From: Eric Anholt <eric@anholt.net>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] intel: Add support for (possibly) unsynchronized maps.
Date: Mon, 27 Feb 2012 11:05:32 -0800 [thread overview]
Message-ID: <87haycjdvn.fsf@eliezer.anholt.net> (raw)
In-Reply-To: <20120225110007.GA4222@phenom.ffwll.local>
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On Sat, 25 Feb 2012 12:00:07 +0100, Daniel Vetter <daniel@ffwll.ch> wrote:
> On Fri, Feb 24, 2012 at 07:53:22PM -0800, Eric Anholt wrote:
> > This improves the performance of Mesa's GL_MAP_UNSYNCHRONIZED_BIT path
> > in GL_ARB_map_buffer_range. Improves Unigine Tropics performance at
> > 1024x768 by 2.06236% +/- 0.50272% (n=11).
> > ---
>
> A few questions:
> - iirc Ben's non-blocking stuff also worked for non-llc machines - I guess
> you haven't looked into this because we don't have a non-llc platform
> that runs ungine?
I gave up on Ben's non-blocking stuff for being way too many patches all
smashed into one. I wanted a simple fix that could be extended later if
other apps have other problems, while completely fixing this app (a
~21ms wait shortly after starting a new frame).
> - in my pwrite experience, writing through cpu maps beats writing through
> the gtt on llc machines. This has the added benefit that it reduces
> pressure on the mappable gtt. Have you tried that, too?
I haven't played with that, but it would be fun to at some point once we
get there. Right now, the CPU overhead of the app isn't in this path.
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next prev parent reply other threads:[~2012-02-27 19:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-25 3:53 [PATCH] intel: Add support for (possibly) unsynchronized maps Eric Anholt
2012-02-25 3:53 ` [PATCH] intel: Make use of the new GPU-unsynchronized map functionality in libdrm Eric Anholt
2012-02-25 8:55 ` [PATCH] intel: Add support for (possibly) unsynchronized maps Chris Wilson
2012-02-25 9:03 ` Paul Menzel
2012-02-25 11:00 ` Daniel Vetter
2012-02-25 11:16 ` Chris Wilson
2012-02-26 20:28 ` Kenneth Graunke
2012-02-27 11:15 ` Ben Widawsky
2012-02-27 19:05 ` Eric Anholt [this message]
2012-02-28 7:35 ` [PATCH 1/2] intel: Fix error check for I915_PARAM_HAS_LLC Eric Anholt
2012-02-28 7:35 ` [PATCH 2/2] intel: Add support for (possibly) unsynchronized maps Eric Anholt
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