Author: manuel Date: 2005-06-03 11:34:05 -0600 (Fri, 03 Jun 2005) New Revision: 5624
Modified: branches/cross-lfs/BOOK/final-preps/aboutsbus.xml Log: Indented final-preps/aboutsbus.xml Modified: branches/cross-lfs/BOOK/final-preps/aboutsbus.xml =================================================================== --- branches/cross-lfs/BOOK/final-preps/aboutsbus.xml 2005-06-03 17:31:37 UTC (rev 5623) +++ branches/cross-lfs/BOOK/final-preps/aboutsbus.xml 2005-06-03 17:34:05 UTC (rev 5624) @@ -1,50 +1,56 @@ <?xml version="1.0" encoding="ISO-8859-1"?> -<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd"; [ +<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" + "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd"; [ <!ENTITY % general-entities SYSTEM "../general.ent"> %general-entities; ]> + <sect1 id="ch-final-preps-aboutsbus"> -<title>About SBUs</title> -<?dbhtml filename="aboutsbus.html"?> + <?dbhtml filename="aboutsbus.html"?> -<para>Many people would like to know beforehand approximately how long -it takes to compile and install each package. Because Linux From -Scratch can be built on many different systems, it is impossible to -provide accurate time estimates. The biggest package (Glibc) will -take approximately 20 minutes on the fastest systems, but could take -up to three days on slower systems! Instead of providing actual times, -the Static Build Unit (SBU) measure will be -used instead.</para> + <title>About SBUs</title> -<para>The SBU measure works as follows. The first package to be compiled -from this book is the statically-linked Binutils in <xref -linkend="chapter-temporary-tools"/>. The time it takes to compile -this package is what will be referred to as the Static Build Unit -or SBU. All other compile times will be expressed relative to this -time.</para> + <para>TO BE REWRITTEN</para> -<para>For example, consider a package whose compilation time is 4.5 -SBUs. This means that if a system took 10 minutes to compile and -install the static Binutils, it will take -<emphasis>approximately</emphasis> 45 minutes to build this example -package. Fortunately, most build times are shorter than the one -for Binutils.</para> + <!-- + <para>Many people would like to know beforehand approximately how long + it takes to compile and install each package. Because Linux From + Scratch can be built on many different systems, it is impossible to + provide accurate time estimates. The biggest package (Glibc) will + take approximately 20 minutes on the fastest systems, but could take + up to three days on slower systems! Instead of providing actual times, + the Static Build Unit (SBU) measure will be + used instead.</para> -<para>Please note that if the system compiler on the host is GCC-2.x based, the -SBUs listed may be somewhat understated. This is because the SBU is -based on the very first package, compiled with the old GCC, while the -rest of the system is compiled with the newer GCC-&gcc-version; (which is -known to be approximately 30 percent slower). SBUs are also not -highly accurate for Symmetric Multi-Processor (SMP)-based machines.</para> + <para>The SBU measure works as follows. The first package to be compiled + from this book is the statically-linked Binutils in <xref + linkend="chapter-temporary-tools"/>. The time it takes to compile + this package is what will be referred to as the Static Build Unit + or SBU. All other compile times will be expressed relative to this + time.</para> -<para>To view actual timings for a number of specific machines, we recommend -<ulink url="&lfs-root;~bdubbs/"/>.</para> + <para>For example, consider a package whose compilation time is 4.5 + SBUs. This means that if a system took 10 minutes to compile and + install the static Binutils, it will take + <emphasis>approximately</emphasis> 45 minutes to build this example + package. Fortunately, most build times are shorter than the one + for Binutils.</para> -<para>In general, SBUs are not very accurate because they depend on many -factors, not just the GCC version. They are provided -here to give an estimate of how long it might take to -install a package, but the numbers can vary by as much as dozens of -minutes in some cases.</para> + <para>Please note that if the system compiler on the host is GCC-2.x based, the + SBUs listed may be somewhat understated. This is because the SBU is + based on the very first package, compiled with the old GCC, while the + rest of the system is compiled with the newer GCC-&gcc-version; (which is + known to be approximately 30 percent slower). SBUs are also not + highly accurate for Symmetric Multi-Processor (SMP)-based machines.</para> + <para>To view actual timings for a number of specific machines, we recommend + <ulink url="&lfs-root;~bdubbs/"/>.</para> + + <para>In general, SBUs are not very accurate because they depend on many + factors, not just the GCC version. They are provided + here to give an estimate of how long it might take to + install a package, but the numbers can vary by as much as dozens of + minutes in some cases.</para> + --> + </sect1> - -- http://linuxfromscratch.org/mailman/listinfo/lfs-book FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
