Hetero operations tend to lose a little performance due to the need to convert data, but otherwise there is no real negative. We don&#39;t do it by default solely because the majority of installations don&#39;t need to, and there is no reason to lose even a little performance if it isn&#39;t necessary.<div>
<br></div><div>If you want an application to be able to span that mix, then you&#39;ll need to set that configure flag.<br><br><div class="gmail_quote">On Thu, Oct 7, 2010 at 1:44 PM, David Ronis <span dir="ltr">&lt;<a href="mailto:David.Ronis@mcgill.ca">David.Ronis@mcgill.ca</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">I have various boxes that run openmpi and I can&#39;t seem to use all of<br>
them at once because they have different CPU&#39;s (e.g., pentiums, athlons<br>
(both 32 bit) vs Intel I7 (64 bit)).   I&#39;m about the build 1.4.3 and was<br>
wondering if I should add --enable-heterogenous to the configure flags.<br>
Any advice as to why or why not would be appreciated.<br>
<br>
David<br>
<br>
<br>
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