A Gentoo x32 release candidate [LWN.net]

A Gentoo x32 release candidate

Posted Jun 8, 2012 20:54 UTC (Fri) by butlerm (subscriber, #13312)
In reply to: A Gentoo x32 release candidate by andrel
Parent article: A Gentoo x32 release candidate

> I'll bite -- what are the classes of programs for which x32 gets a 40% speedup over x86-64?

The specific example I had in mind is 181.mcf, part of the SPEC 2000 CPU benchmark.

http://www.spec.org/cpu2000/CINT2000/181.mcf/docs/181.mcf...

I imagine that many Perl, Python, and Java programs will show comparable improvements, in addition to compilers, linkers, web browsers, xml processors, interpreters, x32 native kernels, and garbage collected languages in general.

With support for near and far pointers it is conceivable one could dramatically improve kernel performance as well, making an x32/x86-64 hybrid kernel perform nearly as well as an x32 native one, without losing the ability to support 64 bit applications.

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