Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 10 Dec 2001 02:51:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 10 Dec 2001 02:51:34 -0500 Received: from bitmover.com ([192.132.92.2]:44962 "EHLO bitmover.bitmover.com") by vger.kernel.org with ESMTP id ; Mon, 10 Dec 2001 02:51:27 -0500 Date: Sun, 9 Dec 2001 23:51:26 -0800 From: Larry McVoy To: David Lang Cc: Larry McVoy , Stevie O , linux-kernel@vger.kernel.org Subject: Re: "Colo[u]rs" Message-ID: <20011209235126.J25754@work.bitmover.com> Mail-Followup-To: David Lang , Larry McVoy , Stevie O , linux-kernel@vger.kernel.org In-Reply-To: <20011209232859.I25754@work.bitmover.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: ; from david.lang@digitalinsight.com on Sun, Dec 09, 2001 at 11:21:23PM -0800 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Dec 09, 2001 at 11:21:23PM -0800, David Lang wrote: > Larry, I thought that direct mapped caches had full mapping from any cache > address to any physical address while the N-way mapped caches were more > limited. modern caches are N-way instead of direct mapped becouse it's > much more expensive (transistor count wise) for the direct mapped > approach. That's not correct unless they changed terminology without asking my permission :-) A direct mapped cache is the same as a 1-way set associative cache. It means each cache line has one and only one place it can be in the cache. It also means there is only one set of tag comparitors, which makes it cheaper and easier to build. > If I'm mistaken about my termonology (very possible :-) what is the term > for what I am refering to as direct mapped? Fully associative cache, I believe. -- --- Larry McVoy lm at bitmover.com http://www.bitmover.com/lm - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/