Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758257AbYAPD5R (ORCPT ); Tue, 15 Jan 2008 22:57:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757294AbYAPD5I (ORCPT ); Tue, 15 Jan 2008 22:57:08 -0500 Received: from turing-police.cc.vt.edu ([128.173.14.107]:51526 "EHLO turing-police.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756935AbYAPD5F (ORCPT ); Tue, 15 Jan 2008 22:57:05 -0500 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: Shaohua Li Cc: lkml , linux-pci , Greg KH , "Pallipadi, Venkatesh" , "Kok, Auke" Subject: Re: [PATCH]PCIE ASPM support - takes 2 In-Reply-To: Your message of "Tue, 15 Jan 2008 13:02:26 +0800." <1200373346.20739.4.camel@sli10-desk.sh.intel.com> From: Valdis.Kletnieks@vt.edu References: <1200373346.20739.4.camel@sli10-desk.sh.intel.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1200455812_2966P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Tue, 15 Jan 2008 22:56:52 -0500 Message-ID: <24456.1200455812@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1257 Lines: 34 --==_Exmh_1200455812_2966P Content-Type: text/plain; charset=us-ascii On Tue, 15 Jan 2008 13:02:26 +0800, Shaohua Li said: > In my test, power difference between powersave mode and performance mode > is about 1.3w in a system with 3 PCIE links. Do you have any numbers on what the added latency is for powersave mode, and a rough idea of how quickly chipsets will drop to low-power? It may affect usability a lot if it's "adds 10ms latency after 100ms idle" or "adds 100ms latency after 5 seconds idle" or some other pattern... (The chipset in my laptop claims to be an 82801G with 4 PCI-Express ports on it - I'm trying to get a rough idea what usage I'd get out of that feature..) --==_Exmh_1200455812_2966P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFHjYCEcC3lWbTT17ARAhAhAJ9ZiY5Uua5IGdHOm05QLsvu8nF0/gCfU0zD g4w2n3pTVJZEZj7yrIUfvIc= =41lh -----END PGP SIGNATURE----- --==_Exmh_1200455812_2966P-- -- 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/