From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Subject: Re: gen6 (SNB) GPU still stalling besides latest patches Date: Mon, 20 Jun 2011 17:19:29 -0700 Message-ID: <20110620171929.6eefc45b@jbarnes-desktop> References: <641187450.2215230.1308595927077.JavaMail.fmail@mwmweb017> <6606.1308614495@orpheus.gnusto.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from oproxy7-pub.bluehost.com (oproxy7-pub.bluehost.com [67.222.55.9]) by gabe.freedesktop.org (Postfix) with SMTP id 37EE09E7C2 for ; Mon, 20 Jun 2011 17:19:36 -0700 (PDT) In-Reply-To: <6606.1308614495@orpheus.gnusto.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: Ted Phelps Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org On Tue, 21 Jun 2011 10:01:35 +1000 Ted Phelps wrote: > > Hi Nicolas, > > Nicolas Kalkhof writes: > > SNB GPU still hangs frequently with kernel patches next-20110620 > > raising "drm:i915_hangcheck_ring_idle *ERROR* Hangcheck timer > > elapsed... gen6 bsd ring idle". This happens when multiple > > applications (mplayer decoding vaapi stream and some openGL game) > > running at the same time. With either one running there is no > > stalling. Could someone please confirm the issue? > > > > /sys/module/i915/parameters/semaphores is set to 0 > > xf86-video-intel compiled with --enable-sna > > I haven't tried SNA, but I've seen GPU hangs as well (SNB 2600K). I've > found that disabling RC6 (enable_rc6=0) seems to help. Can you see if > that helps? > > [Note to self: submit a bug report] Please do; and please try to confirm that your GPU hangs are really rc6 related. RC6 provides a huge (multiple Watt) power savings, and we really want it to be robust. -- Jesse Barnes, Intel Open Source Technology Center