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2<!DOCTYPE sections SYSTEM "/dtd/book.dtd"> 2<!DOCTYPE sections SYSTEM "/dtd/book.dtd">
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4<!-- The content of this document is licensed under the CC-BY-SA license --> 4<!-- The content of this document is licensed under the CC-BY-SA license -->
5<!-- See http://creativecommons.org/licenses/by-sa/2.5 --> 5<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
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7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/2007.0/hb-install-ppc64-medium.xml,v 1.5 2007/04/13 15:34:14 nightmorph Exp $ --> 7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/2007.0/hb-install-ppc64-medium.xml,v 1.6 2007/04/21 03:48:55 nightmorph Exp $ -->
8 8
9<sections> 9<sections>
10 10
11<version>8.0</version> 11<version>8.0</version>
12<date>2007-04-13</date> 12<date>2007-04-20</date>
13 13
14<section> 14<section>
15<title>Hardware Requirements</title> 15<title>Hardware Requirements</title>
16<subsection> 16<subsection>
17<title>Introduction</title> 17<title>Introduction</title>
124<p> 124<p>
125The use of the Package CD is covered later in this document. 125The use of the Package CD is covered later in this document.
126</p> 126</p>
127 127
128</body> 128</body>
131<title>Choosing a userland</title>
135On PPC64, the kernel is 64-bit and the <e>userland</e> can be 32-bit or 64-bit. The
136userland is basically the applications you are running, such as
137<c>bash</c> or <c>mozilla-firefox</c>. They can be compiled and run in either
13864-bit or 32-bit modes. The Gentoo/PPC64 team provides both 32-bit and 64-bit
139userlands, so which one should you use?
143You may have heard that 64-bit applications are better, but in fact, 32-bit
144applications take up slightly less memory and often run a little bit faster than
14564-bit applications.
149You really only need 64-bit applications when you need more memory than a 32-bit
150userland allows, or if you do a lot of 64-bit number crunching. If you run
151applications that require more than 4GB of memory or you run scientific
152applications, you should choose the 64-bit userland. Otherwise, choose the
15332-bit userland, as it is recommended by the Gentoo/PPC64 developers.
157Additionally, the 32-bit userland has been available in Portage longer than the
15864-bit userland has. This means that there are more applications tested in the
15932-bit userland that just work "out of the box." Many applications compiled for
160the 64-bit userland may be just as stable as the 32-bit version, but they
161haven't been tested yet. Though testing isn't difficult to do, it can be
162annoying and time consuming if you want to use many untested 64-bit
163applications. Also, some programs just won't run in the 64-bit userland until
164their code is fixed, such as OpenOffice.
168The Gentoo/PPC64 team provides stages and Package CDs for both 32-bit and 64-bit
169userlands, so no matter which one you choose, you'll be able to successfully
170install Gentoo and get a full system up and running with minimal fuss.
129</subsection> 174</subsection>
130</section> 175</section>
131<!-- STOP --> 176<!-- STOP -->
132<section> 177<section>
133<title>Download, Burn and Boot a Gentoo Installation CD</title> 178<title>Download, Burn and Boot a Gentoo Installation CD</title>

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