Attachment 75398 Details for Bug 116506 – dri-howto.xml.patch

[patch] dri-howto.xml.patch

dri-howto.xml.patch (text/plain), 3.36 KB, created by nm (RETIRED) on 2005-12-23 10:07:08 UTC

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Creator: nm (RETIRED)

Created: 2005-12-23 10:07:08 UTC

Size: 3.36 KB

patch

obsolete

>--- dri-howto.xml.orig	2005-12-23 08:43:01.000000000 -0800
>+++ dri-howto.xml	2005-12-23 10:04:41.000000000 -0800
>@@ -20,8 +20,8 @@
> 
> <license/>
> 
>-<version>1.0.15</version>
>-<date>2005-12-16</date>
>+<version>1.0.16</version>
>+<date>2005-12-23</date>
> 
> <chapter>
> <title>Introduction</title>
>@@ -436,14 +436,64 @@
> <body>
> 
> 
>-A few options may increase performance by up to 30 percent (or more) over the 
>-default. Set them in <path>/etc/X11/xorg.conf</path>.
>+A few options may increase performance by up to 30 percent (or more) over the
>+default. Set them in <path>/etc/X11/xorg.conf</path>. However, you will first
>+need to check that your motherboard and video card support these options.
> 
> 
>+
>+First, let's check the supported modes of your video cards, and see if your it
>+supports fast writes. Remember to replace <c>nvidia</c> with the actual name of
>+your device in <path>/proc/driver/nvidia/</path>.
>+
>+
>+<pre caption="Video card check">
>+$ cat /proc/driver/nvidia/agp/card
>+
>+Fast Writes: Supported
>+SBA: Not Supported
>+AGP Rates: 4x 2x 1x
>+Registers: 0x1f000017:0x1f000104
>+</pre>
>+
>+
>+This shows that my card is capable of Fast Writes, which can noticeably improve
>+performance, as you will see later. However, the card does not support side
>+band addressing (<c>SBA</c>, a great way to make your hardware to deliver the
>+performance it should). However, it is capable of writing at 4x, which is the
>+ideal setting, and should be used by default.
>+
>+
>+
>+Next, let's check out the capabilities of the motherboard:
>+
>+
>+<pre caption="Mmotherboard check">
>+$ cat /proc/driver/nvidia/agp/host-bridge
>+
>+Host Bridge: Intel Corporation 82815 815 Chipset Host Bridge and Memory Controller Hub
>+Fast Writes: Not Supported
>+SBA: Supported
>+AGP Rates: 4x 2x 1x
>+Registers: 0x1f000207:0x00000104
>+</pre>
>+
>+
>+Unfortunately, though my motherboard supports SBA, it does not support Fast
>+Writes. This means that I can use neither Fast Writes nor side band addressing,
>+as both components need to support them. However, your hardware may support
>+both. If it does, you can try out the example settings below.
>+
>+
>+<impo>
>+Remember, the modes and capabilities for your video card and motherboard must
>+match for these settings to work!
>+</impo>
>+
> <pre caption="xorg.conf">
> Section "Device"
> Option "AGPMode" "4"
>- <comment>(This increased FPS from 609 to 618.)</comment>
>+ <comment>This increased FPS from 609 to 618. This sets the card to run at 4x speed. Use the multiples provided in your /proc info.</comment>
> Option "AGPFastWrite" "True"
> <comment>(This had no measurable effect, but it may increase instability of your computer.)</comment>
> <comment>(You may also need to set it in your BIOS.)</comment>
>@@ -453,6 +503,17 @@
> EndSection
> </pre>
> 
>+<warn>
>+Note that enabling <c>AGPFastWrite</c> on a VIA chipset will very likely cause
>+your machine to lock up. VIA chipsets do not play nice with fast writes, so use
>+this setting at your own risk.
>+</warn>
>+
>+<note>
>+Remember, if you want fast writes and sideband addressing to work properly, you
>+will have to first enable them in your BIOS.
>+</note>
>+
> 
> If you want to set even more features, check out the <uri
> link="http://dri.freedesktop.org/wiki/FeatureMatrix">feature matrix</uri> on

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