Changeset 7c92d6d for chapter04

Timestamp:

02/12/2023 07:43:45 PM (15 months ago)

Author:

Bruce Dubbs <bdubbs@…>

Branches:

11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, bdubbs/gcc13, multilib, renodr/libudev-from-systemd, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/update-glibc

Children:

4990283

Parents:

c6550e1

Message:

Update build times an sizes.

This update changes the default number of cores used to build
packages to 4. A section is also added to host requirements
to recommend a minumum number of cores and memory size.

File:

• chapter04/aboutsbus.xml (modified) (2 diffs)

chapter04/aboutsbus.xml

@@ -14 +14 @@
   it takes to compile and install each package. Because Linux From
   Scratch can be built on many different systems, it is impossible to
-  provide absolute 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,
+  provide absolute time estimates. The biggest package (gcc) will
+  take approximately 5 minutes on the fastest systems, but could take
+  days on slower systems! Instead of providing actual times,
   the Standard Build Unit (SBU) measure will be
   used instead.</para>
 
-  <para>The SBU measure works as follows. The first package to be compiled
-  is binutils in <xref linkend="chapter-cross-tools"/>. The
-  time it takes to compile this package is what we will refer to as the
-  Standard Build Unit or SBU. All other compile times will be expressed in
-  terms of this unit of time.</para>
+  <para>The SBU measure works as follows. The first package to be compiled is
+  binutils in <xref linkend="chapter-cross-tools"/>. The time it takes to
+  compile using one corethis package is what we will refer to as the Standard
+  Build Unit or SBU. All other compile times will be expressed in terms of this
+  unit of time.</para>
 
   <para>For example, consider a package whose compilation time is 4.5
@@ -56 +56 @@
     interleaved.  If you run into a problem with a build step, revert to a
     single processor build to properly analyze the error messages.</para>
+
+    <para>The times presented here are based upon using four cores (-j4). The
+    times in Chapter 8 also include the time to run the regression tests for
+    the package unless specified otherwise.</para>
+
   </note>