Re: [RFD] Combined fork-exec syscall.

From: dean gaudet <dean-list-linux-kernel@arctic.org>
To: Mark Grosberg <mark@nolab.conman.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFD] Combined fork-exec syscall.
Date: Sun, 27 Apr 2003 18:35:41 -0700 (PDT)	[thread overview]
Message-ID: <Pine.LNX.4.53.0304271831250.8792@twinlark.arctic.org> (raw)
In-Reply-To: <Pine.BSO.4.44.0304272036360.23296-100000@kwalitee.nolab.conman.org>

On Sun, 27 Apr 2003, Mark Grosberg wrote:

> I would think on large, multi-user systems that are spawning processes all
> day, this might improve performance if the shells on such a system were
> patched.

more relevant is a large multithreaded (or async model with many
connections per thread/process) webserver spawning cgi.  otherwise you pay
the costs of duplicating the mm and even if you use F_CLOEXEC (which has a
cost-per-connection) you have to pay for scanning the open fds.

if you look at such webservers they tend to have a separate process just
for the purpose of spawning cgi/etc. and use some IPC to pass the data to
the cgi spawner.

-dean