<div dir="ltr">On Tue, Apr 3, 2018 at 4:06 PM Jed Brown <<a href="mailto:jed@jedbrown.org">jed@jedbrown.org</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Communicators should be cheap. One per library per "size" isn't a huge<br>
number of communicators.<br></blockquote><div><br></div><div>I agree - but that's not what we're getting here. We're getting one per "object" (Mat / Preconditioner, etc.) associated with the library per "size". If we can fix that I agree that there's no problem (we use a lot of libraries... but not 2000 separate ones simultaneously!).</div><div><br></div><div>Derek</div></div></div>