From owner-freebsd-arch  Tue Feb  5 14:40:16 2002
Delivered-To: freebsd-arch@freebsd.org
Received: from rwcrmhc53.attbi.com (rwcrmhc53.attbi.com [204.127.198.39])
	by hub.freebsd.org (Postfix) with ESMTP
	id 7E09437B419; Tue,  5 Feb 2002 14:40:08 -0800 (PST)
Received: from InterJet.elischer.org ([12.232.206.8])
          by rwcrmhc53.attbi.com
          (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP
          id <20020205224008.YFRY10199.rwcrmhc53.attbi.com@InterJet.elischer.org>;
          Tue, 5 Feb 2002 22:40:08 +0000
Received: from localhost (localhost.elischer.org [127.0.0.1])
	by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id OAA87480;
	Tue, 5 Feb 2002 14:36:58 -0800 (PST)
Date: Tue, 5 Feb 2002 14:36:57 -0800 (PST)
From: Julian Elischer <julian@elischer.org>
To: Daniel Eischen <eischen@pcnet1.pcnet.com>
Cc: Matthew Dillon <dillon@apollo.backplane.com>,
	Dan Eischen <eischen@vigrid.com>, bde@FreeBSD.ORG, peter@FreeBSD.ORG,
	arch@FreeBSD.ORG
Subject: Re: getsetcontext system call
In-Reply-To: <Pine.GSO.4.10.10202051728380.28698-100000@pcnet1.pcnet.com>
Message-ID: <Pine.BSF.4.21.0202051433380.87080-100000@InterJet.elischer.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-arch@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-arch.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-arch>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-arch>
X-Loop: FreeBSD.ORG



On Tue, 5 Feb 2002, Daniel Eischen wrote:

> On Tue, 5 Feb 2002, Julian Elischer wrote:
> > On Tue, 5 Feb 2002, Daniel Eischen wrote:
> > 
> > > On Tue, 5 Feb 2002, Matthew Dillon wrote:
> > > >     I thought we were trying to avoid having to make any system calls on
> > > >     a userland thread context switch.
> > > 
> > > In the threads library, we'll use our own library routines to
> > > do this (hopefully) without having to make a system call.
> > 
> > Or maybe use kernel entries that are already hapenning anyway.....
> 
> Huh?
> 


I was thinking that when saving thread context back to userland
after completing a syscall but before going on to another
syscall, we can save lots of FP state etc as well.

Maybe I'm confused on the topic of conversation.

> -- 
> Dan Eischen
> 
> 


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-arch" in the body of the message