Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756866AbaFWUPI (ORCPT ); Mon, 23 Jun 2014 16:15:08 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:53212 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753812AbaFWUPG (ORCPT ); Mon, 23 Jun 2014 16:15:06 -0400 Date: Mon, 23 Jun 2014 22:15:03 +0200 From: Pavel Machek To: Ilia Mirkin Cc: Greg KH , kernel list , Ben Skeggs , Alexandre Courbot , David Airlie , "dri-devel@lists.freedesktop.org" Subject: Re: unparseable, undocumented /sys/class/drm/.../pstate Message-ID: <20140623201503.GA4551@amd.pavel.ucw.cz> References: <20140621180201.GA4621@amd.pavel.ucw.cz> <20140621194538.GA4903@kroah.com> <20140623130259.GA29809@amd.pavel.ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! > >> >> > I guess better interface would be something like > >> >> > > >> >> > pstate/07/core_clock_min > >> >> > core_clock_max > >> >> > memory_clock_min > >> >> > memory_clock_max > >> >> > > >> >> > and then pstate/active containing just the number of active state? > > > >> Could we just say that the format of this file is one-per-line of > >> > >> level: information-for-the-user > > > > But it is not. > > But it is... > > > Management tools will want to parse it, sooner or > > later. What is wrong with solution described above? > > It is complex and annoying to the people that will actually use it. grep -r . pstate/ is actually not that bad... And yes, some kind of utility to select right performance level would be nice in future... Or maybe not. Perhaps in not so distant future kernel will use right performance level for given load...? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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/