From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 12 Dec 2002 15:20:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 12 Dec 2002 15:20:27 -0500 Received: from mark.mielke.cc ([216.209.85.42]:39180 "EHLO mark.mielke.cc") by vger.kernel.org with ESMTP id ; Thu, 12 Dec 2002 15:20:26 -0500 Date: Thu, 12 Dec 2002 15:36:46 -0500 From: Mark Mielke To: Terje Eggestad Cc: "H. Peter Anvin" , linux-kernel , Dave Jones Subject: Re: Intel P6 vs P7 system call performance Message-ID: <20021212203646.GA14228@mark.mielke.cc> References: <1039610907.25187.190.camel@pc-16.office.scali.no> <3DF78911.5090107@zytor.com> <1039686176.25186.195.camel@pc-16.office.scali.no> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1039686176.25186.195.camel@pc-16.office.scali.no> User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 12, 2002 at 10:42:56AM +0100, Terje Eggestad wrote: > On ons, 2002-12-11 at 19:50, H. Peter Anvin wrote: > > Terje Eggestad wrote: > > > PS: rdtsc on P4 is also painfully slow!!! > > Now that's just braindead... > It takes about 11 cycles on athlon, 34 on PII, and a whooping 84 on P4. > For a simple op like that, even 11 is a lot... Really makes you wonder. Some of this discussion is a little bit unfair. My understanding of what Intel has done with the P4, is create an architecture that allows for higher clock rates. Sure the P4 might take 84, vs PII 34, but how many PII 2.4 Ghz machines have you ever seen on the market? Certainly, some of their decisions seem to be a little odd on the surface. That doesn't mean the situation is black and white. mark -- mark@mielke.cc/markm@ncf.ca/markm@nortelnetworks.com __________________________ . . _ ._ . . .__ . . ._. .__ . . . .__ | Neighbourhood Coder |\/| |_| |_| |/ |_ |\/| | |_ | |/ |_ | | | | | | \ | \ |__ . | | .|. |__ |__ | \ |__ | Ottawa, Ontario, Canada One ring to rule them all, one ring to find them, one ring to bring them all and in the darkness bind them... http://mark.mielke.cc/