<tt><font size=2><br>
> From: Rob Ross <rross@mcs.anl.gov></font></tt>
<br><tt><font size=2>> <br>
> Should we consider this as interest in working on this problem on
<br>
> the IBM side :)? -- Rob<br>
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<br><tt><font size=2>Say what?! ;)</font></tt>
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<br><tt><font size=2>Meaning we can get rid of all o(p) allocations? Not
sure how you do internal collectives on behalf of the app/mpi-io without
at least some of those. I was looking more for agreement that collective
i/o is 'what it is'... and maybe some idea if we just have some known limitations
on scaling it. Yes, that BG alltoallv is a bigger problem that we
can avoid with an env var -- is that just going to have to be 'good enough'?
(I think that Jeff P wrote that on BG/P and got good performance
with that alltoallv. Trading memory for performance, not unusual,
and at least it's selectable.)</font></tt>
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