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| author | Xi Ruoyao <xry111@xry111.site> | 2023-02-28 11:48:28 +0800 |
|---|---|---|
| committer | Xi Ruoyao <xry111@xry111.site> | 2023-02-28 11:48:28 +0800 |
| commit | 83ce6e3161bf62021ef0dc06887d2380aed8bb8f (patch) | |
| tree | f5afdd5bda9b75168d8797b5ef7fcdaf463c2360 /chapter04 | |
| parent | 0cbb853d3c28d611c66d35123b97a07a1878ef1b (diff) | |
| parent | e122d24da1d6ba04333ed00c34ef586cd475993b (diff) | |
Merge branch 'trunk' into xry111/arm64
Diffstat (limited to 'chapter04')
| -rw-r--r-- | chapter04/aboutsbus.xml | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/chapter04/aboutsbus.xml b/chapter04/aboutsbus.xml index 82934d851..f88db24f6 100644 --- a/chapter04/aboutsbus.xml +++ b/chapter04/aboutsbus.xml @@ -13,17 +13,17 @@ <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 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 core 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 SBUs. This means that if your system took 10 minutes to compile and @@ -55,6 +55,11 @@ be more difficult because the lines from different processes will be 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> </sect1> |