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<!ENTITY legal SYSTEM "legal.xml">
<!ENTITY appletversion "2.12.0">
<!ENTITY applet "CPU Frequency Scaling Monitor">
]>
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<article id="index" lang="en_GB">
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  <articleinfo> 
	<title>CPU Frequency Scaling Monitor Manual</title> 
        <abstract role="description">
	  <para>CPU Frequency Scaling Monitor shows the current clock speed of the CPU and provides an interface to change the clock speed if the CPU supports it.</para>
	</abstract>
	<copyright>
	  <year>2005</year>
	  <holder>Davyd Madeley</holder>
	</copyright>
        <copyright>
	   <year>2004</year>
            <holder>GNOME Foundation</holder>
        </copyright><copyright><year>2007</year><holder>David Lodge (dave@cirt.net)</holder></copyright>

<!-- translators: uncomment this:
  <copyright>
   <year>2003</year>
   <holder>ME-THE-TRANSLATOR (Latin translation)</holder>
  </copyright>
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	 <publisher role="maintainer"> 
		<publishername>GNOME Documentation Project</publishername> 
	 </publisher> 

  <legalnotice id="legalnotice">
	<para>Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation Licence (GFDL), Version 1.1 or any later version published by the Free Software Foundation with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. You can find a copy of the GFDL at this <ulink type="help" url="ghelp:fdl">link</ulink> or in the file COPYING-DOCS distributed with this manual.</para>
         <para>This manual is part of a collection of GNOME manuals distributed under the GFDL. If you want to distribute this manual separately from the collection, you can do so by adding a copy of the licence to the manual, as described in section 6 of the licence.</para>

	<para>Many of the names used by companies to distinguish their products and services are claimed as trademarks. Where those names appear in any GNOME documentation, and the members of the GNOME Documentation Project are made aware of those trademarks, then the names are in capital letters or initial capital letters.</para>

	<para>DOCUMENT AND MODIFIED VERSIONS OF THE DOCUMENT ARE PROVIDED UNDER THE TERMS OF THE GNU FREE DOCUMENTATION LICENCE WITH THE FURTHER UNDERSTANDING THAT: <orderedlist>
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		  <para>DOCUMENT IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES THAT THE DOCUMENT OR MODIFIED VERSION OF THE DOCUMENT IS FREE OF DEFECTS MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY, ACCURACY AND PERFORMANCE OF THE DOCUMENT OR MODIFIED VERSION OF THE DOCUMENT IS WITH YOU. SHOULD ANY DOCUMENT OR MODIFIED VERSION PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT THE INITIAL WRITER, AUTHOR OR ANY CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENCE. NO USE OF ANY DOCUMENT OR MODIFIED VERSION OF THE DOCUMENT IS AUTHORISED HEREUNDER EXCEPT UNDER THIS DISCLAIMER; AND</para>
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		  <para>UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, WHETHER IN TORT (INCLUDING NEGLIGENCE), CONTRACT OR OTHERWISE, SHALL THE AUTHOR, INITIAL WRITER, ANY CONTRIBUTOR OR ANY DISTRIBUTOR OF THE DOCUMENT OR MODIFIED VERSION OF THE DOCUMENT OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO ANY PERSON FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR MALFUNCTION, OR ANY AND ALL OTHER DAMAGES OR LOSSES ARISING OUT OF OR RELATING TO USE OF THE DOCUMENT AND MODIFIED VERSIONS OF THE DOCUMENT, EVEN IF SUCH PARTY SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF SUCH DAMAGES.</para>
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	 <authorgroup> 
            <author>
	       <firstname>Carlos</firstname>
	       <surname>Garcia Campos</surname>
	       <affiliation>
                  <orgname>GNOME Project</orgname>
		  <address><email>carlosgc@gnome.org</email></address>
	       </affiliation>
            </author>
	    <author>
	      <firstname>Davyd</firstname>
	      <surname>Madeley</surname>
	      <affiliation>
	        <orgname>GNOME Project</orgname>
		<address><email>davyd@madeley.id.au</email></address>
	      </affiliation>
	    </author>
      <!-- This is appropriate place for other contributors: translators,
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        <othercredit role="translator">
	      <firstname>Latin</firstname> 
	      <surname>Translator 1</surname> 
	      <affiliation> 
	      	<orgname>Latin Translation Team</orgname> 
	       	<address> <email>translator@gnome.org</email> </address> 
	      </affiliation>
	      <contrib>Latin translation</contrib>
        </othercredit>
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	 </authorgroup>

