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A comment on Cache Lines Are The New Registers.

Re:Cache Lines Are The New Registers by zurn on Sunday September 02, 2012 @11:13AM (#4467169)
The high level problem is that compilers take the memory layout of data as given and punt on optimizing the memory behaviour of programs. Partly the fault of languages that aren't amenable to dynamic data layout optimizations but it doesn't seem a very active area of research either.
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Re:Cache Lines Are The New Registers by DannyBee on Sunday September 02, 2012 @10:21PM (#4468880)
What?

Compilers have been studying and doing data and loop reordering (for memory optimization) optimizations for many many years.

In fact, some of these are even famous (http://www.hpcwire.com/hpcwire/2007-11-09/compilers_and_more...). Look at the art hack.

This is a very active area of research. CGO, one of the main compiler conference, has had many papers on memory and data optimization in the past 5 years, and PLDI did before that.

Google for "structure layout optimization compiler", "Data structure optimization compiler", "polyhedral loop optimization compiler".

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