Barry Smith <bsm...@mcs.anl.gov> writes: > Even if it "helps" in only 30 percent of applications that is still > a good thing (and a great thing politically). Then it becomes an > issue of education and proper profiling tools to tell people for > their apps that it won't work; so the other 70% is not "confused".
How much does it have to help those 30% if the complexity contributes to driving 30% of potential new users away from HPC? I'm in favor of doing the simplest thing until presented with overwhelming evidence that the complicated thing is necessary. I understand that this doesn't win grants; you have to say that the simple thing that has been working will never work at exascale. > Note that Marc Snir today told me that it is perfectly fine if the > "largest computing systems", i.e. the LCFs can only provide useful > performance for a small subset of all possible applications. Even when that small subset does not contain the primary apps used to sell the machines to Congress. It's just too difficult to have a consistent story.
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