<div class="gmail_quote">2011/7/5 Yixun Liu <span dir="ltr"><<a href="mailto:yxliuwm@gmail.com">yxliuwm@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><font face="Arial" size="2">I have a PETSc application and I can start it using
the command:</font></div>
<div><font face="Arial" size="2">mpiexec -n 4 app.exe</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">I would like to know if I can start the four
processes in one process.</font></div></blockquote></div><br><div>Yes, but you would have to use the MPI-2 dynamic process management. It will take some effort and I don't recommend it unless you're really sure that's what you want.</div>