<div>Btw, how is <a href="http://software.sandia.gov/trilinos/"><font color="#800080">Trilinos/ML</font></a> used and installed? Is the command to download also --download<u>-</u><a href="http://software.sandia.gov/trilinos/">
<font color="#800080">Trilinos/ML</font></a> ? waht about the command to use it?</div>
<div> </div>
<div>Thank you.<br><br> </div>
<div><span class="gmail_quote">On 2/12/07, <b class="gmail_sendername">Ben Tay</b> <<a href="mailto:zonexo@gmail.com">zonexo@gmail.com</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div>Hi Satish,</div>
<div> </div>
<div>I've installed superlu. I issued the command ./a.out <font color="#550055"> <font color="#000000">-mat_type superlu -ksp_type preonly -pc_type lu and it just hanged there. Is it because I had install it with mpich? I also wanted to try umfpack and plapack. Is it similar?
</font></font></div>
<div><font color="#550055"><font color="#000000"></font></font> </div>
<div><font color="#550055"><font color="#000000">Btw, plapack 's option isn't in pg 82 of the manual.</font></font></div>
<div> </div>
<div> </div>
<div>Thank you.<br><br> </div>
<div><span class="e" id="q_110b6a8bb8581586_1">
<div><span class="gmail_quote">On 2/12/07, <b class="gmail_sendername">Satish Balay</b> <<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:balay@mcs.anl.gov" target="_blank">balay@mcs.anl.gov</a>> wrote:
</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">On Mon, 12 Feb 2007, Ben Tay wrote:<br><br>> Hi,<br>><br>> I'm trying to experiment with using external solvers. I have some questions:
<br>><br>> 1. Is there any difference in speed with calling the external software from<br>> PETSc or directly using them?<br><br>There is minor conversion overhead when you use them from PETSc.<br><br>><br>> 2. I tried to install MUMPS using --download-mumps. I was prompted to
<br>> include --with-scalapack. After changing, I was again prompted to include<br>> --with-blacs. I changed and again I was told the need for<br>> --with-blacs-dir=<directory>. I thought I'm supposed to specify where to
<br>> install blacs and entered a directory. But it seems that I need to specify<br>> the location of where blacs is. But I do not have it. So how do I solve<br>> that?<br><br>Mumps requires blacs & scalapack. So use:
<br>--download-blacs=1 --download-scalapack=1 --download-mumps=1<br><br>><br>> 3. I installed some other external packages. I wanted to test their speed at<br>> solving equations. In the manual, I was told to use the runtime option
<br>> -mat_type <mattype> -ksp_type preonly -pc_type <pctype> and also -help to<br>> get help msg. However when I tried to issue ./a.out -mat_type superlu<br>> -ksp_type preonly -pc_type lu, nothing happened. How should the command be
<br>> issued? I tried to get help by running ./a.out -h what appears isn't what I<br>> want.<br><br>Did you install PETSc with superlu_dist? If so use '-mat_type superlu_dist'<br><br>[Note: superlu & superlu_dist are different packages - the first one
<br>is sequential - the second one is parallel]<br><br>Satish<br><br>><br>> Thank you very much. Regards.<br>><br><br></blockquote></div><br></span></div></blockquote></div><br>