	 <revhistory>
	   <revision>
	     <revnumber>GNOME 2.12</revnumber>
	     <date>August 2005</date>
	     <revdescription>
	      <para role="author">Davyd Madeley</para>
	     </revdescription>
	   </revision>
	   <revision>
	     <revnumber>GNOME 2.10</revnumber>
	     <date>March 2005</date>
	     <revdescription>
	      <para role="author">Davyd Madeley</para>
	     </revdescription>
	   </revision>
		<revision> 
		  <revnumber>CPU Frequency Scaling Monitor Applet Manual V0.3</revnumber> 
		  <date>October 2004</date> 
		  <revdescription> 
                    <para role="author">Carlos Garcia Campos</para>
                    <para role="publisher">GNOME Documentation Project</para>
		  </revdescription> 
		</revision> 
	 </revhistory> 

	 <releaseinfo>This manual describes version 2.12.0 of CPU Frequency Scaling Monitor.</releaseinfo> 

		<legalnotice> 
		<title>Feedback</title> 
		<para>To report a bug or make a suggestion regarding the CPU Frequency Scaling Monitor applet or this manual, follow the directions in the <ulink url="ghelp:gnome-feedback" type="help">GNOME Feedback Page</ulink>.</para>
	     </legalnotice>

  </articleinfo> 

  <indexterm zone="index"> 
	 <primary>CPU Frequency Scaling Monitor</primary> 
  </indexterm>
<!-- ============= Document Body ============================= -->
<!-- ============= Introduction ============================== -->
<sect1 id="cpufreq-applet-introduction"> 
	 <title>Introduction</title> 
	 <figure id="cpufreq-applet-figure"> 
	    <title>CPU Frequency Scaling Monitor</title> 
		<screenshot> 
		  <mediaobject> 
		     <imageobject>
			<imagedata fileref="figures/cpufreq-applet.png" format="PNG"/> 
		     </imageobject>
		  </mediaobject>
	       </screenshot>
	 </figure> 
    <!-- ==== End of Figure ======================================= -->
    <para>The <application>CPU Frequency Scaling Monitor</application> provides a convenient way to monitor the CPU Frequency Scaling for each CPU.</para> 
	 <para>To add <application>CPU Frequency Scaling Monitor</application> to a panel, right-click on the panel to open the panel popup menu, then choose <menuchoice><guimenu>Add to Panel</guimenu><guimenuitem>CPU Frequency Scaling Monitor</guimenuitem></menuchoice>.</para> 
	
    <note><para>Unfortunately, CPU frequency scaling can currently only be monitored on Linux machines that have support in the kernel. It can however, support the several generations of frequency scaling interfaces in the kernel.</para></note>
   
   <para>When there is no CPU frequency scaling support in the system, the CPU Frequency Scaling Monitor only displays the current CPU frequency.</para>
   <para>When CPU frequency scaling is supported in the system, the CPU Frequency Scaling Monitor displays the CPU icon with a progress bar. The state of the progress bar represents the current CPU frequency with respect to the maximum frequency.</para>
   <para>By default the CPU Frequency Scaling Monitor displays the current CPU frequency as a value in Hertz (the standard measure of frequency), but can be configured to display a percentage instead. For more information on how to configure CPU Frequency Scaling Monitor see <xref linkend="cpufreq-applet-prefs"/>.</para>
   <para>Each instance of CPU Frequency Scaling Monitor can monitor only one CPU. You must start an instance of CPU Frequency Scaling Monitor for each CPU that you want to monitor if you are in a multiprocessor (SMP) system.</para>

