Date: Mon, 7 Nov 2011 10:15:44 +0100 From: Joerg Sonnenberger <joerg@britannica.bec.de> To: freebsd-hackers@freebsd.org Subject: Re: reducing compiler instances during buildkernel Message-ID: <20111107091544.GB9484@britannica.bec.de> In-Reply-To: <20111107074624.GB91353@server.vk2pj.dyndns.org> References: <20111105223021.GA52651@freebsd.org> <20111107074624.GB91353@server.vk2pj.dyndns.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, Nov 07, 2011 at 06:46:24PM +1100, Peter Jeremy wrote: > On 2011-Nov-05 22:30:21 +0000, Alexander Best <arundel@freebsd.org> wrote: > >wouldn't it be possible to somehow spawn N gcc or clang instances > >(make -jN buildkernel) and then pipe the src to one of those N instances? > >just like with something like multics N processes were started and then people > >used the job control language to load binaries into those processes. > > This is likely to require very non-trivial changes to gcc or clang. > The major issue is that the process needs to be in a known initial > state before beginning a compile - and it's very unlikely that the > compiler cleans itself up enough to return to that state. Actually, the real problem is that a full cleanup is likely to be as expensive as fork+exec. Joerg
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20111107091544.GB9484>