Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763440AbZDAO7K (ORCPT ); Wed, 1 Apr 2009 10:59:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758525AbZDAO6z (ORCPT ); Wed, 1 Apr 2009 10:58:55 -0400 Received: from qw-out-2122.google.com ([74.125.92.26]:49003 "EHLO qw-out-2122.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757419AbZDAO6y (ORCPT ); Wed, 1 Apr 2009 10:58:54 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=OMBfbkChHefYyixAqdG2tNgCQ/ohPzMk69Z+FzD9DmhnVSJZzJNHyfKyFkGR6DBhuS ltqkk10GeJFY9SPofRWwgx4KP1iW7qCE8FTOLjr7V3dGU/gp/r+WxdoBOUEB5fKxioZz NzwRmuZnTmnaZOdrT8Igm2apu7oYPw2EzZ+dM= MIME-Version: 1.0 Date: Wed, 1 Apr 2009 23:58:51 +0900 Message-ID: Subject: [RFC] Improving scheduler for asymmetric multi-core processor in Google's summer of code From: Hitoshi Mitake To: linux-kernel@vger.kernel.org, cpufreq@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 953 Lines: 27 Hi, I found an interesting problem, scheduling on Asymmetric multi-core processor. According to this paper, http://portal.acm.org/citation.cfm?id=1362694&dl=GUIDE&coll=GUIDE&CFID=28487975&CFTOKEN=68150071 taking performance asymmetry into consideration on multi-core CPUs can improve scheduler performance. (And I think discarding this could have bad consequences.) So I have a question: Is the current scheduler of Linux aware of possible performance asymmetry of the cores? By performance asymmetry I mean a case where different cores run on different frequencies. If something tackling this issue is not implemented yet, I would like to work on that as a project of Google's summer of code. Thanks -- 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/