Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750901AbXACRq1 (ORCPT ); Wed, 3 Jan 2007 12:46:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750982AbXACRq1 (ORCPT ); Wed, 3 Jan 2007 12:46:27 -0500 Received: from omx1-ext.sgi.com ([192.48.179.11]:53511 "EHLO omx1.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750901AbXACRq0 (ORCPT ); Wed, 3 Jan 2007 12:46:26 -0500 Date: Wed, 3 Jan 2007 09:46:19 -0800 (PST) From: Christoph Lameter To: Helge Deller cc: linux-kernel@vger.kernel.org, parisc-linux@lists.parisc-linux.org Subject: Re: [RFC][PATCH] use cycle_t instead of u64 in struct time_interpolator In-Reply-To: <200701022233.25697.deller@gmx.de> Message-ID: References: <200701022233.25697.deller@gmx.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 832 Lines: 16 On Tue, 2 Jan 2007, Helge Deller wrote: > As far as I could see, this patch does not change anything for the > existing architectures which use this framework (IA64 and SPARC64), > since "cycles_t" is defined there as unsigned 64bit-integer anyway > (which then makes this patch a no-change for them). The 64bit nature of some entities was so far necessary to get the proper accuracy of interpolation. Maybe it can be made to work with 32 bit entities. The macro GET_TI_SECS must work correctly and the less bits are specified in shift the less self-tuning accuracy you will get. - 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/