Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 30 Mar 2003 14:33:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 30 Mar 2003 14:32:47 -0500 Received: from [195.39.17.254] ([195.39.17.254]:17924 "EHLO Elf.ucw.cz") by vger.kernel.org with ESMTP id ; Sun, 30 Mar 2003 14:31:54 -0500 Date: Sun, 30 Mar 2003 19:23:06 +0200 From: Pavel Machek To: "Filipau, Ihar" Cc: "'linux-kernel@vger.kernel.org'" Subject: Re: inw/outw performance Message-ID: <20030330172306.GA6666@zaurus.ucw.cz> References: <7A5D4FEED80CD61192F2001083FC1CF9065148@CHARLY> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7A5D4FEED80CD61192F2001083FC1CF9065148@CHARLY> User-Agent: Mutt/1.3.27i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 603 Lines: 17 Hi! > And actually what I have found that on my development P3/1GHz system > every inw() takes more that 3us. I wasn't measuring outw() yet - but > I do not expect its timing to be better. inw/outw *is* slow. Memory map your registers to speed it up. -- Pavel Written on sharp zaurus, because my Velo1 broke. If you have Velo you don't need... - 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/