Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753488AbYJWPk1 (ORCPT ); Thu, 23 Oct 2008 11:40:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751318AbYJWPkR (ORCPT ); Thu, 23 Oct 2008 11:40:17 -0400 Received: from home.keithp.com ([63.227.221.253]:35853 "EHLO keithp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751254AbYJWPkP (ORCPT ); Thu, 23 Oct 2008 11:40:15 -0400 Subject: Re: io resources and cached mappings (was: [git pull] drm patches for 2.6.27-rc1) From: Keith Packard To: Ingo Molnar Cc: keithp@keithp.com, Jesse Barnes , Nick Piggin , Dave Airlie , Yinghai Lu , Linux Kernel Mailing List In-Reply-To: <20081023080553.GB14714@elte.hu> References: <20081022093615.GF12453@elte.hu> <1224746087-13991-1-git-send-email-keithp@keithp.com> <20081023080553.GB14714@elte.hu> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-R3CLetumsXip3hkEuVhi" Date: Thu, 23 Oct 2008 08:39:10 -0700 Message-Id: <1224776350.6738.14.camel@koto.keithp.com> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1064 Lines: 36 --=-R3CLetumsXip3hkEuVhi Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Thu, 2008-10-23 at 10:05 +0200, Ingo Molnar wrote: > Any ballpark-figure numbers you can share with us? For one quake-3 based game we use for performance regression checking, 64-bit kernels run about 18 times faster now. That's the difference between using a zero-cost dynamic mapping and using ioremap_wc for each page. --=20 keith.packard@intel.com --=-R3CLetumsXip3hkEuVhi Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iD8DBQBJAJqeQp8BWwlsTdMRAojIAKDGaETafs78wW6WgrR7CDUOUzLspACeIzF2 jYhYDxDrPYpZZx+1d6OtJKs= =zEkl -----END PGP SIGNATURE----- --=-R3CLetumsXip3hkEuVhi-- -- 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/