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On 15:34 Thu 15 Sep , Mike Frysinger wrote: |
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> ive converted my system over to x86/amd64/x32 multilib for funs. but i can |
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> see how some people wont want all three all the time. so the question is how |
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> we want to make this available to users at the release/profile level. |
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> |
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> background: x32 is a new ABI that runs on 64bit x86_64 processors. see [1]. |
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> you'll need gcc-4.7+, binutils-2.21.50+, glibc-2.15+, and linux-3.2+. |
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For anyone interested how the performance compares to amd64 in more |
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comprehensive tests, check out the slides from the Linux Plumbers |
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Conference (particularly 14-21): |
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http://linuxplumbersconf.org/2011/ocw/proposals/531 |
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In summary, on those benchmarks it looks like a small global win (maybe |
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5%) on integer calculations with a few huge wins of ≥25%, but a net loss |
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around 5% pretty much globally for floating-point calculations. |
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Most people probably do a lot more integer calculations unless they're |
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science geeks like me, plus it should have lower memory use, so my |
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understanding is that it probably makes sense to switch to x32 no matter |
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what you're using now (x86 or amd64). |
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Mike, would you agree? |
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-- |
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Thanks, |
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Donnie |
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|
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Donnie Berkholz |
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Council Member / Sr. Developer |
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Gentoo Linux |
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Blog: http://dberkholz.com |
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