Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Subject: RE: OT: possible project/research project
Date: Wed, 20 Mar 2002 18:04:44 +1100
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Message-ID: <FC169E059D1A0442A04C40F86D9BA7600AFDC5@itdomain003.itdomain.net.au>
X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3
X-MS-Has-Attach: 
content-class: urn:content-classes:message
X-MS-TNEF-Correlator: 
From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: "Stephano Mariani" <sk DOT mail AT btinternet DOT com>,
   "Randall R Schulz" <rrschulz AT cris DOT com>, <cygwin AT cygwin DOT com>
Content-Transfer-Encoding: 8bit
X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id g2K77jA03835



> -----Original Message-----
> From: Stephano Mariani [mailto:sk DOT mail AT btinternet DOT com] 
> Sent: Wednesday, March 20, 2002 12:34 PM
> To: 'Randall R Schulz'; Robert Collins; cygwin AT cygwin DOT com
> Subject: RE: OT: possible project/research project
> 
> 
> I am no cygwin expert, or windows expert, but isn't the 
> effort better spent getting the cygwin fork/vfork to work faster?
> 
> Stephano Mariani
> 
> PS: Please do not fry me if this is a stupid suggestion or 
> not possible because of an obvious flaw, I simply fail to see 
> why the source of the problem is not being targeted.

Fry Fry!

Seriously though, reducing the overhead of fork() is a great idea. (BTW:
vfork is a different beast, it's ~ spawn() and that's OK.).
Unfortunately that requires kernel-level coding for NT, and/or kernel
level object modification to win9x on-the-fly. IOW it's going to be
unreliable for one and horribly complexify cygwin's innards for the
other (NT).

In fact cgf has had a copy-on-write fork() for cygwin in alpha-quality
IIRC. I'd love to do some perf tests with that, and in fact on my todo
list is cygwin profiling. Time however, is the killer.

Rob

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/