On Sat, Dec 5, 2009 at 16:44, Armin Rigo <arigo@tunes.org> wrote:
Hi,
On Fri, Dec 04, 2009 at 06:18:13PM +0100, Antonio Cuni wrote:
I agree that at this point in time we cannot or don't want to make annotation/rtyping/backend parallelizable, but it should definitely be possible to just pass the -j flag to 'make' in an automatic way.
Of course, that is full of open problems too. The main one is that each gcc process consumes potentially a lot of RAM, so just passing "-j" is not a great idea, as all gccs are started in parallel. It looks like some obscure tweak is needed, like setting -j to a number that depends not only on the number of CPUs (as is classically done) but also on the total RAM of the system...
My 2 cents: for C++ I would be really worried, but for C I'd guess that even with 4 CPUs (i.e. classically 5 jobs) one is not going to go over 1Gb... or not? Dear Sven-Hendrik, would you verify this idea by launching make by hand, as suggested? (Now, I'm going back to just lurking). Regards -- Paolo Giarrusso