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authorHiroki Sato <hrs@FreeBSD.org>2013-06-02 15:47:22 +0000
committerHiroki Sato <hrs@FreeBSD.org>2013-06-02 15:47:22 +0000
commitce2d23d4c3fff277d2f9ed9629a0156d17eee216 (patch)
tree200c78b14a4df5e3e3340bdf272079718775c99b
parent9fe10651e978a457fa880db36fe019af08ed66a7 (diff)
downloadsrc-test2-ce2d23d4c3fff277d2f9ed9629a0156d17eee216.tar.gz
src-test2-ce2d23d4c3fff277d2f9ed9629a0156d17eee216.zip
Notes
-rw-r--r--release/doc/en_US.ISO8859-1/hardware/article.xml21
1 files changed, 7 insertions, 14 deletions
diff --git a/release/doc/en_US.ISO8859-1/hardware/article.xml b/release/doc/en_US.ISO8859-1/hardware/article.xml
index 786cb1fc6286..80eedb8cf096 100644
--- a/release/doc/en_US.ISO8859-1/hardware/article.xml
+++ b/release/doc/en_US.ISO8859-1/hardware/article.xml
@@ -167,20 +167,13 @@
bugs may generate some problems. Perusal of the archives of
the &a.smp; may yield some clues.</para>
- <para>&os; will take advantage of HyperThreading (HTT) support
- on &intel; CPUs that support this feature. A kernel with the
- <literal>options&nbsp;SMP</literal> feature enabled will
- automatically detect the additional logical processors. The
- default &os; scheduler treats the logical processors the same
- as additional physical processors; in other words, no attempt
- is made to optimize scheduling decisions given the shared
- resources between logical processors within the same CPU.
- Because this naive scheduling can result in suboptimal
- performance, under certain circumstances it may be useful to
- disable the logical processors with the
- <varname>machdep.hlt_logical_cpus</varname> sysctl variable.
- It is also possible to halt any CPU in the idle loop with the
- <varname>machdep.hlt_cpus</varname> sysctl variable. The
+ <para>&os; will take advantage of SMT (Symmetric MultiThreading,
+ also known as HyperThreading on &intel; CPUs) on the supported
+ CPUs. The <filename>GENERIC</filename> kernel which is
+ installed by default will automatically detect the additional
+ logical processors. The default &os; scheduler recognizes
+ processor topology on the system and selects logical and
+ physical processors to obtain optimal performance. The
&man.smp.4; manual page has more details.</para>
<para>&os; will take advantage of Physical Address Extensions