Changeset 406e5ffe for introduction/welcome/conventions.xml

Timestamp:

04/05/2018 10:31:16 PM (6 years ago)

Author:

Ken Moffat <ken@…>

Branches:

10.0, 10.1, 11.0, 11.1, 11.2, 11.3, 12.0, 12.1, 8.3, 8.4, 9.0, 9.1, basic, bdubbs/svn, elogind, kea, ken/TL2024, ken/inkscape-core-mods, ken/tuningfonts, lazarus, lxqt, perl-modules, plabs/newcss, plabs/python-mods, python3.11, qt5new, rahul/power-profiles-daemon, renodr/vulkan-addition, trunk, upgradedb, xry111/intltool, xry111/llvm18, xry111/soup3, xry111/test-20220226, xry111/xf86-video-removal

Children:

20a27fc

Parents:

b81acc38

Message:

Firefox-59.0.2 and reword its note on how the SBUs vary, also extend the SBU comments in the Conventions section.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@20044 af4574ff-66df-0310-9fd7-8a98e5e911e0

File:

• introduction/welcome/conventions.xml (modified) (1 diff)

introduction/welcome/conventions.xml

@@ -235 +235 @@
     depends on the individual package and specific hardware used.  </para>
 
+    <para>For packages which use ninja (e.g. anything using meson) or rust, by
+    default all cores are used so similar comments will be seen on such packages
+    even when the build time is minimal.</para>
+
     <para>Where even a parallel build takes more than 15 SBU, on certain
     machines the time may be considerably greater even when the build does not
-    use swap.</para>
+    use swap. In particular, different micro-architectures will build some
+    files at different relative speeds and this can introduce delays when
+    certain make targets wait for another file to be created. Where a large
+    build uses a lot of C++ files, processors with Simultaneous Multi Threading
+    will share the Floating Point Unit and can take 45% longer than when using
+    four 'prime' cores (measured on an intel i7 using taskset and keeping the
+    other cores idle).</para>
 
     <para>Some packages do not support parallel builds and using -j1 for the