FYI: superlinear speedups in GROMACS (fwd)

Eugene Leitl Eugene.Leitl at lrz.uni-muenchen.de
Fri Mar 8 16:29:55 EST 2002


On Fri, 8 Mar 2002, Dominic Wu wrote:

> Would not a single CPU with a larger L2 cache solve the problem better then?

Caches are very expensive due to chip yield reasons (bad die yield goes up
exponentially with die size). In fact, it would make sense to drop cache
from dies, and go for embedded memory instead, which also removes lots of
other overhead, such as branch prediction and pipelining, plus allows to
go to very broad on-die buses and hence naturally foster VLIW and SIMD.

However, as COTS consumers we're bound to what the market gives us.
Hopefully, Blue Gene architectures and embedded memory in general will
find its way into mainstream PCs and hence clusters.

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