From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wilson Subject: Re: [PATCH] drm/i915: Use PM QoS to prevent C-state memory starvation of the GPU Date: Wed, 08 Dec 2010 16:54:21 +0000 Message-ID: References: <20100921202607.2b46ffca@gmail.com> <1291825475-22106-1-git-send-email-chris@chris-wilson.co.uk> <201012081844.42123.anarsoul@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 6EB669E732 for ; Wed, 8 Dec 2010 08:54:24 -0800 (PST) In-Reply-To: <201012081844.42123.anarsoul@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Vasily Khoruzhick Cc: intel-gfx@lists.freedesktop.org, Paolo Ornati List-Id: intel-gfx@lists.freedesktop.org On Wed, 8 Dec 2010 18:44:41 +0200, Vasily Khoruzhick wrote: > On Wednesday 08 December 2010 18:24:35 Chris Wilson wrote: > > This is just a preliminary attempt to see if this even helps. Obviously > > some more effort will need to be spent investigating a better choice of > > latency and when we need to request it, but first: does this help? > > Sorry, but it does not. glxgears is still jerky. I thought we were trying to fix the reported framerate? Try adjusting the request max latency down from 20 to 1, or even 0. -Chris -- Chris Wilson, Intel Open Source Technology Centre