From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ted Phelps Subject: Re: [PATCH] drm/i915: Try enabling RC6 by default (again) Date: Fri, 05 Aug 2011 11:41:09 +1000 Message-ID: <30203.1312508469@orpheus.gnusto.com> References: <1312428234-8526-1-git-send-email-keithp@keithp.com> <16320.1312466753@orpheus.gnusto.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from laika.gnusto.com (laika.gnusto.com [207.44.178.75]) by gabe.freedesktop.org (Postfix) with ESMTP id 15EDC9E837 for ; Thu, 4 Aug 2011 18:41:28 -0700 (PDT) In-reply-to: Your message of Thu, 04 Aug 2011 17:51:44 +0200. 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: Daniel Vetter Cc: Pekka Enberg , Gu Rui , intel-gfx@lists.freedesktop.org, Francesco Allertsen List-Id: intel-gfx@lists.freedesktop.org Daniel Vetter writes: > On Thu, Aug 4, 2011 at 16:05, Ted Phelps wrote: > > I saw a bunch of stack traces like the one below, alternating between > > ring_put and ring_get, before the GPU was declared wedged. > > How much time happens between the first wait_for_fifo backtrace and > the final gpu hang report? About 6 seconds. All 20 ring_put/ring_get failures happen in the same second, then there's a 4 second pause before the GPU is first declared hung, and another couple of seconds before the GPU is declared wedged: Aug 4 23:37:02 orpheus kernel: ------------[ cut here ]------------ ... Aug 4 23:37:06 orpheus kernel: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung ... Aug 4 23:37:08 orpheus kernel: [drm:i915_reset] *ERROR* GPU hanging too fast, declaring wedged! Aug 4 23:37:08 orpheus kernel: [drm:i915_reset] *ERROR* Failed to reset chip. > If it's short (order of a second or less) can you rehang your gpu with > kernel log timestamping switched on? I'm happy to re-hang the GPU with kernel log timestamping enabled, but I won't be able to do so until Sunday night. Cheers, -Ted