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validation_gemspc-gpu.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<tr>
<td id="content-inside"><div id="content_fixed_bg"><table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="left" valign="top"><p><img src="images/t_benchmark.jpg" width="134" height="23" /></p></td>
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<tr>
<td align="left" valign="middle"><strong class="hd02">GEMS PC v.s. GPU</strong></td>
</tr>
<tr>
<td align="left" valign="middle"> </td>
</tr>
<tr>
<td align="left" valign="top" class="text">We compare the two regular PCs installed with Windows Vista and GEMS software 6.0 with the GPU workstation installed with other commercial FDTD software for a cell phone model simulation. The number of unknowns (6.4Mcells), excitation source type (lumped port), output parameters (far field pattern at 2 frequencies) are same in the simulations of GEMS PC and GPU workstation. Two GEMS PCs, which are directly connected each other by a 3-meter long regular network cable, are much faster than the GPU workstation. The two computers (their total cost is about US$2000.00) can be used as the general purpose when they are not used for the GEMS simulation.</td>
</tr>
<tr>
<td align="left" valign="middle"> </td>
</tr>
<tr>
<td align="left" valign="middle" class="text"><p class="hd03">GEMS Simulation Settings </p></td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="center"></div></td>
</tr>
<tr>
<td align="left" valign="middle" class="text"><div align="center">
<table width="90%" border="0" align="center" cellpadding="1" cellspacing="3" class="table-border">
<tr>
<td width="14%" align="left" valign="top" bgcolor="#0056E9" class="text-white">Memory<br />
usage</td>
<td width="15%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">
<div align="center">Absorbing boundary</div>
</div></td>
<td width="13%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">
<div align="center">Parallel processing</div>
</div></td>
<td width="13%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">Excitation<br />
source</div></td>
<td width="13%" align="left" valign="top" bgcolor="#0056E9" class="text-white">Convergence criterion</td>
<td width="15%" align="left" valign="middle" bgcolor="#0056E9" class="text-white">Minimum <br />
cell size (mm)</td>
<td width="17%" align="left" valign="middle" bgcolor="#0056E9" class="text-white">Number of <br />
time steps</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">351 MB</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">6-layer CPML</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">MPI/OpenMP</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">Lumped port</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">-30 dB</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">(0.5, 0.4, 0.5)</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">15,465</div></td>
</tr>
</table>
</div></td>
</tr>
<tr>
<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td align="left" valign="middle" class="hd03">Model Information</td>
</tr>
<tr>
<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td align="left" valign="middle" class="text"><table width="90%" border="0" align="center" cellpadding="1" cellspacing="3" class="table-border">
<tr>
<td width="14%" align="left" valign="middle" bgcolor="#0056E9" class="text-white">Model </td>
<td width="15%" align="left" valign="middle" bgcolor="#0056E9" class="text"><div align="center" class="text-white">
<div align="center">CAD file size</div>
</div></td>
<td width="13%" align="left" valign="middle" bgcolor="#0056E9" class="text"><div align="center" class="text-white">
<div align="center">Phone case</div>
</div></td>
<td width="13%" align="left" valign="middle" bgcolor="#0056E9" class="text"><div align="center" class="text-white">Cover</div></td>
<td width="13%" align="left" valign="middle" bgcolor="#0056E9" class="text-white"><div align="center">Screen</div></td>
<td width="15%" align="left" valign="middle" bgcolor="#0056E9" class="text-white">Antenna</td>
<td width="17%" align="left" valign="middle" bgcolor="#0056E9" class="text-white">PCB</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">SAT </div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">1.334 MB</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">Dielectric (3.0)</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">Dielectric (2.8)</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">PEC</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">Copper</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">FR4</div></td>
</tr>
</table></td>
</tr>
<tr>
<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td height="1" align="left" valign="top" bgcolor="#FFCC33"></td>
</tr>
<tr>
<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td height="30" align="center" valign="middle" class="hd03">GEMS PC Platform</td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="left" style="padding-left:75px;"><img src="images/img_benchmark-gems07.jpg" width="808" height="191" /></div></td>
</tr>
<tr>
<td align="left" valign="middle" class="text"><div align="center">
