From owner-freebsd-performance@FreeBSD.ORG Tue Sep 20 02:34:27 2005 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 31D6916A41F; Tue, 20 Sep 2005 02:34:27 +0000 (GMT) (envelope-from peter@wemm.org) Received: from canning.wemm.org (canning.wemm.org [192.203.228.65]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8948343D46; Tue, 20 Sep 2005 02:34:26 +0000 (GMT) (envelope-from peter@wemm.org) Received: from fw.wemm.org (canning.wemm.org [192.203.228.65]) by canning.wemm.org (Postfix) with ESMTP id 451E82A945; Mon, 19 Sep 2005 19:34:26 -0700 (PDT) (envelope-from peter@wemm.org) Received: from overcee.wemm.org (overcee.wemm.org [10.0.0.3]) by fw.wemm.org (Postfix) with ESMTP id B5935E2B3; Mon, 19 Sep 2005 19:34:25 -0700 (PDT) (envelope-from peter@wemm.org) Received: from overcee.wemm.org (localhost [127.0.0.1]) by overcee.wemm.org (8.13.4/8.13.4) with ESMTP id j8K2YPpF041974; Mon, 19 Sep 2005 19:34:25 -0700 (PDT) (envelope-from peter@wemm.org) Received: from localhost (localhost [[UNIX: localhost]]) by overcee.wemm.org (8.13.4/8.13.1/Submit) id j8K2YOhk041971; Mon, 19 Sep 2005 19:34:24 -0700 (PDT) (envelope-from peter@wemm.org) X-Authentication-Warning: overcee.wemm.org: peter set sender to peter@wemm.org using -f From: Peter Wemm To: freebsd-arch@freebsd.org Date: Mon, 19 Sep 2005 19:34:23 -0700 User-Agent: KMail/1.8.1 References: <1127101042.788.30.camel@spirit> <20050919094234.GG40237@cirb503493.alcatel.com.au> In-Reply-To: <20050919094234.GG40237@cirb503493.alcatel.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200509191934.23991.peter@wemm.org> X-Mailman-Approved-At: Tue, 20 Sep 2005 05:22:20 +0000 Cc: Peter Jeremy , freebsd-performance@freebsd.org, Xin LI Subject: Re: Combine more operation within one system call: to do it, or not to do it? X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Sep 2005 02:34:27 -0000 On Monday 19 September 2005 02:42 am, Peter Jeremy wrote: > On Mon, 2005-Sep-19 11:37:22 +0800, Xin LI wrote: > >It seems that Microsoft has recently revised several of their APIs. > > I think this is a regular occurence as part of their ongoing efforts > to minimise backward and forward compatibility. > > > One example is their ConnectEx(), as found in documentation [1]. > > Does this represent a measurable improvement in a real-world > situation? The other consideration is that our syscalls are generally pretty quick on most of our platforms. We don't normally context switch for a syscall - well, we save and restore registers, but that isn't too bad compared to the i386 tss and ldt etc switches for process context switches. -- Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com "All of this is for nothing if we don't go to the stars" - JMS/B5