<div class="gmail_quote">On Fri, Feb 24, 2012 at 14:43, Francis Poulin <span dir="ltr"><<a href="mailto:fpoulin@uwaterloo.ca">fpoulin@uwaterloo.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
It seems to scale beautifully starting at 2 but there is a big drop from 1 to 2. I suspect there's a very good reason for this, I just don't know what.</blockquote></div><br><div>Can you send the full output? The smoother is slightly different, so the number of iterations could be different by 1 (for example). The -log_summary part of the output will show us where the time is being spent, so we'll be able to say what did not scale well between 1 and 2 procs.</div>