On Sun, 17 Nov 2002 12:23:06 +0100 Sven Panne wrote:
Nevertheless, you make a good point: Better support for "real" multi-threading is definitely an area where I'd like to see some improvement for the next non-patchlevel release of GHC. I'm still unconvinced that the current optional RTS support for mixed green/native threads is the right way to go. It looks to me like a workaround for poor OS support for really lightweight threads.
On Sun, Nov 17, 2002 at 11:33:44AM +0000, Duncan Coutts wrote:
Which of course has been improving greatly recently - on Linux at least. The 2.6 kernel will apparently have threading on par with Solaris. In fact, the next Linux pthreads library looks as though it will be based on a 1:1 model rather than a M:N model because it is simpler and (with the recent threading improvements) performs better. So that means that all of ghc's major platforms (Solaris, Linux, Win32) will have good OS thread support in the near future.
1:1 threading is inferior by virtue of resource scalability on 32-bit machines. This is not the final word. Bill