From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail43-fra-R.bigfish.com (mail-fra.bigfish.com [62.209.45.166]) (using TLSv1 with cipher EDH-RSA-DES-CBC3-SHA (168/168 bits)) (Client CN "*.bigfish.com", Issuer "*.bigfish.com" (not verified)) by ozlabs.org (Postfix) with ESMTP id E812D67B70 for ; Thu, 24 Aug 2006 02:33:15 +1000 (EST) Message-ID: <44EC8338.3050203@am.sony.com> Date: Wed, 23 Aug 2006 09:32:56 -0700 From: Tim Bird MIME-Version: 1.0 To: Johannes Berg Subject: Re: BogoMIPS no longer supported on PowerPC? References: <1156329453.3914.13.camel@ux156> In-Reply-To: <1156329453.3914.13.camel@ux156> Content-Type: text/plain; charset=UTF-8 Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Johannes Berg wrote: > On Wed, 2006-08-23 at 18:25 +0800, Li Yang-r58472 wrote: > > I noticed a recent modification to __delay has changed from using empty > > loops to reading timebase. Thus, breaks the calculation of bogomips, > > and makes it terribly low. Is the bogomips no longer being supported on > > powerpc arch? > > What's there to be 'supported'? The only purpose of bogomips is > calibrating the delay loop, and that has changed now by using timebase, > hence bogomips no longer have a purpose. There was even a patch to > remove it from /proc/cpuinfo but I'm not sure whether that got applied > or not. I missed the patch for this, but I have a related question. What is the status of the calibration code now for PPC? Is it just skipped? I assume that the ability to set a preset loops_per_jiffy is no longer relevant? -- Tim ============================= Tim Bird Architecture Group Chair, CE Linux Forum Senior Staff Engineer, Sony Electronics =============================