diff options
author | Hiroki Sato <hrs@FreeBSD.org> | 2013-06-02 15:47:22 +0000 |
---|---|---|
committer | Hiroki Sato <hrs@FreeBSD.org> | 2013-06-02 15:47:22 +0000 |
commit | ce2d23d4c3fff277d2f9ed9629a0156d17eee216 (patch) | |
tree | 200c78b14a4df5e3e3340bdf272079718775c99b | |
parent | 9fe10651e978a457fa880db36fe019af08ed66a7 (diff) | |
download | src-test2-ce2d23d4c3fff277d2f9ed9629a0156d17eee216.tar.gz src-test2-ce2d23d4c3fff277d2f9ed9629a0156d17eee216.zip |
Notes
-rw-r--r-- | release/doc/en_US.ISO8859-1/hardware/article.xml | 21 |
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 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 |