From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Delivered-To: caml-list@yquem.inria.fr Received: from concorde.inria.fr (concorde.inria.fr [192.93.2.39]) by yquem.inria.fr (Postfix) with ESMTP id 3CB27BCAE for ; Wed, 6 Jul 2005 21:19:03 +0200 (CEST) Received: from pauillac.inria.fr (pauillac.inria.fr [128.93.11.35]) by concorde.inria.fr (8.13.0/8.13.0) with ESMTP id j66JJ2wU015163 for ; Wed, 6 Jul 2005 21:19:02 +0200 Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id VAA32203 for ; Wed, 6 Jul 2005 21:19:02 +0200 (MET DST) Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.202]) by nez-perce.inria.fr (8.13.0/8.13.0) with ESMTP id j66JJ1Ca028615 for ; Wed, 6 Jul 2005 21:19:02 +0200 Received: by wproxy.gmail.com with SMTP id i32so23366wra for ; Wed, 06 Jul 2005 12:19:01 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:user-agent:x-accept-language:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=WUA9LYXCS/rGIsMY5ktfZmTNYY5vdkk7NHNDILHAcb373PeHu9HQNC+2BO+NPJbtEo+Sg3FclpFaFtSb0xr0m8LIcpcM8kcWFpVF/3NjHKZgtJ0/lGcJHNDuNXDxlxiz2vfwQ9sezvwrUeCCymT9pwjyYpOJhxgmPtyEDpdNMXQ= Received: by 10.54.33.65 with SMTP id g65mr52039wrg; Wed, 06 Jul 2005 12:19:01 -0700 (PDT) Received: from ?80.4.70.111? ([80.4.70.111]) by mx.gmail.com with ESMTP id 9sm123546wrl.2005.07.06.12.19.00; Wed, 06 Jul 2005 12:19:01 -0700 (PDT) Message-ID: <42CC2EA2.6020906@gmail.com> Date: Wed, 06 Jul 2005 20:18:58 +0100 From: Christopher Campbell User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050404) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Jon Harrop Cc: Caml-list Subject: Re: [Caml-list] x86 vs AMD64 OCaml compiler performance References: <200507060353.29648.jon@ffconsultancy.com> <42CC11E8.8040505@rftp.com> <200507061831.51964.jon@ffconsultancy.com> In-Reply-To: <200507061831.51964.jon@ffconsultancy.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Miltered: at concorde with ID 42CC2EA6.001 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Miltered: at nez-perce with ID 42CC2EA5.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Spam: no; 0.01; caml-list:01 ocaml:01 compiler:01 byte:01 compilation:01 compilation:01 byte:01 vastly:01 ...:98 1800:98 heatsink:98 airflow:98 3200:98 winchester:98 6600:98 X-Spam-Checker-Version: SpamAssassin 3.0.2 (2004-11-16) on yquem.inria.fr X-Spam-Status: No, score=0.0 required=5.0 tests=RCVD_BY_IP autolearn=disabled version=3.0.2 X-Spam-Level: Jon Harrop wrote: > On Wednesday 06 July 2005 18:16, you wrote: > >>Jon Harrop wrote: >> >>>I just timed recompilation of my latest project to both byte code and >>>native code on both 900MHz Athlon t-bird and 800MHz Athlon64. To my >>>suprise, compilation to native code takes roughly the same amount of time >>>on both computers but compilation to byte code is slightly faster (1m18 >>>vs 1m40) on x86 but vastly faster (21s vs 1m50) on AMD64. >> >>Ummm... do you mean "1800MHz" or "1.8GHz" for the Athlon64? :) > > > No, I got that bit right - 800MHz (downclocked for the muggy summer). Running > at 1.8GHz it compiles in 9s but overheats and switches off after a few > minutes, especially when the GPU is working like a Trojan. You probably have, but I'll ask anyway. Have you checked the heatsink is seated properly and the case has suitable airflow? I have a Athlon64 3200 (Winchester) with a 6600GT in a room with a combi boiler in the cupboard and it's always bloomin' hot in here but the system never crashes and dies. Mind you, it has a smaller cache and I don't live in Cambridge (unfortunately I live in damp dreach Glasgow).