Changeset 62 for palm/trunk/DOC/app/chapter_4.1.html
- Timestamp:
- Mar 13, 2007 2:52:40 AM (18 years ago)
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palm/trunk/DOC/app/chapter_4.1.html
r61 r62 1 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2 2 <html><head> 3 <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"><title>PALM 4 chapter 4.1</title></head> 3 <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"><title>PALM chapter 4.1</title></head> 5 4 <body><h3><a name="chapter4.1"></a>4.1 6 5 Initialization parameters</h3> … … 874 873 of waves with wavelengths longer than 2-delta (see the paper by Mahrer 875 874 and 876 Pielke, quoted above). </p> </td> </tr> <tr> 875 Pielke, quoted above). </p> </td> </tr> <tr><td style="vertical-align: top;"><a name="loop_optimization"></a><span style="font-weight: bold;">loop_optimization</span></td><td style="vertical-align: top;">C*16</td><td style="vertical-align: top;"><span style="font-style: italic;">see right</span></td><td>Method used to optimize loops for solving the prognostic equations .<br><br>By 876 default, the optimization method depends on the host on which PALM is 877 running. On machines with vector-type CPUs, single 3d-loops are used to 878 calculate each tendency term of each prognostic equation, while on all 879 other machines, all prognostic equations are solved within one big loop 880 over the two horizontal indices<span style="font-family: Courier New,Courier,monospace;"> i </span>and<span style="font-family: Courier New,Courier,monospace;"> j </span>(giving a good cache uitilization).<br><br>The default behaviour can be changed by setting either <span style="font-weight: bold;">loop_optimization</span> = <span style="font-style: italic;">'vector'</span> or <span style="font-weight: bold;">loop_optimization</span> = <span style="font-style: italic;">'cache'</span>.</td></tr><tr> 877 881 <td style="vertical-align: top;"><a name="mixing_length_1d"></a><span style="font-weight: bold;">mixing_length_1d</span><br> 878 882 </td> <td style="vertical-align: top;">C*20<br>
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