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Code Issues Releases Activity

New release notes: LAZY_SWITCH, new docs and translation team.

Browse Source 
Modified release notes:  Rewrite HTT note to conform to reality, fix a
couple of typos referring to options directives [1], add missing words
in gdtoa note.

MFC noted:  sbsh(4).

Inspired by:	bde message <20030420022510.O16869@gamplex.bde.org> to
		current@ [1]
This commit is contained in:
Bruce A. Mah 2003-04-19 17:57:14 +00:00
parent 6d63c80290
commit 974855ae3c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=113718
2 changed files with 76 additions and 22 deletions
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49
release/doc/en_US.ISO8859-1/relnotes/article.sgml
View File

@ -198,15 +198,36 @@
compatibility), and also reduces the possibility of running out
of device major numbers.</para>
<para arch="i386,pc98">A partial lazy switch mechanism for
in-kernel threads has been implemented; it is designed to reduce
the overhead of short context switches (such as for interrupt
handlers) that do not involve another process. This feature can
be enabled with
<literal>options&nbsp;LAZY_SWITCH</literal>.</para>
<sect3 id="proc">
<title>Processor/Motherboard Support</title>
<para arch="i386">&os; now has rudimentary support for
HyperThreading (HTT). SMP kernels with the
<literal>HTT</literal> kernel option will detect and start up
the logical processors on HTT-capable machines. The logical
processors will be treated like additional physical processors
for the purposes of process scheduling. &merged;</para>
<para arch="i386"><literal>SMP</literal> kernels now have
rudimentary support for HyperThreading (HTT). The scheduler
treats the logical CPUs as if they were additional physical
CPUs. This can actually cause suboptimal performance in some
cases due to contention for resources. Therefore, logical
CPUs are halted by default at startup. They can be enabled
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 &man.smp.4; manual page has more details.
<note>
<para>Some other versions of &os;, including early
5.0-STABLE snapshots and 4.8-RELEASE, used
<literal>options&nbsp;HTT</literal> to enable
HyperThreading support at kernel configuration time. This
option is no longer necessary.</para>
</note>
</para>
<para arch="i386">Support for the Physical Address Extensions
(PAE) capability on Intel Pentium Pro and higher processors
@ -262,7 +283,7 @@
<para>The cm driver now supports IPX. &merged;</para>
<para arch="i386">The &man.sbsh.4; driver for the Granch SBNI16
SHDSL modem has been added.</para>
SHDSL modem has been added. &merged;</para>
<para>A new &man.wlan.4; module provides 802.11 link-layer support. The
&man.wi.4; driver now uses this facility.</para>
@ -433,8 +454,8 @@
kernel configuration file directive that cancels the effect of a
<literal>device</literal> directive. The new
<literal>nooption</literal> and <literal>nomakeoption</literal>
directives cancel prior <literal>option</literal> and
<literal>makeoption</literal> directives, respectively.</para>
directives cancel prior <literal>options</literal> and
<literal>makeoptions</literal> directives, respectively.</para>
<para>The &man.diskinfo.8; utility has been added to show
information about a disk device and optionally to run a naive
@ -696,7 +717,7 @@
3.2.2 (release version).</para>
<para>The <application>gdtoa</application> library, for
conversions between strings and floating point. These sources
conversions between strings and floating point, has been imported. These sources
were dated 24 March 2003.</para>
<para><application>IPFilter</application> has been updated to
@ -805,7 +826,13 @@
<sect2 id="doc">
<title>Documentation</title>
<para></para>
<para>The following new articles have been added to the
documentation set: <quote>FreeBSD From Scratch</quote>,
<quote>The Roadmap for 5-STABLE</quote>.
<para>A new Danish (<filename>da_DK.ISO8859-1</filename>)
translation project has been started.</para>
</sect2>
</sect1>

49
release/doc/en_US.ISO8859-1/relnotes/common/new.sgml
View File

@ -198,15 +198,36 @@
compatibility), and also reduces the possibility of running out
of device major numbers.</para>
<para arch="i386,pc98">A partial lazy switch mechanism for
in-kernel threads has been implemented; it is designed to reduce
the overhead of short context switches (such as for interrupt
handlers) that do not involve another process. This feature can
be enabled with
<literal>options&nbsp;LAZY_SWITCH</literal>.</para>
<sect3 id="proc">
<title>Processor/Motherboard Support</title>
<para arch="i386">&os; now has rudimentary support for
HyperThreading (HTT). SMP kernels with the
<literal>HTT</literal> kernel option will detect and start up
the logical processors on HTT-capable machines. The logical
processors will be treated like additional physical processors
for the purposes of process scheduling. &merged;</para>
<para arch="i386"><literal>SMP</literal> kernels now have
rudimentary support for HyperThreading (HTT). The scheduler
treats the logical CPUs as if they were additional physical
CPUs. This can actually cause suboptimal performance in some
cases due to contention for resources. Therefore, logical
CPUs are halted by default at startup. They can be enabled
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 &man.smp.4; manual page has more details.
<note>
<para>Some other versions of &os;, including early
5.0-STABLE snapshots and 4.8-RELEASE, used
<literal>options&nbsp;HTT</literal> to enable
HyperThreading support at kernel configuration time. This
option is no longer necessary.</para>
</note>
</para>
<para arch="i386">Support for the Physical Address Extensions
(PAE) capability on Intel Pentium Pro and higher processors
@ -262,7 +283,7 @@
<para>The cm driver now supports IPX. &merged;</para>
<para arch="i386">The &man.sbsh.4; driver for the Granch SBNI16
SHDSL modem has been added.</para>
SHDSL modem has been added. &merged;</para>
<para>A new &man.wlan.4; module provides 802.11 link-layer support. The
&man.wi.4; driver now uses this facility.</para>
@ -433,8 +454,8 @@
kernel configuration file directive that cancels the effect of a
<literal>device</literal> directive. The new
<literal>nooption</literal> and <literal>nomakeoption</literal>
directives cancel prior <literal>option</literal> and
<literal>makeoption</literal> directives, respectively.</para>
directives cancel prior <literal>options</literal> and
<literal>makeoptions</literal> directives, respectively.</para>
<para>The &man.diskinfo.8; utility has been added to show
information about a disk device and optionally to run a naive
@ -696,7 +717,7 @@
3.2.2 (release version).</para>
<para>The <application>gdtoa</application> library, for
conversions between strings and floating point. These sources
conversions between strings and floating point, has been imported. These sources
were dated 24 March 2003.</para>
<para><application>IPFilter</application> has been updated to
@ -805,7 +826,13 @@
<sect2 id="doc">
<title>Documentation</title>
<para></para>
<para>The following new articles have been added to the
documentation set: <quote>FreeBSD From Scratch</quote>,
<quote>The Roadmap for 5-STABLE</quote>.
<para>A new Danish (<filename>da_DK.ISO8859-1</filename>)
translation project has been started.</para>
</sect2>
</sect1>