On Sun, Mar 20, 2011 at 10:03 AM, Joshua Booth <span dir="ltr"><<a href="mailto:jdbst21@gmail.com">jdbst21@gmail.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi reading about MatGetsubMatrices, that it must be called on all processors the same number of times. <div>Does this mean all processors in PETSC_COMM_WORLD or on all processors that contain the Parent Matrix.</div></blockquote>
<div><br></div><div>All processes in the Mat communicator.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div>For example. If I am using four processors, but only rank=0 has a seq matrix A and it wants a seq subA on rank=0, do the other three processors need to make a call?</div>
</blockquote><div><br></div><div>No.</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div>Thanks</div><div>
<br></div><div>Josh</div>
</blockquote></div><br><br clear="all"><br>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener<br>