   <sect2 id="gnome-cpufreq-icons">
     <title>Understanding the Icons</title>
     <para>The CPU Frequency Scaling Monitor has a series of icons that graphically represent the current scaling level of the processor you are monitoring. They are:</para>
      <informaltable frame="all">
        <tgroup cols="2" colsep="1" rowsep="1">
          <colspec colname="COLSPEC0" colwidth="50*"/>
          <colspec colname="COLSPEC1" colwidth="50*"/>
          <thead>
            <row valign="top">
              <entry colname="COLSPEC0">
                <para>Icon</para></entry>
              <entry colname="COLSPEC1">
                <para>Description</para></entry>
            </row>
          </thead>
          <tbody>
            <row valign="top">
              <entry><para><inlinemediaobject><imageobject>
               <imagedata fileref="figures/cpufreq-100.png" format="PNG"/>
               </imageobject><textobject>
                <phrase>100% Power</phrase>
              </textobject></inlinemediaobject></para></entry>
	      <entry><para>The CPU is running at, or close to, 100% throughput</para></entry>
	    </row>
            <row valign="top">
              <entry><para><inlinemediaobject><imageobject>
               <imagedata fileref="figures/cpufreq-75.png" format="PNG"/>
               </imageobject><textobject>
                <phrase>75% Power</phrase>
              </textobject></inlinemediaobject></para></entry>
	      <entry><para>The CPU is running at, or close to, 75% throughput</para>
	      </entry>
	    </row>
            <row valign="top">
              <entry><para><inlinemediaobject><imageobject>
               <imagedata fileref="figures/cpufreq-50.png" format="PNG"/>
               </imageobject><textobject>
                <phrase>50% Power</phrase>
              </textobject></inlinemediaobject></para></entry>
	      <entry><para>The CPU is running at, or close to, 50% throughput</para></entry>
	    </row>
            <row valign="top">
              <entry><para><inlinemediaobject><imageobject>
               <imagedata fileref="figures/cpufreq-25.png" format="PNG"/>
               </imageobject><textobject>
                <phrase>25% Power</phrase>
              </textobject></inlinemediaobject></para></entry>
	      <entry><para>The CPU is running at, or close to, 25% throughput</para></entry>
	    </row>
	  </tbody>
	</tgroup>
      </informaltable>
   </sect2>
   
   <sect2 id="gnome-cpufreq-selector">
      <title>Frequency and Governor Selector</title>
      <warning><para>The Frequency Selector functionality may not be available on your GNOME Desktop by default. Please consult your system administrator, vendor documentation or the documentation that came with this software.</para></warning>
      <para>To set the CPU frequency, left click on the monitor and a menu will be shown. This menu will offer you a list of available frequencies and/or frequency governors for your machine.</para>
      <tip><para>You can choose whether you want to show available frequencies or governors in the <guilabel>Preferences</guilabel>. See <xref linkend="cpufreq-applet-prefs"/> for more information.</para></tip>

      <figure id="cpufreq-applet-selector-img">
	 <title>Frequency selector showing just frequencies</title>
	 <screenshot>
	    <mediaobject>
	       <imageobject>
		  <imagedata fileref="figures/cpufreq-applet-selector.png" format="PNG"/>
	       </imageobject>
	    </mediaobject>
	</screenshot>
      </figure>

      <figure id="cpufreq-applet-selector-both-img">
	 <title>Frequency selector showing both frequencies and governors</title>
	 <screenshot>
	    <mediaobject>
	       <imageobject>
		  <imagedata fileref="figures/cpufreq-applet-selector-both.png" format="PNG"/>
	       </imageobject>
	    </mediaobject>
	</screenshot>
      </figure>
   </sect2>
</sect1>