<table width="90%" border="0" align="center" cellpadding="1" cellspacing="3" class="table-border">
<tr>
<td width="22%" align="left" valign="top" bgcolor="#0056E9" class="text-white">Processor </td>
<td width="14%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white"> Memory</div></td>
<td width="16%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">OS</div></td>
<td width="15%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">GEMS Software</div></td>
<td width="14%" align="left" valign="middle" bgcolor="#0056E9" class="text-white">Cost</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">Intel i7-860 2.8GHz</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">4GB DDR3 1333MHz</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">Windows Vista</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">GEMS v6.0</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">US$1k</div></td>
</tr>
</table>
</div></td>
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<tr>
<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td align="left" valign="middle" class="hd03">Comparison of GEMS PC and Other Commercial FDTD GPU workstation </td>
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<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td align="left" valign="middle" class="text"><div align="center">
<table width="90%" border="0" align="center" cellpadding="1" cellspacing="3" class="table-border">
<tr>
<td width="22%" align="left" valign="top" bgcolor="#0056E9" class="text-white">Hardware platform</td>
<td width="27%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">Simulation time</div></td>
<td width="21%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">Problem size</div></td>
<td width="30%" align="left" valign="top" bgcolor="#0056E9" class="text-white">Outputs</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="left">Single PC<br />
(Intel i7-860 2.8GHz)<br />
(cost: US$1k)</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="left">44 min. 46 sec.<br />
(Pre-processing: 4 min. 44 sec.<br />
+ Simulation: 40 min. 2 sec.)</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">118 x 451 x 120<br />
(6.5 Mcells)<br />
</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">(1) Return loss;<br />
(2) Far field patterns
at 2 frequencies</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">GPU workstation<br />
(cost: US$17k)</td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;"><div align="left">58 min. 26 sec.<br />
(39min.43 sec. (Broadband)<br />
+ 18 min. 43 sec. (harmonic) ) <br />
</div></td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;"><div align="center">6.4 Mcells</div></td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">(1) Return loss;<br />
(2) Far field patterns
at 2 frequencies</td>
</tr>
</table>
</div></td>
</tr>
<tr>
<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td height="1" align="left" valign="top" bgcolor="#FFCC33"></td>
</tr>
<tr>
<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td height="25" align="left" valign="top" class="hd03"><p>GEMS Two-PC Acceleration Platform </p></td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="left" style="padding-left:50px;"><img src="images/img_benchmark-gems08.jpg" width="844" height="216" /></div></td>
</tr>
<tr>
<td align="left" valign="middle" class="text"> </td>
</tr>
<tr>
<td align="left" valign="middle" class="text"><div align="center">
<table width="90%" border="0" align="center" cellpadding="1" cellspacing="3" class="table-border">
<tr>
<td width="22%" align="left" valign="top" bgcolor="#0056E9" class="text-white">Hardware platform</td>
<td width="27%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">Simulation time</div></td>
<td width="21%" align="left" valign="top" bgcolor="#0056E9" class="text"><div align="center" class="text-white">Problem size</div></td>
<td width="30%" align="left" valign="top" bgcolor="#0056E9" class="text-white">Outputs</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="left">Two PCs<br />
(Intel i7-860 2.8GHz)<br />
(cost: US$2k)<br />
</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="left">25 min. 37 sec.<br />
(Pre-processing: 2 min. 30 sec.<br />
+ Simulation: 23 min. 7 sec.)</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;"><div align="center">118 x 451 x 120<br />
(6.5 Mcells)<br />
</div></td>
<td align="left" valign="top" bgcolor="#FEF4D1" class="text" style="padding-left:5px;">(1) Return loss;<br />
(2) Far field patterns
at 2 frequencies</td>
</tr>
<tr>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">GPU workstation<br />
(cost: US$17k)</td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;"><div align="left">58 min. 26 sec.<br />
(39min.43 sec. (Broadband)<br />
+ 18 min. 43 sec. (harmonic) ) <br />
</div></td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;"><div align="center">6.4 Mcells</div></td>
<td align="left" valign="top" bgcolor="#FDECB3" class="text" style="padding-left:5px;">(1) Return loss;<br />
(2) Far field patterns
at 2 frequencies</td>
</tr>
</table>
</div></td>
</tr>
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</table>
</div></td> </tr>
</table>
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