[petsc-dev] http://www.hpcwire.com/hpcwire/2012-11-12/intel_brings_manycore_x86_to_market_with_knights_corner.html

[John Fettig]

On Mon, Nov 12, 2012 at 8:56 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Mon, Nov 12, 2012 at 7:49 PM, John Fettig <john.fettig at gmail.com>wrote:
>
>> Then add on top of this the fact that you could simply recompile PETSc,
>> run it natively on the card, and still run it on your CPU's as MPMD.
>
>
> This is a good way to get terrible performance.
>

Why?  Decompose your domain to take into account the imbalance in
computational power.  The link between the card and the CPU is going to be
faster than going to another node.

John
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20121112/6f70d5c7/attachment.html>