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Timestamp:
01/15/2006 12:10:43 PM (18 years ago)
Author:
Manuel Canales Esparcia <manuel@…>
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10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.5-systemd, 7.6, 7.6-systemd, 7.7, 7.7-systemd, 7.8, 7.8-systemd, 7.9, 7.9-systemd, 8.0, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc
Children:
3467c02f
Parents:
b0ed1af
Message:

Indented chapter 04.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@7275 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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  • chapter04/aboutsbus.xml

    rb0ed1af r6a3b6af  
    11<?xml version="1.0" encoding="ISO-8859-1"?>
    2 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
     2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
     3  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
    34  <!ENTITY % general-entities SYSTEM "../general.ent">
    45  %general-entities;
    56]>
     7
    68<sect1 id="prepare-aboutsbus">
    7 <title>About SBUs</title>
    8 <?dbhtml filename="aboutsbus.html"?>
     9  <?dbhtml filename="aboutsbus.html"?>
    910
    10 <para>Many people would like to know beforehand approximately how long
    11 it takes to compile and install each package. Because Linux From
    12 Scratch can be built on many different systems, it is impossible to
    13 provide accurate time estimates.  The biggest package (Glibc) will
    14 take approximately 20 minutes on the fastest systems, but could take
    15 up to three days on slower systems! Instead of providing actual times,
    16 the Standard Build Unit (SBU) measure will be
    17 used instead.</para>
     11  <title>About SBUs</title>
    1812
    19 <para>The SBU measure works as follows. The first package to be compiled
    20 from this book is Binutils in <xref linkend="chapter-temporary-tools"/>.  The
    21 time it takes to compile this package is what will be referred to as the
    22 Standard Build Unit or SBU. All other compile times will be expressed relative
    23 to this time.</para>
     13  <para>Many people would like to know beforehand approximately how long
     14  it takes to compile and install each package. Because Linux From
     15  Scratch can be built on many different systems, it is impossible to
     16  provide accurate time estimates. The biggest package (Glibc) will
     17  take approximately 20 minutes on the fastest systems, but could take
     18  up to three days on slower systems! Instead of providing actual times,
     19  the Standard Build Unit (SBU) measure will be
     20  used instead.</para>
    2421
    25 <para>For example, consider a package whose compilation time is 4.5
    26 SBUs. This means that if a system took 10 minutes to compile and
    27 install the first pass of Binutils, it will take
    28 <emphasis>approximately</emphasis> 45 minutes to build this example package.
    29 Fortunately, most build times are shorter than the one for Binutils.</para>
     22  <para>The SBU measure works as follows. The first package to be compiled
     23  from this book is Binutils in <xref linkend="chapter-temporary-tools"/>. The
     24  time it takes to compile this package is what will be referred to as the
     25  Standard Build Unit or SBU. All other compile times will be expressed relative
     26  to this time.</para>
    3027
    31 <para>In general, SBUs are not entirely accurate because they depend on many
    32 factors, including the host system's version of GCC. Note that on Symmetric
    33 Multi-Processor (SMP)-based machines, SBUs are even less accurate.  They are
    34 provided here to give an estimate of how long it might take to install a
    35 package, but the numbers can vary by as much as dozens of minutes in some
    36 cases.</para>
     28  <para>For example, consider a package whose compilation time is 4.5
     29  SBUs. This means that if a system took 10 minutes to compile and
     30  install the first pass of Binutils, it will take
     31  <emphasis>approximately</emphasis> 45 minutes to build this example package.
     32  Fortunately, most build times are shorter than the one for Binutils.</para>
    3733
    38 <para>To view actual timings for a number of specific machines, we recommend
    39 The LinuxFromScratch SBU Home Page at <ulink url="&lfs-root;~bdubbs/"/>.</para>
     34  <para>In general, SBUs are not entirely accurate because they depend on many
     35  factors, including the host system's version of GCC. Note that on Symmetric
     36  Multi-Processor (SMP)-based machines, SBUs are even less accurate. They are
     37  provided here to give an estimate of how long it might take to install a
     38  package, but the numbers can vary by as much as dozens of minutes in some
     39  cases.</para>
     40
     41  <para>To view actual timings for a number of specific machines, we recommend
     42  The LinuxFromScratch SBU Home Page at <ulink url="&lfs-root;~bdubbs/"/>.</para>
    4043
    4144</sect1>
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