Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751750AbaDYGXp (ORCPT ); Fri, 25 Apr 2014 02:23:45 -0400 Received: from mail-ee0-f41.google.com ([74.125.83.41]:53741 "EHLO mail-ee0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751168AbaDYGXo (ORCPT ); Fri, 25 Apr 2014 02:23:44 -0400 Message-ID: <1398407020.7893.34.camel@marge.simpson.net> Subject: Re: [RFC] A new CPU load metric for power-efficient scheduler: CPU ConCurrency From: Mike Galbraith To: Yuyang Du Cc: mingo@redhat.com, peterz@infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, arjan.van.de.ven@intel.com, len.brown@intel.com, rafael.j.wysocki@intel.com, alan.cox@intel.com, mark.gross@intel.com, morten.rasmussen@arm.com, vincent.guittot@linaro.org Date: Fri, 25 Apr 2014 08:23:40 +0200 In-Reply-To: <20140424193004.GA2467@intel.com> References: <20140424193004.GA2467@intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2014-04-25 at 03:30 +0800, Yuyang Du wrote: > To track CC, we intercept the scheduler in 1) enqueue, 2) dequeue, 3) > scheduler tick, and 4) enter/exit idle. Boo hiss to 1, 2 and 4. Less fastpath math would be better. -Mike -- 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/