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On 30/07/12 23:42, Walter Dnes wrote: |
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> On Mon, Jul 30, 2012 at 11:40:50AM -0500, Alecks Gates wrote |
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> |
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>> What are the benefits and drawbacks of using the x32 ABI, other than |
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>> the obvious "experimental" cautions? I currently do not have a |
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>> computer with more than 4GB of ram, and one only has 2GB (used as a |
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>> media center). |
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> |
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> In theory, real life is identical to theory. In real life, real life |
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> is different from theory. A 32-bit system can directly address 4 gigs |
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> of memory. The problem is that the 4 gigs includes your video ram. So |
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> you lose part of the top end of your 4 gigs of ram, to make room for |
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> your video card's ram. This is true for both linux and Windows. A bit |
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> over 3 gigs is the effective memory max for 32-bit systems. |
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> |
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> 32-bit linux can access the extra ram for data storage, via some |
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> jumping through flaming hoops, but it's slower than direct addressing |
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> via 64-bit mode. If you have 4 gigs on a machine, it's a candidate for |
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> 64-bit mode. |
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> |
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|
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That's a problem with x86, not x32. x32 is a 64-bit mode. It's a new |
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ABI :-) |
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