Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 27 Jan 2003 19:14:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 27 Jan 2003 19:14:23 -0500 Received: from holomorphy.com ([66.224.33.161]:30887 "EHLO holomorphy") by vger.kernel.org with ESMTP id ; Mon, 27 Jan 2003 19:14:23 -0500 Date: Mon, 27 Jan 2003 16:22:18 -0800 From: William Lee Irwin III To: "Martin J. Bligh" Cc: Andrew Morton , linux-kernel Subject: Re: kernbench-16 on 2.5.59 vs 2.5.59-mm6 Message-ID: <20030128002218.GE780@holomorphy.com> Mail-Followup-To: William Lee Irwin III , "Martin J. Bligh" , Andrew Morton , linux-kernel References: <375110000.1043689012@titus> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <375110000.1043689012@titus> User-Agent: Mutt/1.3.25i Organization: The Domain of Holomorphy Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 27, 2003 at 09:36:52AM -0800, Martin J. Bligh wrote: > 132 clear_page_tables > 131 pgd_ctor > -413 pgd_alloc The pagetable preconstruction cache hit is spread across clear_page_tables() and pgd_ctor() with the pgd_ctor patches. This is the equivalent of the explicit zeroing in pgd_alloc(). Your result appears to imply the overhead has been reduced by 36%, which is useful evidence for the PAE case. Before this the pgd_alloc() overhead had only been observed on non-PAE systems. Now, YTF hadn't I seen this before if all it took to bring it out was a kernel compile? Perhaps diffprof (I prefer the multiplicative flavor but nm that) of some flavor was lacking. -- wli - 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/