<!-- ============= Customization ============================= -->
<!-- Use this section to describe how to customize the applet. -->
<sect1 id="cpufreq-applet-prefs"> 
	 <title>Preferences</title> 
	 <para>To configure the <application>CPU Frequency Scaling Monitor</application>, right-click on the applet, then choose <guimenuitem>Preferences</guimenuitem> from the popup menu.</para> 
	 <para>The <guimenuitem>Preferences</guimenuitem> dialogue contains the following components:</para> 
	 <figure id="cpufreq-applet-preferences">
	    <title>CPU Frequency Scaling Monitor Preferences Dialogue</title>
	    <screenshot>
	       <mediaobject>
		  <imageobject><imagedata fileref="figures/cpufreq-applet-preferences.png" format="PNG"/>
		  </imageobject>
		  <textobject>
		     <phrase>CPU Frequency Scaling Monitor preferences dialogue</phrase>
		  </textobject>
	       </mediaobject>
	    </screenshot>
	 </figure>

	 <variablelist> 
	   <varlistentry> 
	      <term><guilabel>Monitored CPU (only in multiprocessor systems)</guilabel></term> 
	     <listitem> 
		<para>Use this drop-down list to select the CPU that you want to monitor.</para>
	 <figure id="cpufreq-applet-preferences-smp">
	    <title>Selecting the CPU to monitor</title>
	    <screenshot>
	       <mediaobject>
		  <imageobject><imagedata fileref="figures/cpufreq-applet-preferences-smp.png" format="PNG"/>
		  </imageobject>
		  <textobject>
		     <phrase>CPU Frequency Scaling Monitor preferences dialog CPU selector</phrase>
		  </textobject>
	       </mediaobject>
	    </screenshot>
	 </figure>
	<note><para>The <guilabel>Monitored CPU</guilabel> option will only appear on multiprocessor (SMP) systems.</para></note>
	 
	     </listitem>
	   </varlistentry> 
	   <varlistentry> 
	      <term><guilabel>Show in Mode</guilabel></term> 
	     <listitem> 
		<para>Use this drop-down list to select the mode in which you want to display the applet. Available modes are: Graphic, Text and both (Graphic and Text)</para> 
	    </listitem>
	 </varlistentry>
	 <varlistentry>
	    <term><guilabel>Show CPU frequency as frequency</guilabel></term>
	    <listitem>
	       <para>Select this option to display the current CPU frequency.</para>
	    </listitem>
	 </varlistentry>
	 <varlistentry>
	    <term><guilabel>Show frequency units</guilabel></term>
	    <listitem>
	       <para>Select this option to display or not the frequency units in the frequency mode.</para>
	    </listitem>
	 </varlistentry>
	  <varlistentry>
	     <term><guilabel>Show CPU frequency as percentage</guilabel></term>
	     <listitem>
		<para>Select this option to display the current CPU frequency as a percentage.</para>
	     </listitem>
	  </varlistentry>

	  <varlistentry><term><guilabel>Show menu</guilabel></term>
	   <listitem>
	    <para>This option allows you to choose how much information is shown in the frequency selector dropdown (see <xref linkend="gnome-cpufreq-selector"/>). You can select to display <guilabel>Frequencies</guilabel>, <guilabel>Governors</guilabel> or both <guilabel>Frequencies and Governors</guilabel>. <figure id="cpufreq-applet-selector-both-2">
	    <title>The selector configured to Frequencies and Governors</title>
	    <screenshot>
	       <mediaobject>
		  <imageobject><imagedata fileref="figures/cpufreq-applet-selector-both.png" format="PNG"/>
		  </imageobject>
		  <textobject>
		     <phrase>CPU governors selector</phrase>
		  </textobject>
	       </mediaobject>
	    </screenshot>
	 </figure></para>
	  </listitem></varlistentry>
       </variablelist>
  </sect1>

</article>
