From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id 3C1056B003D for ; Thu, 5 Feb 2009 19:08:36 -0500 (EST) Message-ID: <498B7F7F.3090701@goop.org> Date: Thu, 05 Feb 2009 16:08:31 -0800 From: Jeremy Fitzhardinge MIME-Version: 1.0 Subject: Re: pud_bad vs pud_bad References: <498B2EBC.60700@goop.org> <20090205184355.GF5661@elte.hu> <498B35F9.601@goop.org> <20090205191017.GF20470@elte.hu> <498B4F1F.5070306@goop.org> <498B54A0.7040005@goop.org> <20090205215050.GB28097@elte.hu> <498B6325.1040401@goop.org> <20090205234241.GA14203@elte.hu> In-Reply-To: <20090205234241.GA14203@elte.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Ingo Molnar Cc: Hugh Dickins , William Lee Irwin III , Linux Kernel Mailing List , Linux Memory Management List List-ID: Ingo Molnar wrote: > just the act of using PAE was measured to cause multi-percent slowdown in > fork() and exec() latencies, etc. The pagetables are twice as large so is > that really surprising? > Is there a similar slowdown running the CPU in 32 vs 64 bit mode? Or does having more/wider registers mitigate it? J -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org