Does your app work under earlier versions of GHC without -threaded?

Does this mean that we need the "-threaded" option to GHC 7 for networking programming and GHC 7 does not maintain backward compatibility?

No.